/* ============================================================================
   MAHOR — Design System & Styles
   پلتفرم بیت و آکادمی موسیقی — دموی طراحی و توسعه RAJ
   ----------------------------------------------------------------------------
   1) Fonts   2) Tokens  3) Reset/Base  4) Utilities  5) Header/Nav
   6) Footer  7) Player/Toasts/Modal  8) Home sections  9) Store (beats)
   10) Beat detail  11) Academy  12) Course  13) Lesson  14) About
   15) Cart  16) Motion/Reduced  17) Responsive
   ========================================================================== */

/* ---------------------------------------------------------------- 1) Fonts */
@font-face {
  font-family: "Vazirmatn";
  src: url("../assets/fonts/vazirmatn-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("../assets/fonts/vazirmatn-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("../assets/fonts/vazirmatn-700.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Anton";
  src: url("../assets/fonts/anton-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

/* --------------------------------------------------------------- 2) Tokens */
:root {
  /* color */
  --bg: #0b0b0d;
  --bg-2: #101014;
  --surface: #15151a;
  --surface-2: #1b1b21;
  --surface-3: #22222a;
  --ink: #f4f1ea;
  --ink-dim: #a9a59c;
  --ink-faint: #75726b;
  --line: rgba(244, 241, 234, 0.12);
  --line-strong: rgba(244, 241, 234, 0.28);
  --acid: #d6ff3f;
  --acid-deep: #b7e02a;
  --acid-ink: #10120a;
  --red: #ff6a55;
  --ok: #9be38c;

  /* type */
  --font-fa: "Vazirmatn", "Segoe UI", Tahoma, "Noto Sans Arabic", sans-serif;
  --font-en: "Anton", "Arial Narrow", Impact, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, monospace;

  --fs-display: clamp(2.7rem, 7.2vw, 5.6rem);
  --fs-h1: clamp(2rem, 4.6vw, 3.4rem);
  --fs-h2: clamp(1.55rem, 3.2vw, 2.5rem);
  --fs-h3: clamp(1.15rem, 2vw, 1.4rem);
  --fs-body: clamp(0.95rem, 1.1vw, 1.05rem);
  --fs-sm: 0.875rem;
  --fs-xs: 0.78rem;
  --lh-fa: 1.9;
  --lh-head: 1.45;

  /* space */
  --s1: 0.25rem;
  --s2: 0.5rem;
  --s3: 0.75rem;
  --s4: 1rem;
  --s5: 1.5rem;
  --s6: 2rem;
  --s7: 3rem;
  --s8: 4.5rem;
  --sec-y: clamp(3.5rem, 8vw, 6.5rem);

  /* layout */
  --container: 1240px;
  --container-narrow: 880px;
  --header-h: 68px;

  /* shape */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-pill: 999px;
  --shadow-1: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 24px 70px rgba(0, 0, 0, 0.55);

  /* motion */
  --t-fast: 150ms;
  --t: 260ms;
  --t-slow: 520ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  /* layers */
  --z-header: 60;
  --z-nav: 55;
  --z-player: 70;
  --z-modal: 90;
  --z-toast: 95;
}

/* ----------------------------------------------------------- 3) Reset/Base */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-fa);
  font-size: var(--fs-body);
  line-height: var(--lh-fa);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* بافت ظریف استودیویی — ثابت و بی‌حرکت */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

main { position: relative; z-index: 2; }
#site-header, .site-footer, .player-bar, .toasts, .modal { position: relative; z-index: 10; }
#site-header { z-index: var(--z-header); }
.player-bar { z-index: var(--z-player); }
.modal { z-index: var(--z-modal); }
.toasts { z-index: var(--z-toast); }

h1, h2, h3, h4 {
  line-height: var(--lh-head);
  margin: 0 0 0.5em;
  font-weight: 700;
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }

fieldset { border: 0; margin: 0; padding: 0; min-inline-size: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
ul, ol { margin: 0; padding: 0; }
::selection { background: var(--acid); color: var(--acid-ink); }

:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: 3px;
  border-radius: 3px;
}

.sprite { display: none; }
.ico { width: 1.15em; height: 1.15em; flex: none; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed;
  top: -60px;
  inset-inline-start: 16px;
  background: var(--acid);
  color: var(--acid-ink);
  padding: 0.6em 1.2em;
  border-radius: var(--r-sm);
  font-weight: 700;
  z-index: 200;
  transition: top var(--t) var(--ease);
}
.skip-link:focus { top: 12px; }

/* ------------------------------------------------------------- 4) Utilities */
.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}
.container--narrow { width: min(100% - 2.5rem, var(--container-narrow)); }

.section { padding-block: var(--sec-y); position: relative; }
.section--alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s5);
  margin-bottom: var(--s6);
}
.section-head__kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--acid);
  font-weight: 500;
  margin-bottom: 0.4rem;
}
.section-head__kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--acid);
}
.section-head h2 { margin: 0; }
.section-head__sub { color: var(--ink-dim); max-width: 52ch; margin-top: 0.5rem; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 500;
  color: var(--ink-dim);
  transition: color var(--t-fast) var(--ease);
  white-space: nowrap;
}
.link-arrow .ico { transition: transform var(--t) var(--ease); }
.link-arrow:hover { color: var(--acid); }
.link-arrow:hover .ico { transform: translateX(-4px); }

.font-en { font-family: var(--font-en); font-weight: 400; letter-spacing: 0.02em; }
.outline-text {
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(244, 241, 234, 0.24);
  paint-order: stroke fill;
}
.acid { color: var(--acid); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28em 0.8em;
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  font-weight: 500;
  border: 1px solid var(--line-strong);
  background: rgba(11, 11, 13, 0.72);
  backdrop-filter: blur(4px);
}
.tag--free { background: var(--acid); border-color: var(--acid); color: var(--acid-ink); font-weight: 700; }
.tag--pro { background: rgba(11, 11, 13, 0.85); border-color: var(--acid); color: var(--acid); letter-spacing: 0.08em; }
.tag--mute { background: rgba(11, 11, 13, 0.85); border-color: var(--line-strong); color: var(--ink-dim); }
.tag--genre { letter-spacing: 0.06em; }

.price {
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.price__from {
  font-weight: 400;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  margin-inline-end: 0.15rem;
}
.price--free { color: var(--acid); }

