/* Syncrovibes — base styles for the static reference build.
   Tokens mirror the brand guidelines (v1.0). Page sections still carry the
   designer's inline styles 1:1; move them into components when porting. */

/* ---------- fonts (self-hosted, SIL OFL) ---------- */
@font-face { font-family: 'Space Grotesk'; font-weight: 400; font-display: swap; src: url('../fonts/SpaceGrotesk-Regular.woff2') format('woff2'); }
@font-face { font-family: 'Space Grotesk'; font-weight: 500; font-display: swap; src: url('../fonts/SpaceGrotesk-Medium.woff2') format('woff2'); }
@font-face { font-family: 'Space Grotesk'; font-weight: 700; font-display: swap; src: url('../fonts/SpaceGrotesk-Bold.woff2') format('woff2'); }
@font-face { font-family: 'JetBrains Mono'; font-weight: 500; font-display: swap; src: url('../fonts/JetBrainsMono-Medium.woff2') format('woff2'); }
@font-face { font-family: 'JetBrains Mono'; font-weight: 700; font-display: swap; src: url('../fonts/JetBrainsMono-Bold.woff2') format('woff2'); }

/* ---------- tokens ---------- */
:root {
  --sv-black: #0A0B0F;      /* Stage Black */
  --sv-bg: #05060A;         /* page field */
  --sv-surface: #0E0F14;    /* cards */
  --sv-surface-2: #08090D;  /* bands */
  --sv-line: #1C1E24;
  --sv-line-2: #2C2F38;
  --sv-text: #F4F5F7;       /* Stage White */
  --sv-text-2: #C9CDD5;
  --sv-text-3: #A9AEB8;
  --sv-muted: #8E939C;      /* Graphite */
  --sv-lime: #C6FF3A;       /* Volt Lime — CTAs, live */
  --sv-magenta: #FF4D8D;    /* Cue Magenta — playhead / keypoint */
  --sv-warn: #FF5A4E;       /* SIGNAL LOST only */
  /* key-point grammar */
  --kp-intro: #3AE8FF; --kp-build: #66EFD0; --kp-drop: #C6FF3A; --kp-breakdown: #8A5CFF; --kp-outro: #8E939C;
  --sv-font: 'Space Grotesk', system-ui, sans-serif;
  --sv-mono: 'JetBrains Mono', ui-monospace, monospace;
  --sv-radius: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }
body { margin: 0; background: var(--sv-bg); color: var(--sv-text); font-family: var(--sv-font); }
img { max-width: 100%; }
a { color: var(--sv-lime); }
a:hover { color: #FFFFFF; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 2px solid var(--sv-lime); outline-offset: 3px; }
input::placeholder, textarea::placeholder { color: #6C717B; }
[hidden] { display: none !important; }
.sv-skip { position: absolute; left: -9999px; top: 8px; background: var(--sv-lime); color: var(--sv-black); padding: 10px 16px; border-radius: 8px; z-index: 100; }
.sv-skip:focus { left: 8px; }

/* ---------- shared atoms ---------- */
.sv-row { display: flex; flex-wrap: wrap; gap: 12px; }
.sv-btn { display: inline-block; padding: 15px 24px; border-radius: 999px; font-size: 16px; font-weight: 700; text-decoration: none; }
.sv-btn--primary { background: var(--sv-lime); color: var(--sv-black); }
.sv-btn--primary:hover { color: var(--sv-black); background: #D8FF6E; }
.sv-btn--ghost { color: var(--sv-text); border: 1px solid #3A3D46; background: rgba(10,11,15,0.5); font-weight: 500; }
.sv-btn--sm { padding: 11px 18px; font-size: 15px; }
.sv-label { font-family: var(--sv-mono); font-size: 11px; letter-spacing: 0.2em; color: #9AA0AA; }
.sv-label--lime { color: var(--sv-lime); letter-spacing: 0.12em; }
.sv-eyebrow { font-family: var(--sv-mono); font-size: 14px; font-weight: 500; letter-spacing: 0.22em; }
.sv-eyebrow--lime { color: var(--sv-lime); }

