/* =========================================================
   BeatForge Studio — Design System
   ========================================================= */
:root {
  --bg-0: #07070d;
  --bg-1: #0d0d18;
  --bg-2: #141424;
  --bg-3: #1c1c31;
  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.12);
  --glass: rgba(22, 22, 40, 0.55);
  --glass-2: rgba(30, 30, 54, 0.7);

  --txt-0: #f4f3ff;
  --txt-1: #c9c7e4;
  --txt-2: #8e8bb0;
  --txt-3: #5d5a80;

  --violet: hsl(258, 90%, 72%);
  --violet-d: hsl(258, 70%, 55%);
  --cyan: hsl(188, 86%, 53%);
  --pink: hsl(326, 85%, 64%);
  --amber: hsl(38, 95%, 60%);
  --mint: hsl(158, 70%, 52%);
  --rose: hsl(352, 85%, 62%);

  --grad-main: linear-gradient(135deg, var(--violet) 0%, var(--cyan) 100%);
  --grad-hot: linear-gradient(135deg, var(--pink) 0%, var(--amber) 100%);
  --grad-cool: linear-gradient(135deg, var(--cyan) 0%, var(--mint) 100%);

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;

  --shadow-1: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 0 1px rgba(167, 139, 250, 0.25), 0 10px 40px -10px rgba(167, 139, 250, 0.45);

  --font: "Outfit", "Noto Sans Thai", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --sidebar-w: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg-0);
  color: var(--txt-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: rgba(167, 139, 250, 0.35); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 10px; border: 2px solid var(--bg-0); }
::-webkit-scrollbar-track { background: transparent; }

/* ---------- Background orbs ---------- */
.bg-orbs { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.35; animation: float 22s var(--ease) infinite alternate; }
.orb-1 { width: 520px; height: 520px; background: var(--violet-d); top: -160px; left: 10%; }
.orb-2 { width: 460px; height: 460px; background: hsl(188, 80%, 35%); bottom: -180px; right: 5%; animation-delay: -6s; }
.orb-3 { width: 340px; height: 340px; background: hsl(326, 70%, 40%); top: 40%; left: 55%; opacity: 0.2; animation-delay: -12s; }
@keyframes float { to { transform: translate(60px, 40px) scale(1.1); } }

/* ---------- Layout ---------- */
.app-shell { position: relative; z-index: 1; display: flex; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; width: var(--sidebar-w); flex-shrink: 0;
  display: flex; flex-direction: column; gap: 18px; padding: 22px 16px;
  background: rgba(10, 10, 20, 0.7); backdrop-filter: blur(18px);
  border-right: 1px solid var(--line);
  transition: transform 0.35s var(--ease);
}
.brand { display: flex; align-items: center; gap: 12px; padding: 4px 8px 14px; }
.brand-mark { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; background: var(--bg-2); border: 1px solid var(--line-2); box-shadow: var(--shadow-glow); }
.brand-text { font-weight: 800; font-size: 20px; letter-spacing: -0.02em; line-height: 1.05; display: flex; flex-direction: column; }
.brand-text small { font-size: 10px; letter-spacing: 0.38em; color: var(--txt-2); font-weight: 600; }

.nav { display: flex; flex-direction: column; gap: 4px; }
.nav-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--txt-3); padding: 16px 12px 6px; }
.nav-link {
  position: relative; display: flex; align-items: center; gap: 12px;
  padding: 11px 12px; border-radius: var(--r-md); color: var(--txt-1); font-weight: 500; font-size: 14.5px;
  transition: background 0.2s, color 0.2s, transform 0.2s var(--ease);
}
.nav-link:hover { background: rgba(255, 255, 255, 0.04); color: var(--txt-0); transform: translateX(3px); }
.nav-link.active { background: linear-gradient(90deg, rgba(167, 139, 250, 0.18), rgba(34, 211, 238, 0.06)); color: #fff; }
.nav-link.active::before { content: ""; position: absolute; left: -16px; top: 20%; bottom: 20%; width: 3px; border-radius: 3px; background: var(--grad-main); }
.nav-ico { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 8px; background: var(--bg-2); font-size: 14px; border: 1px solid var(--line); }
.nav-link.active .nav-ico { background: var(--grad-main); color: #0b0b14; border-color: transparent; }
.nav-badge { margin-left: auto; font-style: normal; font-size: 10px; font-weight: 700; padding: 2px 7px; border-radius: 99px; background: var(--grad-hot); color: #1a0b12; }
.sidebar-foot { margin-top: auto; font-size: 12px; color: var(--txt-3); display: flex; align-items: center; gap: 8px; padding: 0 12px; }
.dot-live { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 10px var(--mint); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: 0.4; } }