.lvl { display: inline-flex; align-items: center; gap: 0.45rem; }
.dots { display: inline-flex; gap: 3px; }
.dots i {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--line-strong);
}
.dots i.on { background: var(--acid); }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8em 1.7em;
  border-radius: var(--r-md);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.3;
  border: 1px solid transparent;
  transition: transform var(--t-fast) var(--ease), background var(--t-fast),
    color var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
  text-align: center;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn--primary {
  background: var(--acid);
  color: var(--acid-ink);
  box-shadow: 0 6px 24px rgba(214, 255, 63, 0.18);
}
.btn--primary:hover { background: #e3ff6e; transform: translateY(-2px); }
.btn--line {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn--line:hover { border-color: var(--acid); color: var(--acid); }
.btn--line:hover .ico { color: var(--acid); }
.btn--solid {
  background: var(--surface-2);
  border-color: var(--line);
  color: var(--ink);
}
.btn--solid:hover { background: var(--surface-3); border-color: var(--line-strong); }
.btn--tiny {
  padding: 0.45em 1em;
  font-size: var(--fs-xs);
  border-radius: var(--r-sm);
  font-weight: 500;
  min-height: 36px;
}
.btn--wide { width: 100%; }
.btn--lg { padding: 1em 2.1em; font-size: 1.02rem; }
.btn.is-done { background: var(--ok); color: var(--acid-ink); border-color: transparent; }
.btn:disabled,
.btn.is-muted {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none;
}
.btn .ico { width: 1.2em; height: 1.2em; }

/* form controls */
.field {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 0.15em 1em;
  transition: border-color var(--t-fast);
}
.field:focus-within { border-color: var(--acid); }
.field .ico { color: var(--ink-faint); flex: none; }
.field input {
  background: none;
  border: 0;
  outline: none;
  padding: 0.75em 0;
  width: 100%;
  min-width: 0;
}
.field input::placeholder { color: var(--ink-faint); }
select.sel {
  appearance: none;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a9a59c' stroke-width='1.6' fill='none'/%3E%3C/svg%3E") no-repeat left 1em center;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 0.7em 1em;
  padding-left: 2.4rem;
  outline: none;
  min-height: 46px;
  cursor: pointer;
  transition: border-color var(--t-fast);
}
select.sel:hover, select.sel:focus-visible { border-color: var(--line-strong); }
select.sel { max-width: 100%; }
label.form-label {
  display: block;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

/* chips / segmented */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  padding: 0.5em 1.15em;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  font-size: var(--fs-sm);
  transition: all var(--t-fast) var(--ease);
  min-height: 40px;
}
.chip:hover { border-color: var(--line-strong); color: var(--ink); }
.chip[aria-pressed="true"],
.chip.is-on {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--acid-ink);
  font-weight: 700;
}
.chip__n { font-size: var(--fs-xs); opacity: 0.75; margin-inline-start: 0.3rem; }

/* play button (shared) */
.play-btn {
  position: absolute;
  inset-block-end: 12px;
  inset-inline-start: 12px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(11, 11, 13, 0.78);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  backdrop-filter: blur(6px);
  opacity: 0;
  transform: translateY(6px);
  transition: all var(--t) var(--ease);
}
.play-btn .ico { width: 22px; height: 22px; }
.play-btn:hover { border-color: var(--acid); color: var(--acid); }
.play-btn.is-playing {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--acid-ink);
  opacity: 1;
  transform: none;
}
.play-btn.is-muted { opacity: 0.9; transform: none; }
@media (hover: none) {
  .play-btn { opacity: 1; transform: none; }
}

/* reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ------------------------------------------------------------ 5) Header/Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: transparent;
  transition: background var(--t) var(--ease), border-color var(--t);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(11, 11, 13, 0.92);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s5);
  height: var(--header-h);
}
.brand { display: inline-flex; align-items: center; gap: 0.7rem; }
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  transition: border-color var(--t-fast);
}
.brand:hover .brand-mark { border-color: var(--acid); }
.brand-mark svg { width: 22px; height: 22px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-fa { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-en {
  font-family: var(--font-en);
  font-size: 0.66rem;
  letter-spacing: 0.34em;
  color: var(--acid);
}

.main-nav ul {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.2rem);
  list-style: none;
}
.main-nav a {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-dim);
  padding: 0.4rem 0;
  transition: color var(--t-fast);
}
.main-nav a::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background: var(--acid);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--t) var(--ease);
}
.main-nav a:hover { color: var(--ink); }
.main-nav a:hover::after { transform: scaleX(1); }
.main-nav a[aria-current="page"] { color: var(--ink); font-weight: 700; }
.main-nav a[aria-current="page"]::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 0.8rem; }
/* در موبایل، پنل منو روی هدر است — لوگو و دکمه‌ها باید از آن بالاتر باشند */
.brand,
.header-actions { position: relative; z-index: 56; }
.demo-chip {
  font-family: var(--font-en);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  border: 1px dashed var(--line-strong);
  padding: 0.35em 0.8em;
  border-radius: var(--r-sm);
}
.cart-btn {
  position: relative;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  color: var(--ink);
  transition: border-color var(--t-fast), color var(--t-fast);
}
.cart-btn:hover { border-color: var(--acid); color: var(--acid); }
.cart-btn .ico { width: 20px; height: 20px; }
.cart-badge {
  position: absolute;
  top: -7px;
  inset-inline-start: -7px;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: var(--r-pill);
  background: var(--acid);
  color: var(--acid-ink);
  font-size: 0.68rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  line-height: 1;
}
.cart-badge.bump { animation: bump 0.45s var(--ease); }
@keyframes bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.45); }
  100% { transform: scale(1); }
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  place-items: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--t) var(--ease), opacity var(--t);
}
body.nav-open .nav-toggle span:first-child { transform: translateY(3.5px) rotate(45deg); }
body.nav-open .nav-toggle span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* -------------------------------------------------------------- 6) Footer */
.site-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  padding-block: var(--s8) var(--s5);
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--s6);
  padding-bottom: var(--s7);
}
.footer-brand .brand { margin-bottom: var(--s3); }
.footer-brand p { color: var(--ink-dim); font-size: var(--fs-sm); max-width: 34ch; }
.footer-demo {
  display: inline-block;
  margin-top: var(--s3);
  font-size: var(--fs-xs);
  color: var(--acid);
  border: 1px dashed rgba(214, 255, 63, 0.45);
  padding: 0.5em 0.9em;
  border-radius: var(--r-sm);
}
.footer-col h3 {
  font-size: var(--fs-sm);
  color: var(--ink-faint);
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: var(--s3);
}
.footer-col ul { list-style: none; display: grid; gap: 0.55rem; }
.footer-col a {
  color: var(--ink-dim);
  font-size: 0.92rem;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--acid); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: var(--s4);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s3);
  color: var(--ink-faint);
  font-size: var(--fs-xs);
}
.footer-bottom strong { color: var(--ink-dim); font-weight: 500; }