/* ---------- nav ---------- */
.sv-nav { position: sticky; top: 0; z-index: 20; background: rgba(5,6,10,0.86); border-bottom: 1px solid var(--sv-line); backdrop-filter: blur(8px); }
.sv-nav__bar { max-width: 1360px; margin: 0 auto; height: 72px; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.sv-nav__logo img { height: 44px; width: auto; margin-left: -10px; display: block; }
.sv-nav__links { display: flex; align-items: center; gap: 30px; font-size: 15px; }
.sv-nav__links a:not(.sv-btn) { color: var(--sv-text-3); text-decoration: none; font-weight: 500; padding: 8px 0; border-bottom: 2px solid transparent; }
.sv-nav__links a[aria-current="page"] { color: var(--sv-text); font-weight: 700; border-bottom-color: var(--sv-lime); }
.sv-nav__menu { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--sv-line-2); background: transparent; color: var(--sv-text); align-items: center; justify-content: center; cursor: pointer; }
.sv-nav__sheet { padding: 8px 24px 24px; display: flex; flex-direction: column; gap: 4px; border-top: 1px solid var(--sv-line); }
.sv-nav__sheet a:not(.sv-btn) { color: var(--sv-text-3); text-decoration: none; font-size: 18px; padding: 12px 0; border-bottom: 1px solid #15161B; }
.sv-nav__sheet a[aria-current="page"] { color: var(--sv-text); }
.sv-nav__sheet .sv-btn { margin-top: 12px; text-align: center; }
@media (max-width: 900px) { .sv-nav__links { display: none; } .sv-nav__menu { display: flex; } }