.main-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 14px;
  padding: 14px 32px; background: rgba(7, 7, 13, 0.6); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line);
}
.topbar-title { font-weight: 600; font-size: 15px; color: var(--txt-1); }
.topbar-actions { margin-left: auto; display: flex; gap: 8px; }
.menu-toggle { display: none; }

.page { padding: 32px; max-width: 1280px; width: 100%; margin: 0 auto; outline: none; animation: pageIn 0.5s var(--ease); }
@keyframes pageIn { from { opacity: 0; transform: translateY(14px); } }

/* ---------- Typography ---------- */
.page-head { margin-bottom: 28px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--cyan); font-weight: 600; margin-bottom: 10px; }
h1.title { font-size: clamp(28px, 4vw, 44px); font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; }
.grad-text { background: var(--grad-main); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-hot-text { background: var(--grad-hot); -webkit-background-clip: text; background-clip: text; color: transparent; }
.subtitle { color: var(--txt-2); margin-top: 10px; max-width: 720px; font-size: 15.5px; }
h2.section-title { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
h3 { font-size: 16px; font-weight: 600; }
.muted { color: var(--txt-2); }
.mono { font-family: var(--mono); }
.small { font-size: 13px; }

/* ---------- Cards ---------- */
.card {
  position: relative; background: var(--glass); backdrop-filter: blur(16px);
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 24px;
  box-shadow: var(--shadow-1);
}
.card + .card { margin-top: 20px; }
.card-glow::after {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.5), transparent 40%, transparent 60%, rgba(34, 211, 238, 0.4));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
}
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.spacer { flex: 1; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 36px; }

/* ---------- Form controls ---------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.label { font-size: 12.5px; font-weight: 600; color: var(--txt-2); letter-spacing: 0.04em; text-transform: uppercase; }
.input, .select, .textarea {
  width: 100%; background: rgba(8, 8, 16, 0.6); border: 1px solid var(--line-2); border-radius: var(--r-md);
  padding: 12px 14px; font-size: 15px; transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--violet); box-shadow: 0 0 0 4px rgba(167, 139, 250, 0.15); background: rgba(8, 8, 16, 0.85); }
.textarea { min-height: 120px; resize: vertical; line-height: 1.6; }
.select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--txt-2) 50%), linear-gradient(135deg, var(--txt-2) 50%, transparent 50%); background-position: calc(100% - 20px) 52%, calc(100% - 15px) 52%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 38px; }
.select option { background: var(--bg-2); }
.input-xl { font-size: 32px; font-weight: 700; text-align: center; font-family: var(--mono); padding: 18px; letter-spacing: 0.02em; }

/* Segmented / pill selectors */
.seg { display: inline-flex; flex-wrap: wrap; gap: 6px; padding: 5px; background: rgba(8, 8, 16, 0.6); border: 1px solid var(--line); border-radius: var(--r-md); }
.seg button {
  border: 0; background: transparent; padding: 8px 14px; border-radius: 10px; font-size: 13.5px; font-weight: 600; color: var(--txt-2); cursor: pointer;
  transition: all 0.2s var(--ease);
}
.seg button:hover { color: var(--txt-0); background: rgba(255, 255, 255, 0.04); }
.seg button.on { background: var(--grad-main); color: #0b0b14; box-shadow: 0 6px 20px -6px rgba(167, 139, 250, 0.6); }
.seg.seg-hot button.on { background: var(--grad-hot); color: #1a0b12; }
.seg.seg-cool button.on { background: var(--grad-cool); color: #04161a; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px; cursor: pointer;
  border: 1px solid var(--line-2); background: var(--bg-2); color: var(--txt-0);
  padding: 11px 18px; border-radius: var(--r-md); font-weight: 600; font-size: 14.5px;
  transition: transform 0.15s var(--ease), box-shadow 0.25s, background 0.2s, border-color 0.2s, opacity 0.2s;
}
.btn:hover { transform: translateY(-2px); border-color: rgba(167, 139, 250, 0.5); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--grad-main); color: #0b0b14; border: 0; box-shadow: 0 10px 30px -10px rgba(167, 139, 250, 0.7); }
.btn-primary:hover { box-shadow: 0 14px 40px -10px rgba(34, 211, 238, 0.7); }
.btn-hot { background: var(--grad-hot); color: #1a0b12; border: 0; box-shadow: 0 10px 30px -10px rgba(236, 72, 153, 0.6); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 10px; }
.btn-lg { padding: 15px 26px; font-size: 16px; border-radius: var(--r-lg); }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; background: var(--bg-2); border: 1px solid var(--line); cursor: pointer; }

.chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 99px; font-size: 12.5px; font-weight: 600; background: rgba(167, 139, 250, 0.14); color: var(--violet); border: 1px solid rgba(167, 139, 250, 0.25); }
.chip-ghost { background: rgba(255, 255, 255, 0.04); color: var(--txt-2); border-color: var(--line); }
.chip-ok { background: rgba(52, 211, 153, 0.12); color: var(--mint); border-color: rgba(52, 211, 153, 0.3); }
.chip-warn { background: rgba(251, 191, 36, 0.12); color: var(--amber); border-color: rgba(251, 191, 36, 0.3); }
.chip-err { background: rgba(244, 63, 94, 0.12); color: var(--rose); border-color: rgba(244, 63, 94, 0.3); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--r-md); border: 1px solid var(--line); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.tbl th { text-align: left; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--txt-2); font-weight: 600; padding: 14px 18px; background: rgba(8, 8, 16, 0.6); border-bottom: 1px solid var(--line); }
.tbl td { padding: 14px 18px; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 13.5px; color: var(--txt-1); white-space: nowrap; }
.tbl tbody tr { transition: background 0.2s; }
.tbl tbody tr:nth-child(odd) { background: rgba(167, 139, 250, 0.045); }
.tbl tbody tr:hover { background: rgba(34, 211, 238, 0.08); }
.tbl td:first-child { font-family: var(--font); color: var(--txt-0); font-weight: 600; }
.tbl td small { display: block; color: var(--txt-3); font-weight: 400; font-size: 12px; }
.tbl td .hz { color: var(--txt-3); }
.tbl td.copyable { cursor: copy; }
.tbl td.copyable:hover { color: var(--cyan); }

/* ---------- Dropzone ---------- */
.dropzone {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; text-align: center;
  min-height: 240px; padding: 36px; border-radius: var(--r-xl); cursor: pointer;
  border: 2px dashed rgba(167, 139, 250, 0.35); background: radial-gradient(ellipse at center, rgba(167, 139, 250, 0.08), transparent 70%);
  transition: all 0.25s var(--ease);
}
.dropzone:hover, .dropzone.drag { border-color: var(--cyan); background: radial-gradient(ellipse at center, rgba(34, 211, 238, 0.14), transparent 70%); transform: scale(1.005); }
.dropzone .dz-ico { width: 72px; height: 72px; border-radius: 22px; display: grid; place-items: center; font-size: 30px; background: var(--grad-main); color: #0b0b14; box-shadow: var(--shadow-glow); animation: bob 3s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-6px); } }
.dropzone input { display: none; }

/* ---------- Stat tiles ---------- */
.stat { position: relative; overflow: hidden; padding: 22px; border-radius: var(--r-lg); background: var(--glass-2); border: 1px solid var(--line); }
.stat .stat-label { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--txt-2); font-weight: 600; }
.stat .stat-value { font-size: 42px; font-weight: 800; letter-spacing: -0.03em; margin-top: 6px; line-height: 1.05; }
.stat .stat-sub { font-size: 13px; color: var(--txt-2); margin-top: 6px; }
.stat::before { content: ""; position: absolute; width: 140px; height: 140px; border-radius: 50%; right: -40px; top: -40px; background: var(--grad-main); opacity: 0.12; filter: blur(10px); }
.stat.hot::before { background: var(--grad-hot); }
.stat.cool::before { background: var(--grad-cool); }

/* ---------- Progress ---------- */
.progress { height: 8px; border-radius: 99px; background: var(--bg-3); overflow: hidden; }
.progress > span { display: block; height: 100%; width: 0; background: var(--grad-main); border-radius: inherit; transition: width 0.3s var(--ease); }
.progress.indeterminate > span { width: 35%; animation: indet 1.2s ease-in-out infinite; }
@keyframes indet { from { transform: translateX(-100%); } to { transform: translateX(300%); } }