/* ------------------------------------------------ 7) Player / Toast / Modal */
.player-bar {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  background: rgba(13, 13, 16, 0.97);
  border-top: 1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  transform: translateY(0);
  animation: slide-up var(--t) var(--ease);
}
.player-bar[hidden] { display: none; }
@keyframes slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
.player-inner {
  display: flex;
  align-items: center;
  gap: var(--s4);
  padding-block: 0.7rem;
}
.player-art {
  width: 46px;
  height: 46px;
  border-radius: var(--r-sm);
  object-fit: cover;
  border: 1px solid var(--line);
  flex: none;
}
.player-meta { min-width: 0; line-height: 1.35; }
.player-title { display: block; font-weight: 700; font-size: 0.92rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.player-sub { display: block; font-size: var(--fs-xs); color: var(--ink-dim); }
.player-state {
  font-size: var(--fs-xs);
  color: var(--acid);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.player-state::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--acid);
}
.player-toggle {
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--acid);
  color: var(--acid-ink);
  transition: transform var(--t-fast);
}
.player-toggle:hover { transform: scale(1.06); }
.player-toggle .ico { width: 20px; height: 20px; }
.player-seek {
  flex: 1;
  min-width: 80px;
  accent-color: var(--acid);
  height: 4px;
  cursor: pointer;
}
.player-time {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ink-dim);
  direction: ltr;
  unicode-bidi: embed;
}
.player-stop {
  width: 38px;
  height: 38px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--ink-dim);
  border: 1px solid transparent;
  transition: all var(--t-fast);
}
.player-stop:hover { color: var(--red); border-color: var(--line); }
.player-stop .ico { width: 16px; height: 16px; }

.toasts {
  position: fixed;
  top: calc(var(--header-h) + 14px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: min(92vw, 420px);
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-inline-start: 3px solid var(--acid);
  border-radius: var(--r-md);
  padding: 0.8rem 1rem;
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-1);
  opacity: 0;
  transform: translateY(-8px);
  transition: all var(--t) var(--ease);
}
.toast.is-in { opacity: 1; transform: none; }
.toast--warn { border-inline-start-color: var(--red); }
.toast__msg { flex: 1; }
.toast__close {
  color: var(--ink-faint);
  padding: 4px;
  border-radius: 4px;
  display: grid;
  place-items: center;
}
.toast__close:hover { color: var(--ink); }

.modal[hidden] { display: none; }
.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.2rem;
}
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 7, 0.78);
  backdrop-filter: blur(3px);
}
.modal__panel {
  position: relative;
  width: min(100%, 540px);
  max-height: min(86vh, 700px);
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  box-shadow: var(--shadow-2);
  transform: translateY(12px);
  opacity: 0;
  transition: all var(--t) var(--ease);
}
.modal.is-open .modal__panel { transform: none; opacity: 1; }
.modal__x {
  position: absolute;
  top: 14px;
  inset-inline-start: 14px;
  width: 38px;
  height: 38px;
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
  color: var(--ink-dim);
  border: 1px solid var(--line);
}
.modal__x:hover { color: var(--ink); border-color: var(--line-strong); }
.modal__x .ico { width: 15px; height: 15px; }
.modal h2 { font-size: 1.35rem; margin-top: 0.5rem; }
.modal .note {
  border: 1px dashed var(--line-strong);
  background: rgba(214, 255, 63, 0.05);
  border-radius: var(--r-md);
  padding: 0.9rem 1.1rem;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.modal .note strong { color: var(--acid); }
.modal-acts { display: flex; gap: 0.7rem; flex-wrap: wrap; margin-top: var(--s5); }
body.modal-open { overflow: hidden; }
body.player-on .site-footer { padding-bottom: calc(var(--s5) + 64px); }

/* ----------------------------------------------------------- 8) Home hero */
.hero {
  position: relative;
  padding-block: clamp(2.5rem, 6vw, 5rem) clamp(3rem, 7vw, 6rem);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -30%;
  inset-inline-start: -10%;
  width: 60vw;
  height: 70vh;
  background: radial-gradient(closest-side, rgba(214, 255, 63, 0.09), transparent 70%);
  pointer-events: none;
}
.hero__ghost {
  position: absolute;
  bottom: -2.5vw;
  inset-inline-end: -1vw;
  font-family: var(--font-en);
  font-size: clamp(5rem, 16vw, 15rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(244, 241, 234, 0.07);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--fs-sm);
  color: var(--acid);
  border: 1px solid rgba(214, 255, 63, 0.35);
  border-radius: var(--r-pill);
  padding: 0.4em 1.1em;
  margin-bottom: var(--s5);
}
.hero__kicker::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--acid);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hero h1 {
  font-size: var(--fs-display);
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin-bottom: var(--s4);
}
.hero h1 em {
  font-style: normal;
  position: relative;
  color: var(--acid);
}
.hero h1 em::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0.06em;
  height: 0.12em;
  background: rgba(214, 255, 63, 0.24);
  z-index: -1;
}
.hero__sub {
  color: var(--ink-dim);
  font-size: clamp(1rem, 1.4vw, 1.13rem);
  max-width: 54ch;
  margin-bottom: var(--s6);
}
.hero__en {
  font-family: var(--font-en);
  font-size: clamp(0.9rem, 1.5vw, 1.15rem);
  letter-spacing: 0.3em;
  color: var(--ink-faint);
  margin-bottom: var(--s5);
  direction: ltr;
}
.hero__ctas { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.hero__note {
  margin-top: var(--s5);
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero__note .ico { color: var(--acid); }

/* discovery console */
.disc {
  position: relative;
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
  box-shadow: var(--shadow-2);
}
.disc::after {
  content: "";
  position: absolute;
  top: -1px;
  inset-inline-end: 32px;
  width: 90px;
  height: 3px;
  background: var(--acid);
  border-radius: 0 0 4px 4px;
}
.disc__top {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 1.1rem;
  align-items: start;
}
.disc__art {
  position: relative;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 1;
}
.disc__art img { width: 100%; height: 100%; object-fit: cover; }
.disc__badge {
  position: absolute;
  top: 8px;
  inset-inline-start: 8px;
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  background: rgba(11, 11, 13, 0.8);
  border: 1px solid var(--line-strong);
  color: var(--acid);
  padding: 0.25em 0.6em;
  border-radius: var(--r-sm);
}
.disc__kicker {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  margin-bottom: 0.3rem;
}
.disc__title { font-size: clamp(1.3rem, 2.4vw, 1.75rem); margin-bottom: 0.1rem; }
.disc__en {
  font-family: var(--font-en);
  font-size: 0.78rem;
  letter-spacing: 0.26em;
  color: var(--acid);
  direction: ltr;
  text-align: right;
  margin-bottom: 0.7rem;
}
.disc__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.8rem;
}
.disc__meta li {
  font-size: var(--fs-xs);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 0.25em 0.7em;
  color: var(--ink-dim);
  background: rgba(11, 11, 13, 0.35);
}
.disc__mood { font-size: var(--fs-sm); color: var(--ink-dim); margin-bottom: 0; }

