/* ===== RESET ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== BASE ===== */
html, body {
  height: 100%;
  background: #0c0d0f;
  color: #ededed;
  font-family: "Aptos", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== PAGE ENTRY (MATCH HOME) ===== */
body {
  opacity: 0;
  transition: opacity 0.8s ease;
}

body.loaded {
  opacity: 1;
}

/* ===== TOP BAR ===== */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 78px;
  background: rgba(12,13,15,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  z-index: 100;
}

.topbar-inner {
  max-width: 1600px;
  height: 100%;
  margin: 0 auto;
  padding: 0 5vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  text-decoration: none;
  font-size: 1.05rem;
  letter-spacing: 0.22em;
  color: rgba(255,255,255,0.95);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px 0;
  background: rgba(255,255,255,0.9);
}

/* ===== NAV ===== */
.nav {
  display: flex;
  gap: 2.2rem;
}

.nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.6);
  padding-bottom: 6px;
  transition: color 0.25s ease;
}

.nav a:hover,
.nav a.active {
  color: #ffffff;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0%;
  height: 1px;
  background: rgba(255,255,255,0.6);
  transition: width 0.28s ease, left 0.28s ease;
}

.nav a:hover::after,
.nav a.active::after {
  width: 100%;
  left: 0;
}

/* ===== PAGE ===== */
.page {
  padding-top: 120px;
}

.page-header {
  text-align: center;
  margin-bottom: 80px;
}

.page-header h1 {
  font-size: 2.4rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.9);
}

/* ===== CONTENT SURFACE ===== */
.content-surface {
  background: #181818;
}

.content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 96px 6vw 140px;
}

/* ===== INTRO ===== */
.intro {
  max-width: 720px;
  margin: 0 auto 80px;
  text-align: center;
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.75);
}

/* ==================================================
   RESEARCH: STACKED HORIZONTAL CARDS
   ================================================== */

.research-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.research-card {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.research-card a {
  display: block;
  padding: 36px 40px;
  text-decoration: none;
  color: inherit;
}

.research-card:hover {
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.04);
}

.research-card h2 {
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.95);
}

.research-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.75);
  margin-bottom: 18px;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  max-width: 420px;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.62);
  text-transform: uppercase;
}

/* ===== FOOTER ===== */
.footer {
  height: 64px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.6);
}

/* ===== GRAIN ===== */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.008'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {

  .topbar {
    height: 64px;
  }

  .brand {
    font-size: 0.9rem;
    letter-spacing: 0.18em;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #0c0d0f;
    flex-direction: column;
    align-items: center;
    gap: 22px;
    padding: 28px 0 36px;
    border-bottom: 1px solid rgba(255,255,255,0.06);

    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px);
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .nav.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav a {
    font-size: 0.78rem;
  }

  .page-header h1 {
    font-size: 1.8rem;
  }

  .content {
    padding: 72px 6vw 120px;
  }

  .intro {
    font-size: 0.95rem;
    margin-bottom: 64px;
  }

  .research-card a {
    padding: 28px;
  }

  .research-card h2 {
    font-size: 1rem;
  }

  .research-card p {
    font-size: 0.85rem;
  }
}


/* ==================================================
   STUDIO
   ================================================== */
:root {
  --cyan: #35e0ff;
  --mag: #ff4d9d;
  --amber: #ffd54a;
}

.studio {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 4vw 120px;
}

.studio .hint {
  font-size: 0.82rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: rgba(255,255,255,0.6);
  text-align: center;
  max-width: 760px;
  margin: 0 auto 26px;
}
.studio .hint kbd {
  font-family: inherit;
  font-size: 0.74rem;
  padding: 1px 6px;
  border: 1px solid rgba(53,224,255,0.4);
  border-radius: 5px;
  color: #cdefff;
  background: rgba(53,224,255,0.08);
}

/* transport */
.transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  padding: 16px 20px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  margin-bottom: 22px;
}

.ctrl {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.56rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.ctrl .val { color: #cdefff; font-variant-numeric: tabular-nums; }

.transport select,
.track select {
  -webkit-appearance: none;
  appearance: none;
  background: #0e1013;
  color: #eaf6ff;
  border: 1px solid rgba(53,224,255,0.35);
  border-radius: 8px;
  padding: 7px 10px;
  font-family: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.transport input[type="range"] { width: 120px; accent-color: var(--cyan); }