.spinner { width: 18px; height: 18px; border-radius: 50%; border: 2.5px solid rgba(0, 0, 0, 0.2); border-top-color: currentColor; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Toast ---------- */
.toast-wrap { position: fixed; right: 20px; bottom: 20px; z-index: 100; display: flex; flex-direction: column; gap: 10px; }
.toast { padding: 13px 18px; border-radius: var(--r-md); background: var(--bg-2); border: 1px solid var(--line-2); box-shadow: var(--shadow-1); font-size: 14px; animation: toastIn 0.35s var(--ease); max-width: 360px; }
.toast.ok { border-color: rgba(52, 211, 153, 0.4); }
.toast.err { border-color: rgba(244, 63, 94, 0.5); }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px) scale(0.96); } }

/* ---------- Home ---------- */
.hero { position: relative; padding: 48px; border-radius: var(--r-xl); overflow: hidden; background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), rgba(34, 211, 238, 0.06)); border: 1px solid var(--line-2); }
.hero h1 { font-size: clamp(34px, 5.4vw, 62px); font-weight: 800; letter-spacing: -0.04em; line-height: 1.02; }
.hero p { color: var(--txt-1); font-size: 17px; margin-top: 16px; max-width: 620px; }
.hero-eq { position: absolute; right: 40px; bottom: 0; display: flex; gap: 6px; align-items: flex-end; height: 70%; opacity: 0.6; }
.hero-eq span { width: 10px; border-radius: 6px 6px 0 0; background: var(--grad-main); animation: eq 1.2s ease-in-out infinite alternate; }
@keyframes eq { from { height: 15%; } to { height: 100%; } }
.tool-card { display: flex; flex-direction: column; gap: 12px; padding: 24px; border-radius: var(--r-lg); background: var(--glass); border: 1px solid var(--line); transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s; }
.tool-card:hover { transform: translateY(-6px); border-color: rgba(167, 139, 250, 0.4); box-shadow: var(--shadow-glow); }
.tool-card .tc-ico { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; font-size: 22px; color: #0b0b14; }
.tool-card h3 { font-size: 18px; }
.tool-card p { color: var(--txt-2); font-size: 14px; }
.tool-card .tc-go { margin-top: auto; color: var(--cyan); font-weight: 600; font-size: 14px; }

/* ---------- Camelot wheel ---------- */
.camelot-svg text { font-family: var(--font); font-weight: 700; pointer-events: none; }
.camelot-svg path { transition: opacity 0.3s, filter 0.3s; }

/* ---------- Lyrics ---------- */
.structure-opt { cursor: pointer; padding: 18px; border-radius: var(--r-md); border: 1px solid var(--line); background: rgba(8, 8, 16, 0.5); transition: all 0.2s var(--ease); }
.structure-opt:hover { border-color: rgba(167, 139, 250, 0.4); }
.structure-opt.on { border-color: var(--violet); background: rgba(167, 139, 250, 0.1); box-shadow: var(--shadow-glow); }
.structure-opt .so-title { font-weight: 700; display: flex; align-items: center; gap: 8px; }
.flow { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.flow span { font-size: 12px; padding: 4px 9px; border-radius: 8px; background: var(--bg-3); color: var(--txt-1); font-weight: 500; }
.flow span.k-chorus, .flow span.k-hook { background: rgba(236, 72, 153, 0.18); color: var(--pink); }
.flow span.k-verse { background: rgba(167, 139, 250, 0.16); color: var(--violet); }
.flow span.k-bridge { background: rgba(251, 191, 36, 0.15); color: var(--amber); }
.flow span.k-pre { background: rgba(34, 211, 238, 0.14); color: var(--cyan); }

.lyric-out { display: flex; flex-direction: column; gap: 14px; }
.lyric-sec { padding: 18px 20px; border-radius: var(--r-md); background: rgba(8, 8, 16, 0.5); border-left: 3px solid var(--violet); animation: pageIn 0.4s var(--ease) both; }
.lyric-sec.k-chorus, .lyric-sec.k-hook { border-left-color: var(--pink); }
.lyric-sec.k-bridge { border-left-color: var(--amber); }
.lyric-sec.k-pre { border-left-color: var(--cyan); }
.lyric-sec.k-intro, .lyric-sec.k-outro { border-left-color: var(--txt-3); }
.lyric-sec h4 { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--txt-2); margin-bottom: 10px; display: flex; justify-content: space-between; }
.lyric-sec pre { font-family: var(--font); white-space: pre-wrap; font-size: 16px; line-height: 1.85; color: var(--txt-0); }
.timeline { display: flex; height: 34px; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.timeline div { display: grid; place-items: center; font-size: 10.5px; font-weight: 600; color: rgba(0, 0, 0, 0.75); overflow: hidden; white-space: nowrap; border-right: 1px solid rgba(0, 0, 0, 0.25); }