.disc__wave {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 54px;
  margin-block: 0.9rem;
  padding-inline: 2px;
  border-block: 1px solid var(--line);
}
.disc__wave i {
  flex: 1;
  height: var(--h, 40%);
  max-width: 5px;
  background: var(--line-strong);
  border-radius: 2px;
  transition: background var(--t);
}
.disc.is-active .disc__wave i { background: rgba(214, 255, 63, 0.55); }

.disc__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.disc__controls .btn { padding: 0.68em 1.15em; font-size: 0.88rem; }
.disc__price {
  margin-inline-start: auto;
  font-weight: 700;
  color: var(--acid);
  font-size: 1.02rem;
}
.disc__rail {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.55rem;
  margin-top: 1.1rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}
.rail-item {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--bg);
  transition: border-color var(--t-fast), transform var(--t-fast);
  aspect-ratio: 1;
}
.rail-item img { width: 100%; height: 100%; object-fit: cover; opacity: 0.75; transition: opacity var(--t-fast); }
.rail-item:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.rail-item:hover img { opacity: 1; }
.rail-item.is-active {
  border-color: var(--acid);
  box-shadow: 0 0 0 1px var(--acid);
}
.rail-item.is-active img { opacity: 1; }
.rail-item__now {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  font-size: 0.6rem;
  background: var(--acid);
  color: var(--acid-ink);
  font-weight: 700;
  text-align: center;
  padding: 0.15em 0;
  transform: translateY(100%);
  transition: transform var(--t) var(--ease);
}
.rail-item.is-playing .rail-item__now { transform: none; }
.rail-item:focus-visible { outline-offset: 2px; }

/* ticker strip */
.ticker {
  background: var(--acid);
  color: var(--acid-ink);
  overflow: hidden;
  padding-block: 0.55rem;
  border-block: 1px solid var(--acid);
  position: relative;
  z-index: 2;
  direction: ltr;
}
.ticker__track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: ticker 30s linear infinite;
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}
.ticker__track span { display: inline-flex; align-items: center; gap: 1.6rem; padding-inline-end: 1.6rem; }
.ticker__track b { font-family: var(--font-en); font-weight: 400; letter-spacing: 0.16em; }
.ticker__track em { font-style: normal; font-weight: 700; }
.ticker__track i { font-style: normal; opacity: 0.55; }
@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.ticker:hover .ticker__track { animation-play-state: paused; }

/* featured releases — editorial grid */
.releases-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: auto;
  gap: clamp(1rem, 2vw, 1.6rem);
}
.releases-grid .beat-card--lg { grid-column: span 2; grid-row: span 2; }
.releases-grid .beat-card--lg .beat-card__title { font-size: clamp(1.4rem, 2.4vw, 2rem); }
.releases-grid .beat-card--lg .beat-card__media { aspect-ratio: 1 / 1.06; }

/* beat card */
.beat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.beat-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.beat-card__media {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--surface-2);
}
.beat-card__imglink { display: block; height: 100%; }
.beat-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease);
}
.beat-card:hover .beat-card__media img { transform: scale(1.045); }
.beat-card__shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8, 8, 10, 0.55), transparent 45%);
  opacity: 0;
  transition: opacity var(--t);
  pointer-events: none;
}
.beat-card:hover .beat-card__shade { opacity: 1; }
.beat-card .tag { position: absolute; top: 10px; inset-inline-end: 10px; }
.beat-card__body { padding: 1.1rem 1.15rem 1.2rem; display: flex; flex-direction: column; gap: 0.55rem; flex: 1; }
.beat-card__head { display: flex; align-items: baseline; justify-content: space-between; gap: 0.6rem; }
.beat-card__title { font-size: 1.08rem; margin: 0; }
.beat-card__title a { transition: color var(--t-fast); }
.beat-card__title a:hover { color: var(--acid); }
.beat-card__en {
  font-family: var(--font-en);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  direction: ltr;
  flex: none;
}
.beat-card__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  font-size: var(--fs-xs);
  color: var(--ink-dim);
}
.beat-card__meta li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.beat-card__meta li + li::before {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--ink-faint);
  margin-inline-end: 0.45rem;
}
.beat-card__meta .mood { flex-basis: 100%; color: var(--ink-faint); }
.beat-card__foot {
  margin-top: auto;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}
.beat-card__acts { display: flex; align-items: center; gap: 0.5rem; }
.icon-link {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--ink-dim);
  transition: all var(--t-fast);
}
.icon-link:hover { border-color: var(--acid); color: var(--acid); }
.icon-link .ico { width: 16px; height: 16px; }

/* genre rows */
.genre-rows { border-top: 1px solid var(--line); }
.genre-row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 1.2rem;
  padding: clamp(1rem, 2.4vw, 1.6rem) 0.4rem;
  border-bottom: 1px solid var(--line);
  transition: background var(--t) var(--ease), padding var(--t) var(--ease);
}
.genre-row:hover { background: rgba(244, 241, 234, 0.03); padding-inline: 1rem; }
.genre-row__n {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ink-faint);
}
.genre-row__fa { font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 700; }
.genre-row__en {
  font-family: var(--font-en);
  font-size: clamp(1.4rem, 3.4vw, 2.6rem);
  letter-spacing: 0.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244, 241, 234, 0.35);
  transition: color var(--t) var(--ease), -webkit-text-stroke-color var(--t);
  direction: ltr;
}
.genre-row:hover .genre-row__en { color: var(--acid); -webkit-text-stroke-color: transparent; }
.genre-row__count { font-size: var(--fs-sm); color: var(--ink-dim); }
.genre-row__arrow {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: all var(--t);
  color: var(--ink-dim);
}
.genre-row:hover .genre-row__arrow {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--acid-ink);
  transform: rotate(-45deg);
}

/* about split (home) */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.split__media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
}
.split__media img { width: 100%; height: auto; }
.split__media::after {
  content: "MAHOR STUDIO";
  position: absolute;
  bottom: 12px;
  inset-inline-start: 14px;
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--acid);
  background: rgba(11, 11, 13, 0.75);
  padding: 0.4em 0.8em;
  border-radius: var(--r-sm);
}
.split h2 { margin-bottom: var(--s4); }
.split p { color: var(--ink-dim); }
.split .lead { color: var(--ink); font-size: 1.08rem; }
.stat-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  margin: var(--s5) 0;
  padding: var(--s4) 0;
  border-block: 1px solid var(--line);
}
.stat-strip div { min-width: 120px; }
.stat-strip b {
  display: block;
  font-family: var(--font-en);
  font-size: 1.6rem;
  color: var(--acid);
  font-weight: 400;
  letter-spacing: 0.04em;
}
.stat-strip span { font-size: var(--fs-xs); color: var(--ink-dim); }