.play-btn {
  -webkit-appearance: none;
  appearance: none;
  min-width: 96px;
  padding: 12px 20px;
  border-radius: 10px;
  border: none;
  background: var(--cyan);
  color: #05121a;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 0 26px -6px rgba(53,224,255,0.8);
  transition: transform 0.1s ease, box-shadow 0.15s ease;
}
.play-btn:hover { transform: translateY(-1px); }
.play-btn.playing { background: var(--amber); box-shadow: 0 0 26px -6px rgba(255,213,74,0.8); }

.rec-btn {
  -webkit-appearance: none;
  appearance: none;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid rgba(255,77,157,0.6);
  background: rgba(255,77,157,0.08);
  color: #ffd0e4;
  font-family: inherit;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s ease, box-shadow 0.15s ease;
}
.rec-btn.armed {
  background: var(--mag);
  color: #2a0716;
  box-shadow: 0 0 24px -4px rgba(255,77,157,0.9);
  animation: recpulse 1s ease-in-out infinite;
}
@keyframes recpulse { 0%,100% { opacity: 1; } 50% { opacity: 0.75; } }

/* tracks */
.track {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
  padding: 12px 14px;
  margin-bottom: 14px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.track.sel { border-color: rgba(53,224,255,0.55); background: rgba(53,224,255,0.05); }

.thead {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}
.thead .tname {
  min-width: 66px;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #eaf6ff;
  cursor: pointer;
}
.thead .spacer { flex: 1; }
.thead input[type="range"] { width: 84px; accent-color: var(--cyan); }

.tbtn {
  -webkit-appearance: none;
  appearance: none;
  padding: 6px 10px;
  border-radius: 7px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.8);
  font-family: inherit;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
}
.tbtn:hover { border-color: rgba(255,255,255,0.45); color: #fff; }
.tbtn.on { background: rgba(255,77,157,0.25); border-color: rgba(255,77,157,0.7); color: #ffd0e4; }

/* sequencer grid */
.grid { display: flex; flex-direction: column; gap: 4px; }
.lane { display: flex; align-items: center; gap: 6px; }
.rlabel {
  width: 42px;
  flex: 0 0 42px;
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.45);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.cells { display: grid; grid-template-columns: repeat(16, 1fr); gap: 4px; flex: 1; }

.cell {
  height: 22px;
  border-radius: 5px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.06);
  cursor: pointer;
  transition: background 0.08s ease, box-shadow 0.08s ease, transform 0.05s ease;
}
/* every 4th step (beat) a touch brighter */
.cell.beat { background: rgba(255,255,255,0.09); }
.cell:hover { background: rgba(53,224,255,0.18); }
.cell.on {
  background: var(--cyan);
  border-color: rgba(53,224,255,0.9);
  box-shadow: 0 0 12px -2px rgba(53,224,255,0.7);
}
.track.drums .cell.on { background: var(--mag); border-color: rgba(255,77,157,0.9); box-shadow: 0 0 12px -2px rgba(255,77,157,0.7); }
.cell.cur { outline: 2px solid rgba(255,213,74,0.9); outline-offset: -1px; }
.cell.on.cur { box-shadow: 0 0 16px 0 rgba(255,213,74,0.9); }

/* step ruler / playhead */
.ruler { display: flex; align-items: center; gap: 6px; margin: 2px 0 12px; }
.ruler .rlabel { visibility: hidden; }
.ruler .dots { display: grid; grid-template-columns: repeat(16, 1fr); gap: 4px; flex: 1; }
.dot { height: 6px; border-radius: 3px; background: rgba(255,255,255,0.1); }
.dot.beat { background: rgba(255,255,255,0.2); }
.dot.cur { background: var(--amber); box-shadow: 0 0 10px 0 rgba(255,213,74,0.9); }

@media (max-width: 768px) {
  .studio { padding: 14px 3vw 100px; }
  .cell { height: 26px; }
  .rlabel { width: 34px; flex-basis: 34px; }
  .transport { gap: 10px 14px; padding: 12px; }
  .transport input[type="range"] { width: 92px; }
}


/* playable keys bar */
.playbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 18px;
}
.pb-label {
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.pb-track { color: var(--cyan); margin-left: 4px; }
.pads { display: flex; flex-wrap: wrap; gap: 8px; }
.pad {
  -webkit-appearance: none;
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 54px;
  padding: 12px 0 9px;
  background: rgba(53,224,255,0.06);
  border: 1px solid rgba(53,224,255,0.3);
  border-radius: 10px;
  color: #eaf6ff;
  font-family: inherit;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: transform 0.06s ease, background 0.1s ease, box-shadow 0.1s ease;
}
.pad .pnum { font-size: 0.98rem; font-weight: 600; color: #cdefff; }
.pad .pnote { font-size: 0.56rem; letter-spacing: 0.1em; color: rgba(255,255,255,0.5); }
.pad:hover { border-color: rgba(53,224,255,0.6); }
.pad.hit {
  transform: translateY(2px);
  background: var(--cyan);
  border-color: rgba(53,224,255,0.9);
  box-shadow: 0 0 22px -4px rgba(53,224,255,0.9);
}
.pad.hit .pnum, .pad.hit .pnote { color: #05121a; }