/* ---------- Piano roll ---------- */
.roll-wrap { position: relative; overflow: auto; border-radius: var(--r-md); border: 1px solid var(--line); background: #0a0a14; max-height: 520px; }
.roll-wrap canvas { display: block; }
.track-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.track-tab { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 10px; border: 1px solid var(--line); background: rgba(8, 8, 16, 0.5); cursor: pointer; font-weight: 600; font-size: 13.5px; color: var(--txt-2); transition: all 0.2s; }
.track-tab .sw { width: 10px; height: 10px; border-radius: 3px; }
.track-tab.on { color: var(--txt-0); border-color: var(--line-2); background: var(--bg-3); }
.track-tab .mute { font-size: 11px; opacity: 0.6; }
.chord-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.chord-box { padding: 14px; border-radius: var(--r-md); background: rgba(8, 8, 16, 0.55); border: 1px solid var(--line); text-align: center; transition: all 0.2s; }
.chord-box.playing { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.18); transform: translateY(-3px); }
.chord-box .cb-name { font-size: 22px; font-weight: 800; }
.chord-box .cb-roman { font-size: 12px; color: var(--txt-2); font-family: var(--mono); }
.chord-box .cb-notes { font-size: 11.5px; color: var(--txt-3); margin-top: 4px; font-family: var(--mono); }
.chord-box svg { margin-top: 8px; }

.grid-menu { min-width: 150px; background: #2a2f36; border-radius: 6px; padding: 6px 0; font-size: 13px; border: 1px solid #3a4048; }
.grid-menu label { display: flex; align-items: center; gap: 8px; padding: 4px 12px; cursor: pointer; color: #cfd6de; }
.grid-menu label:hover { background: #3a4048; }
.grid-menu hr { border: 0; border-top: 1px solid #3a4048; margin: 5px 0; }

/* ---------- Misc ---------- */
.kbd { font-family: var(--mono); font-size: 12px; padding: 2px 7px; border-radius: 6px; background: var(--bg-3); border: 1px solid var(--line-2); }
.divider { height: 1px; background: var(--line); margin: 20px 0; }
.notice { display: flex; gap: 12px; padding: 14px 16px; border-radius: var(--r-md); background: rgba(251, 191, 36, 0.07); border: 1px solid rgba(251, 191, 36, 0.25); color: var(--txt-1); font-size: 13.5px; }
.notice.info { background: rgba(34, 211, 238, 0.06); border-color: rgba(34, 211, 238, 0.25); }
.empty { padding: 40px; text-align: center; color: var(--txt-3); border: 1px dashed var(--line-2); border-radius: var(--r-md); }
.hidden { display: none !important; }
.wave-canvas { width: 100%; height: 90px; display: block; border-radius: var(--r-md); background: rgba(8, 8, 16, 0.5); }
.lib-item { display: flex; gap: 12px; align-items: flex-start; padding: 14px; border-radius: var(--r-md); background: rgba(8, 8, 16, 0.45); border: 1px solid var(--line); }
.lib-item .li-body { flex: 1; min-width: 0; }
.lib-item .li-prev { font-size: 13px; color: var(--txt-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.yt-thumb { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--r-md); background: var(--bg-2); }
.fmt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.fmt-btn { padding: 14px 10px; border-radius: var(--r-md); border: 1px solid var(--line); background: rgba(8, 8, 16, 0.5); cursor: pointer; text-align: center; transition: all 0.2s; }
.fmt-btn:hover { border-color: var(--cyan); }
.fmt-btn.on { border-color: var(--violet); background: rgba(167, 139, 250, 0.12); }
.fmt-btn b { display: block; font-size: 16px; }
.fmt-btn span { font-size: 11.5px; color: var(--txt-2); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .sidebar { position: fixed; z-index: 50; transform: translateX(-100%); }
  .sidebar.open { transform: none; box-shadow: 20px 0 60px rgba(0, 0, 0, 0.6); }
  .menu-toggle { display: grid; }
  .page { padding: 20px; }
  .topbar { padding: 12px 20px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 30px; }
  .hero-eq { display: none; }
}
@media (max-width: 520px) { .grid-4 { grid-template-columns: 1fr; } .stat .stat-value { font-size: 34px; } }