/* tutorials list */
.tut-list { list-style: none; border-top: 1px solid var(--line); }
.tut-item a {
  display: grid;
  grid-template-columns: 3.2rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.15rem 0.3rem;
  border-bottom: 1px solid var(--line);
  transition: padding var(--t) var(--ease), background var(--t);
}
.tut-item a:hover { background: rgba(244, 241, 234, 0.03); padding-inline: 0.9rem; }
.tut-item__n {
  font-family: var(--font-en);
  font-size: 1.25rem;
  color: var(--acid);
}
.tut-item__title { font-weight: 700; font-size: 1.05rem; }
.tut-item__meta {
  display: block;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  margin-top: 0.15rem;
}
.tut-item__act {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 0.4em 1em;
  transition: all var(--t-fast);
}
.tut-item a:hover .tut-item__act { border-color: var(--acid); color: var(--acid); }

/* premium feature cards */
.feature-courses { display: grid; gap: clamp(1.2rem, 2.5vw, 1.8rem); }
.feature-course {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--t);
}
.feature-course:hover { border-color: var(--line-strong); }
.feature-course__media { position: relative; min-height: 240px; }
.feature-course__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.feature-course__media .tag { position: absolute; top: 12px; inset-inline-end: 12px; }
.feature-course__body { padding: clamp(1.3rem, 3vw, 2.2rem); display: flex; flex-direction: column; gap: 0.7rem; }
.feature-course__body h3 { font-size: clamp(1.25rem, 2.2vw, 1.7rem); margin: 0; }
.feature-course__body p { color: var(--ink-dim); margin: 0; }
.feature-course__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
}
.feature-course__meta li { list-style: none; display: inline-flex; gap: 0.4rem; align-items: center; }
.feature-course__foot {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* final CTA */
.cta-band {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: clamp(2rem, 6vw, 4.5rem);
  overflow: hidden;
  text-align: center;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 90% at 50% 120%, rgba(214, 255, 63, 0.14), transparent 70%);
  pointer-events: none;
}
.cta-band h2 { font-size: clamp(1.7rem, 4vw, 3rem); position: relative; }
.cta-band .font-en {
  display: block;
  font-size: clamp(0.85rem, 1.6vw, 1.1rem);
  letter-spacing: 0.4em;
  color: var(--ink-faint);
  margin-bottom: var(--s3);
}
.cta-band p { color: var(--ink-dim); max-width: 56ch; margin-inline: auto; position: relative; }
.cta-band__acts {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: var(--s5);
  position: relative;
}

/* --------------------------------------------------------- 9) Store page */
.page-head {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(1.2rem, 3vw, 2rem);
  position: relative;
  overflow: hidden;
}
.page-head__ghost {
  position: absolute;
  top: -0.2em;
  inset-inline-end: 0;
  font-family: var(--font-en);
  font-size: clamp(4rem, 12vw, 9rem);
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(244, 241, 234, 0.06);
  pointer-events: none;
  direction: ltr;
  white-space: nowrap;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  margin-bottom: var(--s3);
}
.breadcrumb a:hover { color: var(--acid); }
.breadcrumb li + li::before {
  content: "›";
  margin-inline-end: 0.5rem;
  color: var(--ink-faint);
}
.page-head h1 { margin-bottom: 0.4rem; }
.page-head p { color: var(--ink-dim); max-width: 62ch; margin: 0; }

/* toolbar */
.toolbar {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  background: rgba(11, 11, 13, 0.94);
  backdrop-filter: blur(10px);
  border-block: 1px solid var(--line);
  padding-block: 0.85rem;
}
.toolbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
}
.toolbar .field { flex: 1 1 240px; max-width: 340px; min-height: 46px; }
.toolbar__count {
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  margin-inline-start: auto;
  white-space: nowrap;
}
.toolbar__count b { color: var(--acid); font-weight: 700; }
.toolbar__sep {
  width: 1px;
  height: 30px;
  background: var(--line);
}

/* catalog grid */
.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}
.catalog .beat-card--lg { grid-column: span 2; }

/* empty state */
.empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: clamp(3rem, 8vw, 5.5rem) 1rem;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-lg);
}
.empty__en {
  font-family: var(--font-en);
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(214, 255, 63, 0.5);
  line-height: 1;
  margin-bottom: var(--s3);
  direction: ltr;
}
.empty h2 { font-size: 1.3rem; }
.empty p { color: var(--ink-dim); max-width: 46ch; margin-inline: auto; }

/* ------------------------------------------------------- 10) Beat detail */
.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(1.8rem, 4vw, 3.5rem);
  align-items: start;
  padding-block: clamp(1.5rem, 4vw, 3rem) var(--sec-y);
}
.detail-art {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  position: sticky;
  top: calc(var(--header-h) + 20px);
}
.detail-art img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.detail-art .play-btn {
  opacity: 1;
  transform: none;
  width: 64px;
  height: 64px;
  inset-block-end: 18px;
  inset-inline-start: 18px;
}
.detail-art .play-btn .ico { width: 26px; height: 26px; }
.detail-art__tag { position: absolute; top: 14px; inset-inline-end: 14px; }
.detail-wave { padding: 0.9rem 1rem; border-top: 1px solid var(--line); }
.detail-info__id {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--acid);
  letter-spacing: 0.1em;
  direction: ltr;
  text-align: right;
  margin-bottom: 0.6rem;
}
.detail-info h1 { margin-bottom: 0.15rem; }
.detail-info__en {
  font-family: var(--font-en);
  font-size: clamp(1rem, 2vw, 1.3rem);
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  direction: ltr;
  text-align: right;
  margin-bottom: var(--s4);
}
.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: var(--s5);
  background: var(--surface);
}
.meta-grid > div {
  padding: 0.85rem 1rem;
  border-inline-start: 1px solid var(--line);
}
.meta-grid > div:first-child { border-inline-start: 0; }
.meta-grid dt {
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  margin-bottom: 0.15rem;
}
.meta-grid dd { margin: 0; font-weight: 700; font-size: 0.98rem; }
.detail-desc { color: var(--ink-dim); margin-bottom: var(--s5); }

