/* RhythmTheory — Veznero rhythm lab (space-dark, post-modern). */
@charset "UTF-8";

:root {
  --void: #030508;
  --deep: #080b12;
  --nebula: #120a24;
  --panel: rgba(10, 14, 24, 0.82);
  --panel-solid: #0a0e18;
  --panel-glass: rgba(12, 16, 28, 0.72);
  --line: rgba(148, 163, 184, 0.12);
  --line-strong: rgba(148, 163, 184, 0.22);
  --ink: #eef0ff;
  --ink-soft: #94a3b8;
  --ink-dim: #5f6d82;
  --violet: #8b5cf6;
  --violet-bright: #c4b5fd;
  --iris: #a78bfa;
  --cosmos: #38bdf8;
  --cosmos-bright: #7dd3fc;
  --pulse: #f0abfc;
  --signal: #e879f9;
  --accent-gradient: linear-gradient(120deg, var(--cosmos-bright) 0%, var(--violet-bright) 48%, var(--pulse) 100%);
  --glow-violet: 0 0 32px rgba(139, 92, 246, 0.28);
  --glow-cosmos: 0 0 28px rgba(56, 189, 248, 0.22);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Outfit", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 18px;
  --radius-sm: 10px;
  --header-height: 4.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--void);
  overflow-x: hidden;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.void-field {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(56, 189, 248, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 20%, rgba(139, 92, 246, 0.12), transparent 50%),
    radial-gradient(ellipse 50% 35% at 0% 80%, rgba(232, 121, 249, 0.08), transparent 45%),
    linear-gradient(180deg, #04060c 0%, var(--void) 40%, #050810 100%);
}

.void-field__stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.45), transparent),
    radial-gradient(1px 1px at 60% 70%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1px 1px at 80% 10%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 40% 90%, rgba(255, 255, 255, 0.25), transparent),
    radial-gradient(1.5px 1.5px at 90% 50%, rgba(196, 181, 253, 0.5), transparent),
    radial-gradient(1px 1px at 10% 60%, rgba(125, 211, 252, 0.4), transparent);
  opacity: 0.7;
}

.void-field__nebula {
  position: absolute;
  inset: -20%;
  background: radial-gradient(circle at 65% 35%, rgba(139, 92, 246, 0.14), transparent 42%);
  filter: blur(40px);
  animation: nebula-drift 24s ease-in-out infinite alternate;
}

.void-field__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent 75%);
}

.film-grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

@keyframes nebula-drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to { transform: translate3d(2%, 1%, 0) scale(1.05); }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(3, 5, 8, 0.72);
  border-bottom: 1px solid var(--line);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
}

.site-nav__brand-group {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-nav__mark {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent-gradient);
  box-shadow: var(--glow-violet);
}

.site-nav__platform {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav__platform:hover,
.site-nav__platform:focus-visible {
  color: var(--cosmos-bright);
}

.site-nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  border-radius: var(--radius-sm);
}

.site-nav__toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
}

.site-nav__collapse {
  display: block !important;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.45rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link.is-active {
  color: var(--ink);
  background: rgba(139, 92, 246, 0.12);
}

.site-nav__link--platform {
  color: var(--cosmos-bright);
}

.site-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
  min-height: calc(100vh - var(--header-height) - 2rem);
  padding: 3rem 0 2rem;
}

.hero__eyebrow {
  color: var(--cosmos-bright);
  margin: 0 0 0.75rem;
}

.hero__brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__headline {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 16ch;
}

.hero__lede {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  max-width: 46ch;
  font-weight: 300;
}

.hero__features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
}

.hero__feature {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--violet-bright);
  background: rgba(139, 92, 246, 0.08);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn-primary-action,
.btn-ghost-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary-action {
  color: var(--void);
  background: var(--accent-gradient);
  box-shadow: var(--glow-violet);
}

.btn-primary-action:hover,
.btn-primary-action:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--glow-violet), var(--glow-cosmos);
}

.btn-ghost-action {
  color: var(--ink);
  border: 1px solid var(--line-strong);
  background: var(--panel-glass);
}

.btn-ghost-action:hover,
.btn-ghost-action:focus-visible {
  border-color: var(--iris);
  color: var(--violet-bright);
}

.orbit-lab {
  position: relative;
  width: min(100%, 380px);
  aspect-ratio: 1;
  margin: 0 auto;
}

.orbit-lab__ring {
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.orbit-lab__ring--outer {
  inset: 0;
  animation: orbit-spin 28s linear infinite;
}

.orbit-lab__ring--mid {
  inset: 18%;
  border-color: rgba(56, 189, 248, 0.3);
  animation: orbit-spin 18s linear infinite reverse;
}

.orbit-lab__core {
  position: absolute;
  inset: 38%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(240, 171, 252, 0.35), rgba(139, 92, 246, 0.05) 70%);
  box-shadow: var(--glow-violet);
}

.orbit-lab__ticks {
  position: absolute;
  inset: 8%;
}

.orbit-lab__ticks span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px;
  height: 10px;
  margin: -5px 0 0 -1px;
  background: linear-gradient(180deg, var(--cosmos-bright), transparent);
  transform: rotate(calc((var(--i) - 1) * 22.5deg)) translateY(-165px);
  opacity: calc(0.35 + (var(--i) % 4) * 0.15);
}

@keyframes orbit-spin {
  to { transform: rotate(360deg); }
}

.home-studios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.home-studio {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(12px);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.home-studio:hover {
  border-color: rgba(139, 92, 246, 0.35);
  transform: translateY(-2px);
}

.home-studio__code {
  color: var(--cosmos-bright);
  margin: 0 0 0.5rem;
}

.home-studio__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.home-studio__lede {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.home-studio__link {
  color: var(--violet-bright);
  text-decoration: none;
}