/* metronome toggle uses an amber lit state (distinct from the magenta mute) */
.tbtn.metro.on {
  background: rgba(255,213,74,0.22);
  border-color: rgba(255,213,74,0.7);
  color: #fff3c4;
}


/* drum pads: wider (longer labels) with the magenta drum accent */
.pad.drumpad { min-width: 66px; background: rgba(255,77,157,0.06); border-color: rgba(255,77,157,0.32); }
.pad.drumpad:hover { border-color: rgba(255,77,157,0.6); }
.pad.drumpad.hit { background: var(--mag); border-color: rgba(255,77,157,0.9); box-shadow: 0 0 22px -4px rgba(255,77,157,0.9); }
.pad.drumpad.hit .pnum, .pad.drumpad.hit .pnote { color: #2a0716; }


/* chromatic piano: sharps read as black keys, in-scale rows get a green tint */
.pad.sharp { background: rgba(255,255,255,0.03); border-color: rgba(255,255,255,0.14); }
.pad.sharp .pnum { color: #9fb2c8; }
.pad.sharp .pnote { color: rgba(255,255,255,0.4); }
.pad.sharp:hover { border-color: rgba(255,255,255,0.35); }
.pad.sharp.hit { background: #b9deff; border-color: #b9deff; }
.pad.sharp.hit .pnum, .pad.sharp.hit .pnote { color: #05121a; }

.lane.sharprow .rlabel { opacity: 0.65; }
.rlabel.inscale { color: #8fe0a8; }

/* make it obvious which track the keyboard plays */
.tname { cursor: pointer; }
.tname:hover { color: #fff; }
.track.sel .tname::before { content: "\25B8 "; color: var(--cyan); }


/* octave control in the play bar */
.octctl { display: inline-flex; align-items: center; gap: 8px; }
.octlab { font-size: 0.6rem; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(255,255,255,0.45); }
.octval { min-width: 24px; text-align: center; color: #cdefff; font-variant-numeric: tabular-nums; font-weight: 600; }
.octctl .tbtn { min-width: 34px; padding: 6px 0; }


/* ===== PHONE ===== */
@media (max-width: 640px) {
  body { overflow-x: hidden; }
  .studio { padding: 12px 3vw 96px; }
  .studio .hint { font-size: 0.8rem; margin-bottom: 18px; }

  .transport {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 12px;
    padding: 12px;
    border-radius: 12px;
    align-items: center;
  }
  .transport .play-btn { grid-column: 1 / -1; width: 100%; }
  .transport input[type="range"] { width: 100%; }
  .transport select { width: 100%; }
  .ctrl { min-width: 0; }
  .play-btn { padding: 12px 16px; font-size: 0.78rem; }
  .rec-btn { padding: 11px 12px; }

  /* bigger, easier-to-hit grid cells */
  .cell { height: 30px; }
  .cells { gap: 3px; }
  .rlabel { width: 30px; flex-basis: 30px; font-size: 0.52rem; }
  .dot { height: 5px; }

  /* playable pads sized for thumbs */
  .pad { min-width: 42px; min-height: 48px; padding: 9px 0 7px; }
  .pad.drumpad { min-width: 56px; }
  .pad .pnum { font-size: 0.9rem; }
  .pad .pnote { font-size: 0.5rem; }

  .thead { gap: 8px; }
  .thead .tname { min-width: 52px; }
  .octctl .tbtn { min-width: 40px; min-height: 40px; }
}

@media (max-width: 380px) {
  .cell { height: 28px; }
  .rlabel { width: 26px; flex-basis: 26px; }
  .pad { min-width: 38px; }
}


/* phone: kill any residual horizontal overflow from flex/grid min-content */
@media (max-width: 640px) {
  html, body { overflow-x: hidden; max-width: 100%; }
  .studio, .transport, .track, .grid, .lane, .cells, .thead, .playbar, .pads,
  .ruler, .ruler .dots, .ctrl, .transport > *, .thead > * { min-width: 0; }
  .transport select, .thead select { max-width: 100%; }
  .track { overflow: hidden; }
}

.tbtn.held { background: rgba(255,77,157,0.32); border-color: rgba(255,77,157,0.85); color: #ffd0e4; }