.license-box { border-top: 1px solid var(--line); padding-top: var(--s5); }
.license-box > legend, .license-box h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.3rem; padding: 0; }
.license-box .hint { font-size: var(--fs-xs); color: var(--ink-faint); margin-bottom: var(--s4); }
.license-list { display: grid; gap: 0.7rem; }
.license-opt { position: relative; }
.license-opt input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}
.license-opt label {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.8rem 1rem;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--r-md);
  padding: 1rem 1.1rem;
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.license-opt label:hover { border-color: var(--line-strong); }
.license-opt input:focus-visible + label { outline: 2px solid var(--acid); outline-offset: 2px; }
.license-opt input:checked + label {
  border-color: var(--acid);
  background: rgba(214, 255, 63, 0.05);
}
.license-opt__radio {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  display: grid;
  place-items: center;
  grid-row: span 2;
}
.license-opt__radio::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--acid);
  transform: scale(0);
  transition: transform var(--t-fast) var(--ease);
}
.license-opt input:checked + label .license-opt__radio::after { transform: scale(1); }
.license-opt__name { font-weight: 700; }
.license-opt__en { font-family: var(--font-en); font-size: 0.62rem; letter-spacing: 0.14em; color: var(--ink-faint); display: block; }
.license-opt__price { font-weight: 700; color: var(--acid); white-space: nowrap; }
.license-opt__perks {
  grid-column: 2 / -1;
  list-style: none;
  display: grid;
  gap: 0.3rem;
  font-size: var(--fs-xs);
  color: var(--ink-dim);
}
.license-opt__perks li { display: flex; gap: 0.45rem; align-items: baseline; }
.license-opt__perks li::before { content: "✓"; color: var(--acid); font-weight: 700; }

.buy-row {
  margin-top: var(--s5);
  padding: 1.2rem;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.buy-row__price { line-height: 1.2; }
.buy-row__price small { display: block; font-size: var(--fs-xs); color: var(--ink-faint); }
.buy-row__price b { font-size: clamp(1.3rem, 3vw, 1.7rem); color: var(--acid); font-weight: 700; }
.buy-row .btn { flex: 1 1 200px; }
.demo-inline {
  width: 100%;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  display: flex;
  gap: 0.45rem;
  align-items: baseline;
}
.demo-inline .ico { color: var(--acid); flex: none; }

/* ------------------------------------------------------------ 11) Academy */
.tabs-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--s5);
}
.tabs-bar .chips { flex: 1; }
.academy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(275px, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

/* course card */
.course-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--t), transform var(--t) var(--ease);
}
.course-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.course-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--surface-2);
}
.course-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow) var(--ease); }
.course-card:hover .course-card__media img { transform: scale(1.05); }
.course-card__media .tag { position: absolute; top: 10px; inset-inline-end: 10px; }
.course-card__body { padding: 1.15rem; display: flex; flex-direction: column; gap: 0.55rem; flex: 1; }
.course-card__kicker {
  display: flex;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  color: var(--acid);
}
.course-card__title { font-size: 1.12rem; margin: 0; }
.course-card__title a:hover { color: var(--acid); }
.course-card__short {
  color: var(--ink-dim);
  font-size: var(--fs-sm);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course-card__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
}
.course-card__meta li { display: inline-flex; align-items: center; gap: 0.4rem; }
.course-card__foot {
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}
.course-card[data-tier="premium"] { border-color: rgba(214, 255, 63, 0.28); }

/* -------------------------------------------------------- 12) Course page */
.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr);
  gap: clamp(1.8rem, 4vw, 3.2rem);
  align-items: start;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) var(--sec-y);
}
.course-hero__media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  margin-bottom: var(--s5);
}
.course-hero__media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.course-hero__media .tag { position: absolute; top: 14px; inset-inline-end: 14px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--s3); }
.badge {
  font-size: var(--fs-xs);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  padding: 0.3em 0.9em;
  color: var(--ink-dim);
}
.badge--acid { border-color: rgba(214, 255, 63, 0.5); color: var(--acid); }
.instructor {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-block: var(--s5);
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.instructor__mono {
  width: 52px;
  height: 52px;
  flex: none;
  border-radius: 50%;
  background: var(--surface-3);
  border: 1px solid var(--line-strong);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--acid);
}
.instructor b { display: block; }
.instructor span { font-size: var(--fs-xs); color: var(--ink-dim); }

.outcomes { list-style: none; display: grid; gap: 0.6rem; margin: var(--s4) 0 var(--s6); }
.outcomes li {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  color: var(--ink-dim);
}
.outcomes .ico { color: var(--acid); flex: none; margin-top: 0.35em; }

.curriculum { border-top: 1px solid var(--line); }
.curr-item { border-bottom: 1px solid var(--line); }
.curr-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.05rem 0.3rem;
  cursor: pointer;
  transition: background var(--t-fast);
}
.curr-item summary::-webkit-details-marker { display: none; }
.curr-item summary:hover { background: rgba(244, 241, 234, 0.03); }
.curr-item__n {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  width: 2rem;
  flex: none;
}
.curr-item__t { flex: 1; font-weight: 500; }
.curr-item__d { font-size: var(--fs-xs); color: var(--ink-faint); white-space: nowrap; }
.curr-item__state {
  width: 34px;
  height: 34px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink-dim);
  transition: all var(--t-fast);
}
.curr-item summary:hover .curr-item__state { border-color: var(--acid); color: var(--acid); }
.curr-item__body {
  padding: 0 0.3rem 1.2rem 3.3rem;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.curr-item__body p { margin-bottom: 0.7rem; }
.curr-item__body .btn { margin-top: 0.3rem; }

.course-aside {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: clamp(1.3rem, 3vw, 1.8rem);
  box-shadow: var(--shadow-1);
}
.course-aside__price {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: var(--s3);
}
.course-aside__price b { font-size: 1.8rem; color: var(--acid); }
.course-aside__price s { color: var(--ink-faint); font-size: var(--fs-sm); }
.course-aside ul.facts {
  list-style: none;
  display: grid;
  gap: 0.55rem;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
  padding-top: var(--s4);
  margin-top: var(--s4);
}
.course-aside ul.facts li { display: flex; justify-content: space-between; gap: 1rem; }
.course-aside ul.facts b { color: var(--ink); font-weight: 500; }
.course-aside .btn { margin-top: var(--s4); }
.course-aside .demo-inline { margin-top: var(--s3); }

/* --------------------------------------------------------- 13) Lesson page */
.lesson-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(1.8rem, 4vw, 3rem);
  align-items: start;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) var(--sec-y);
}
.lesson-kicker {
  font-size: var(--fs-sm);
  color: var(--acid);
  margin-bottom: 0.5rem;
}
.mock-player {
  position: relative;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(70% 90% at 50% 110%, rgba(214, 255, 63, 0.08), transparent 65%),
    var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
  margin-block: var(--s5);
  padding: 1.5rem;
}
.mock-player__ring {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  display: grid;
  place-items: center;
  margin: 0 auto 1rem;
  color: var(--acid);
}
.mock-player__ring .ico { width: 34px; height: 34px; }
.mock-player__label {
  font-size: var(--fs-sm);
  color: var(--ink);
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.mock-player__hint { font-size: var(--fs-xs); color: var(--ink-faint); max-width: 44ch; margin-inline: auto; }
.mock-player__wave {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 44px;
  display: flex;
  align-items: flex-end;
  gap: 3px;
  padding: 0 1rem;
  opacity: 0.35;
}
.mock-player__wave i { flex: 1; background: var(--line-strong); height: var(--h, 30%); border-radius: 2px 2px 0 0; }
.mock-player .tag { position: absolute; top: 12px; inset-inline-start: 12px; }