.home-studio__link:hover,
.home-studio__link:focus-visible {
  color: var(--cosmos-bright);
}

.tool {
  padding: 2.5rem 0 1rem;
}

.tool__header {
  max-width: 52rem;
  margin-bottom: 2rem;
}

.tool__eyebrow {
  margin: 0 0 0.5rem;
  color: var(--cosmos-bright);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tool__module {
  color: var(--pulse);
}

.tool__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.tool__lede {
  margin: 0;
  color: var(--ink-soft);
  font-weight: 300;
  max-width: 52ch;
}

.filter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.75rem;
}

.filter-nav__link {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  background: rgba(8, 11, 18, 0.5);
}

.filter-nav__link:hover,
.filter-nav__link:focus-visible,
.filter-nav__link.is-active {
  color: var(--ink);
  border-color: rgba(139, 92, 246, 0.45);
  background: rgba(139, 92, 246, 0.12);
}

.pattern-list {
  display: grid;
  gap: 1.25rem;
}

.pattern-card {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(14px);
}

.pattern-card__header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.pattern-card__meta {
  margin: 0 0 0.35rem;
  color: var(--cosmos-bright);
}

.pattern-card__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.pattern-card__lede {
  margin: 0;
  color: var(--ink-soft);
}

.pattern-card__badge {
  flex-shrink: 0;
  align-self: start;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--cosmos-bright);
  background: rgba(56, 189, 248, 0.08);
}

.pattern-card__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem 1.25rem;
  margin: 0 0 1.25rem;
}

.pattern-card__facts dt {
  margin: 0 0 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.pattern-card__facts dd {
  margin: 0;
  color: var(--ink);
}

.sticking-lane {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(3, 5, 8, 0.55);
  border: 1px solid var(--line);
}

.sticking-lane__stroke {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.sticking-lane__stroke.is-accent {
  border-color: rgba(232, 121, 249, 0.5);
  color: var(--pulse);
}

.sticking-lane__stroke.is-active {
  color: var(--void);
  background: var(--accent-gradient);
  border-color: transparent;
  box-shadow: var(--glow-violet);
  transform: scale(1.08);
}

.drum-grid {
  margin-bottom: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(3, 5, 8, 0.55);
  border: 1px solid var(--line);
  overflow-x: auto;
}

.drum-grid__labels {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.drum-grid__labels span:first-child {
  grid-column: 1;
}

.drum-grid__lanes {
  display: grid;
  gap: 0.35rem;
}

.drum-grid__lane {
  display: grid;
  grid-template-columns: 3rem repeat(16, minmax(1.1rem, 1fr));
  gap: 0.25rem;
  align-items: center;
}

.drum-grid__lane::before {
  content: attr(data-lane);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.drum-grid__lane--hat::before { content: "Hat"; }
.drum-grid__lane--snare::before { content: "Sn"; }
.drum-grid__lane--kick::before { content: "K"; }

.drum-grid__cell {
  aspect-ratio: 1;
  border-radius: 4px;
  border: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(8, 11, 18, 0.8);
  transition: background 0.12s ease, box-shadow 0.12s ease;
}

.drum-grid__lane--hat .drum-grid__cell.is-on {
  background: rgba(56, 189, 248, 0.35);
  box-shadow: inset 0 0 0 1px rgba(125, 211, 252, 0.35);
}

.drum-grid__lane--snare .drum-grid__cell.is-on {
  background: rgba(167, 139, 250, 0.4);
}

.drum-grid__lane--snare .drum-grid__cell.is-accent {
  background: rgba(232, 121, 249, 0.55);
  box-shadow: var(--glow-violet);
}

.drum-grid__lane--kick .drum-grid__cell.is-on {
  background: rgba(240, 171, 252, 0.45);
}

.drum-grid__cell.is-pulse {
  outline: 1px solid var(--cosmos-bright);
  outline-offset: 1px;
}

.drum-grid__beats {
  display: grid;
  grid-template-columns: 3rem repeat(16, minmax(1.1rem, 1fr));
  gap: 0.25rem;
  margin-top: 0.35rem;
  color: var(--ink-dim);
  font-size: 0.62rem;
  text-align: center;
}

.drum-grid__beat.is-downbeat {
  color: var(--cosmos-bright);
}

.player-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.player-controls__play {
  min-width: 5.5rem;
  padding: 0.65rem 1rem;
  border: 1px solid rgba(139, 92, 246, 0.45);
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.14);
  color: var(--violet-bright);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.player-controls__play:hover,
.player-controls__play:focus-visible {
  background: rgba(139, 92, 246, 0.24);
}

.player-controls__play.is-playing {
  color: var(--void);
  background: var(--accent-gradient);
  box-shadow: var(--glow-violet);
}

.player-controls__tempo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.player-controls__tempo input[type="range"] {
  width: min(220px, 40vw);
  accent-color: var(--violet);
}

.player-controls__bpm {
  min-width: 2.5rem;
  color: var(--cosmos-bright);
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  padding: 2rem 1.25rem 2.5rem;
  background: rgba(3, 5, 8, 0.6);
}

.site-footer__inner {
  max-width: 1180px;
  margin: 0 auto;
}

.site-footer__brand {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 600;
}

.site-footer__lede {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
}

.site-footer__link {
  color: var(--ink-soft);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--violet-bright);
}

.site-footer__meta {
  margin: 0;
  color: var(--ink-dim);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 2rem;
  }

  .home-studios {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-nav__toggle {
    display: inline-flex;
  }

  .site-nav__collapse:not(.show) .site-nav__links {
    display: none;
  }

  .site-nav__collapse.show .site-nav__links {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 0 0.25rem;
  }

  .pattern-card__header {
    flex-direction: column;
  }
}