/* ---------- hero ---------- */
.svh { position: relative; width: 100%; height: 860px; overflow: hidden; background: var(--sv-bg); color: var(--sv-text); }
.svh-stage { position: absolute; inset: 0; }
.svh-stage canvas { display: block; width: 100%; height: 100%; cursor: grab; touch-action: pan-y; }
.svh-scrim { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(90deg, rgba(5,6,10,0.94) 0%, rgba(5,6,10,0.7) 30%, rgba(5,6,10,0) 56%); }
.svh-copy { position: absolute; left: 64px; top: 88px; max-width: 580px; display: flex; flex-direction: column; gap: 26px; }
.svh-title { margin: 0; font-size: clamp(38px, 9vw, 64px); line-height: 1.02; font-weight: 700; letter-spacing: -0.03em; }
.svh-sub { margin: 0; font-size: 19px; line-height: 1.55; color: var(--sv-text-2); max-width: 520px; }
.svh-micro { font-family: var(--sv-mono); font-size: 12.5px; letter-spacing: 0.06em; color: #9AA0AA; }
.svh-cards { position: absolute; right: 36px; top: 36px; width: 330px; display: flex; flex-direction: column; gap: 12px; }
.svh-card { border-radius: 14px; background: rgba(10,11,15,0.8); border: 1px solid #23252D; overflow: hidden; }
.svh-card__bar { height: 3px; }
.svh-card__body { padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; }
.svh-next { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.svh-next__kind { font-size: 26px; font-weight: 700; }
.svh-next__time { font-family: var(--sv-mono); font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; }
.svh-now { font-family: var(--sv-mono); font-size: 12px; color: #9AA0AA; display: flex; align-items: center; gap: 8px; }
.svh-dot { width: 8px; height: 8px; border-radius: 2px; }
.svh-card--log { padding: 16px 18px; display: flex; flex-direction: column; gap: 12px; }
.svh-log__head { display: flex; align-items: center; justify-content: space-between; }
.svh-arm { cursor: pointer; font-family: var(--sv-mono); font-size: 12px; font-weight: 700; letter-spacing: 0.12em; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--sv-magenta); background: transparent; color: var(--sv-magenta); }
.svh-arm.is-armed { border-color: var(--sv-lime); background: var(--sv-lime); color: var(--sv-black); }
.svh-log__empty { margin: 0; font-size: 14px; line-height: 1.5; color: #9AA0AA; }
.svh-log { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; }
.svh-log li { display: flex; flex-direction: column; gap: 3px; padding: 10px 0 0; margin-top: 10px; border-top: 1px solid var(--sv-line); }
.svh-log li:first-child { margin-top: 0; }
.svh-log .t { font-family: var(--sv-mono); font-size: 11px; }
.svh-log .x { font-size: 14px; line-height: 1.35; }
.svh-log .r { font-family: var(--sv-mono); font-size: 11px; color: var(--sv-muted); }
.svh-player { position: absolute; left: 36px; right: 36px; bottom: 28px; border-radius: 16px; background: rgba(10,11,15,0.82); border: 1px solid #23252D; padding: 14px 18px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }
.svh-play { cursor: pointer; width: 52px; height: 52px; flex-shrink: 0; border-radius: 50%; border: none; background: var(--sv-lime); display: flex; align-items: center; justify-content: center; }
.svh-track { display: flex; flex-direction: column; gap: 4px; min-width: 170px; }
.svh-track__title { font-size: 16px; font-weight: 700; }
.svh-track__artist { font-size: 12.5px; color: #9AA0AA; }
.svh-clock { display: flex; flex-direction: column; gap: 4px; min-width: 96px; }
.svh-clock__time { font-family: var(--sv-mono); font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.svh-clock__bpm { font-family: var(--sv-mono); font-size: 12px; color: #9AA0AA; }
.svh-beats { display: flex; gap: 5px; }
.svh-beats span { width: 10px; height: 10px; border-radius: 3px; background: #23252D; }
.svh-beats span.on { background: var(--sv-lime); }
.svh-beats span.on.one { background: var(--sv-magenta); }
.svh-timeline { flex: 1 1 360px; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.svh-segs { position: relative; display: flex; gap: 4px; }
.svh-segs button { position: relative; cursor: pointer; min-width: 0; height: 40px; border-radius: 6px; border: 1px solid #23252D; background: rgba(10,11,15,0.55); overflow: hidden; padding: 0; }
.svh-segs button.is-on { border-color: var(--c); }
.svh-wave { position: absolute; inset: 0; display: flex; align-items: center; gap: 1px; padding: 5px 5px; opacity: 0.5; }
.svh-wave i { flex: 1 1 0; min-width: 1px; background: var(--c); border-radius: 1px; }
.svh-segs button:hover .svh-wave, .svh-segs button:focus-visible .svh-wave { opacity: 0.8; }
.svh-segs button.is-on .svh-wave { opacity: 1; }
.svh-seg__label { position: absolute; left: 0; right: 0; bottom: 3px; text-align: center; font-family: var(--sv-mono); font-size: 10px; font-weight: 700; letter-spacing: 0.1em; color: var(--sv-text); text-shadow: 0 1px 2px rgba(0,0,0,0.95), 0 0 6px rgba(0,0,0,0.7); pointer-events: none; }
.svh-segs button.is-on .svh-seg__label { color: var(--sv-black); text-shadow: none; }
.svh-playhead { position: absolute; top: -5px; bottom: -5px; width: 3px; border-radius: 2px; background: var(--sv-magenta); left: -1px; }
.svh-note { font-size: 12px; color: var(--sv-muted); }
.svh-palette { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.svh-palette span:first-child { width: 44px; height: 14px; border-radius: 7px; background: linear-gradient(90deg, #3AE8FF, #8A5CFF); }
@media (max-width: 980px) {
  .svh { height: auto; }
  .svh-stage { position: relative; height: 440px; }
  .svh-scrim { display: none; }
  .svh-copy, .svh-cards, .svh-player { position: static; max-width: none; width: auto; margin: 24px 16px; }
}

/* ---------- how-it-works arrows ---------- */
@media (max-width: 760px) { .sv-arrow { flex-basis: 100% !important; height: 24px; } .sv-arrow svg { transform: rotate(90deg); } }

/* ---------- FAQ (native <details>) ---------- */
.sv-faq { border-bottom: 1px solid var(--sv-line); }
.sv-faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 22px 0; font-size: 19px; font-weight: 700; }
.sv-faq summary::-webkit-details-marker { display: none; }
.sv-faq-sign { font-family: var(--sv-mono); color: var(--sv-lime); font-size: 22px; }
.sv-faq[open] .sv-faq-sign { transform: rotate(45deg); }
.sv-faq p { margin: 0; padding: 0 0 22px; font-size: 17px; line-height: 1.6; color: var(--sv-text-3); max-width: 760px; }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

/* ---------- footer ---------- */
.svf a { color: var(--sv-text-3); }
.svf a:hover { color: #FFFFFF; }