.lesson-body { max-width: 68ch; }
.lesson-body h2 { font-size: 1.35rem; margin-top: 1.8rem; }
.lesson-body p { color: var(--ink-dim); }
.lesson-body ul { padding-inline-start: 1.2rem; display: grid; gap: 0.45rem; color: var(--ink-dim); }
.lesson-body li::marker { color: var(--acid); }
.lesson-note {
  border: 1px dashed var(--line-strong);
  background: rgba(214, 255, 63, 0.045);
  border-radius: var(--r-md);
  padding: 1rem 1.2rem;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  margin-block: 1.4rem;
  border-inline-start: 3px solid var(--acid);
}
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: var(--s6);
  padding-top: var(--s5);
  border-top: 1px solid var(--line);
}
.lesson-nav a { max-width: 48%; }
.lesson-nav small { display: block; font-size: var(--fs-xs); color: var(--ink-faint); margin-bottom: 0.2rem; }
.lesson-nav b { font-weight: 500; font-size: 0.95rem; }
.lesson-nav a:hover b { color: var(--acid); }
.lesson-nav .next { text-align: left; margin-inline-start: auto; }

.lesson-side {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.lesson-side__head {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-sm);
  font-weight: 700;
}
.lesson-side__head small { display: block; font-weight: 400; color: var(--ink-faint); font-size: var(--fs-xs); margin-top: 0.15rem; }
.lesson-side ol { list-style: none; }
.lesson-side li + li { border-top: 1px solid var(--line); }
.lesson-side a, .lesson-side .locked-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1.1rem;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  transition: background var(--t-fast), color var(--t-fast);
}
.lesson-side a:hover { background: rgba(244, 241, 234, 0.04); color: var(--ink); }
.lesson-side a[aria-current="page"] {
  background: rgba(214, 255, 63, 0.07);
  color: var(--ink);
  font-weight: 700;
  border-inline-start: 3px solid var(--acid);
}
.lesson-side .num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  flex: none;
}
.lesson-side .ico { color: var(--ink-faint); flex: none; }
.lesson-side .free-flag {
  margin-inline-start: auto;
  font-size: 0.62rem;
  color: var(--acid);
  flex: none;
}

.lock-panel {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  border-radius: var(--r-lg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  text-align: center;
  margin-block: var(--s5);
}
.lock-panel__ring {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(214, 255, 63, 0.08);
  border: 1px solid rgba(214, 255, 63, 0.4);
  display: grid;
  place-items: center;
  margin: 0 auto var(--s4);
  color: var(--acid);
}
.lock-panel__ring .ico { width: 30px; height: 30px; }
.lock-panel p { color: var(--ink-dim); max-width: 52ch; margin-inline: auto; }
.lock-panel .modal-acts { justify-content: center; }

/* ----------------------------------------------------------- 14) About page */
.about-hero { padding-block: clamp(3rem, 8vw, 6rem) var(--sec-y); position: relative; overflow: hidden; }
.about-hero__en {
  font-family: var(--font-en);
  font-size: clamp(3rem, 11vw, 8.5rem);
  line-height: 0.95;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(244, 241, 234, 0.16);
  direction: ltr;
  text-align: right;
  margin-bottom: var(--s5);
}
.about-hero h1 { font-size: clamp(1.9rem, 4.5vw, 3.4rem); max-width: 22ch; }
.about-hero h1 em { font-style: normal; color: var(--acid); }
.about-hero p { color: var(--ink-dim); max-width: 62ch; font-size: 1.08rem; }

.pullquote {
  border-block: 1px solid var(--line);
  padding-block: var(--s6);
  margin-block: var(--s6);
}
.pullquote p {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.7;
  color: var(--ink);
  max-width: 30ch;
}
.pullquote p::before { content: "«"; color: var(--acid); margin-inline-end: 0.2rem; }
.pullquote p::after { content: "»"; color: var(--acid); margin-inline-start: 0.2rem; }

.steps { list-style: none; counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.5rem;
  padding-block: var(--s5);
  border-bottom: 1px solid var(--line);
}
.step:first-child { border-top: 1px solid var(--line); }
.step__n {
  font-family: var(--font-en);
  font-size: 2rem;
  color: transparent;
  -webkit-text-stroke: 1px var(--acid);
  line-height: 1;
}
.step h3 { margin-bottom: 0.35rem; }
.step p { color: var(--ink-dim); margin: 0; max-width: 62ch; }

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.value-grid > div { padding: clamp(1.3rem, 3vw, 2rem); border-inline-start: 1px solid var(--line); }
.value-grid > div:first-child { border-inline-start: 0; }
.value-grid b {
  font-family: var(--font-en);
  color: var(--acid);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 0.7rem;
}
.value-grid h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.value-grid p { font-size: var(--fs-sm); color: var(--ink-dim); margin: 0; }

.disclaimer-band {
  background: var(--surface);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-lg);
  padding: clamp(1.3rem, 3vw, 2rem);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.disclaimer-band .ico { color: var(--acid); flex: none; margin-top: 0.3em; }
.disclaimer-band strong { color: var(--ink); }

/* -------------------------------------------------------------- 15) Cart */
.cart-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(1.8rem, 4vw, 3rem);
  align-items: start;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) var(--sec-y);
}
.cart-lines { display: grid; gap: 1rem; }
.cart-line {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: 1.1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1rem;
  align-items: center;
}
.cart-line__art {
  width: 92px;
  height: 92px;
  border-radius: var(--r-sm);
  object-fit: cover;
  border: 1px solid var(--line);
}
.cart-line__title { font-size: 1.05rem; margin-bottom: 0.15rem; }
.cart-line__title a:hover { color: var(--acid); }
.cart-line__sub { font-size: var(--fs-xs); color: var(--ink-faint); margin-bottom: 0.6rem; }
.cart-line__controls { display: flex; flex-wrap: wrap; align-items: center; gap: 0.8rem; }
.cart-line__controls .sel { padding: 0.4em 2.2rem 0.4em 0.8em; padding-inline-start: 2.2rem; min-height: 38px; font-size: var(--fs-xs); }
.qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}
.qty button {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--ink-dim);
  transition: background var(--t-fast), color var(--t-fast);
}
.qty button:hover { background: var(--surface-3); color: var(--acid); }
.qty output { min-width: 34px; text-align: center; font-weight: 700; font-size: 0.95rem; }
.qty--static { opacity: 0.7; pointer-events: none; }
.cart-line__end { text-align: left; display: grid; gap: 0.55rem; justify-items: end; }
.cart-line__total { font-weight: 700; color: var(--acid); font-size: 1.05rem; }
.cart-line__unit { font-size: var(--fs-xs); color: var(--ink-faint); }
.rm-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 0.35em 0.9em;
  transition: all var(--t-fast);
}
.rm-btn:hover { color: var(--red); border-color: var(--red); }
.rm-btn .ico { width: 13px; height: 13px; }

.cart-summary {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: clamp(1.3rem, 3vw, 1.8rem);
}
.cart-summary h2 { font-size: 1.2rem; }
.sum-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.7rem;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.sum-row--total {
  border-bottom: 0;
  padding-top: 1rem;
  font-size: 1.05rem;
  color: var(--ink);
  font-weight: 700;
}
.sum-row--total b { color: var(--acid); font-size: 1.35rem; }
.cart-summary .btn { margin-top: var(--s4); }
.cart-summary .note {
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  margin-top: var(--s3);
  display: flex;
  gap: 0.45rem;
  align-items: baseline;
}
.cart-summary .note .ico { color: var(--acid); flex: none; }
.link-danger {
  display: block;
  margin-top: var(--s3);
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  text-align: center;
  transition: color var(--t-fast);
}
.link-danger:hover { color: var(--red); }

/* ------------------------------------------------------- 16) Motion prefs */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .ticker__track { animation: none; width: auto; }
  .hero__kicker::before { animation: none; }
}

/* ------------------------------------------------------- 17) Responsive */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .releases-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .releases-grid .beat-card--lg { grid-column: span 2; grid-row: auto; }
  .catalog .beat-card--lg { grid-column: span 2; }
}

@media (max-width: 900px) {
  :root { --header-h: 62px; }
  .nav-toggle { display: grid; }
  .demo-chip { display: none; }
  .main-nav {
    position: fixed;
    inset: 0;
    z-index: var(--z-nav);
    background: rgba(9, 9, 11, 0.985);
    padding: calc(var(--header-h) + 2.2rem) 1.6rem 2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--t) var(--ease);
    overflow: auto;
  }
  body.nav-open .main-nav { opacity: 1; visibility: visible; transform: none; }
  body.nav-open #site-header { background: transparent; border-color: transparent; }
  body.nav-open { overflow: hidden; }
  .main-nav ul { flex-direction: column; gap: 0.4rem; }
  .main-nav a {
    font-size: clamp(1.7rem, 7vw, 2.4rem);
    font-weight: 700;
    color: var(--ink);
    display: block;
    padding: 0.55rem 0;
    border-bottom: 1px solid var(--line);
  }
  .main-nav a::after { display: none; }
  .main-nav .nav-extra {
    margin-top: var(--s6);
    color: var(--ink-faint);
    font-size: var(--fs-sm);
    display: block;
    border: 0;
  }

  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .hero__ghost { font-size: clamp(4rem, 22vw, 9rem); opacity: 0.7; }
  .split { grid-template-columns: minmax(0, 1fr); }
  .split__media { max-width: 480px; }
  .feature-course { grid-template-columns: minmax(0, 1fr); }
  .feature-course__media { min-height: 0; aspect-ratio: 16 / 7; }
  .detail-grid { grid-template-columns: minmax(0, 1fr); }
  .detail-art { position: static; max-width: 560px; }
  .course-hero { grid-template-columns: minmax(0, 1fr); }
  .course-aside { position: static; }
  .lesson-grid { grid-template-columns: minmax(0, 1fr); }
  .lesson-side { position: static; order: -1; }
  .cart-grid { grid-template-columns: minmax(0, 1fr); }
  .cart-summary { position: static; }
  .value-grid { grid-template-columns: minmax(0, 1fr); }
  .value-grid > div { border-inline-start: 0; border-top: 1px solid var(--line); }
  .value-grid > div:first-child { border-top: 0; }
}

@media (max-width: 720px) {
  .container { width: min(100% - 1.8rem, var(--container)); }
  .section-head { flex-direction: column; align-items: flex-start; gap: var(--s3); }
  .disc__top { grid-template-columns: 116px 1fr; }
  .disc__rail { grid-template-columns: repeat(5, 1fr); gap: 0.4rem; }
  .disc__price { margin-inline-start: 0; width: 100%; }
  .disc__controls .btn { flex: 1; }
  .releases-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .releases-grid .beat-card--lg { grid-column: span 2; }
  .genre-row { grid-template-columns: 2.2rem 1fr auto; gap: 0.8rem; }
  .genre-row__count { display: none; }
  .toolbar { position: static; }
  .toolbar .field { max-width: none; flex-basis: 100%; }
  .toolbar__sep { display: none; }
  .toolbar__count { margin-inline-start: 0; }
  .cart-line { grid-template-columns: 72px minmax(0, 1fr); }
  .cart-line__art { width: 72px; height: 72px; }
  .cart-line__end {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: space-between;
    display: flex;
    align-items: center;
    border-top: 1px solid var(--line);
    padding-top: 0.7rem;
  }
  .step { grid-template-columns: 3rem 1fr; gap: 1rem; }
  .lesson-nav { flex-direction: column; }
  .lesson-nav a, .lesson-nav .next { max-width: none; text-align: right; margin: 0; }
  .player-time { display: none; }
}

@media (max-width: 520px) {
  .brand-en { display: none; }
  .hero h1 { font-size: clamp(2.3rem, 10.5vw, 3rem); }
  .hero__ctas .btn { flex: 1 1 100%; }
  .disc__top { grid-template-columns: 1fr; }
  .disc__art { max-width: 220px; }
  .releases-grid { grid-template-columns: 1fr; }
  .releases-grid .beat-card--lg { grid-column: auto; }
  .catalog { grid-template-columns: 1fr; }
  .catalog .beat-card--lg { grid-column: auto; }
  .academy-grid { grid-template-columns: 1fr; }
  .tut-item a { grid-template-columns: 2.4rem 1fr; }
  .tut-item__act { display: none; }
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .meta-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .meta-grid > div { border-inline-start: 0; border-top: 1px solid var(--line); }
  .meta-grid > div:nth-child(-n + 2) { border-top: 0; }
  .meta-grid > div:nth-child(even) { border-inline-start: 1px solid var(--line); }
  .buy-row { flex-direction: column; align-items: stretch; }
  .player-meta .player-sub { display: none; }
  .player-inner { gap: 0.7rem; }
  .empty__en { font-size: 2.4rem; }
}

@media (min-width: 901px) {
  .main-nav { display: block !important; opacity: 1 !important; visibility: visible !important; transform: none !important; }
  body.nav-open { overflow: auto; }
}

/* بلندخوانی چاپی/افکت‌های کم‌اهمیت */
@media (hover: hover) and (pointer: fine) {
  .beat-card:hover .play-btn { opacity: 1; transform: none; }
}