/* ============================================================
   MIDI Player — page-specific styles
   Dark theme, uses design tokens from /css/styles.css
   ============================================================ */

.midi-page {
  --bg: #0C1A14;
  --bg-card: #12251B;
  --bg-card-border: #1F4B34;
  --text: #E8F5EE;
  --text-dim: #7CA88E;
  --accent: #10B981;
  --accent-hover: #059669;
  --red: #EF4444;
  --white-key: #F5F0E8;
  --white-key-active: #d4eadd;
  --black-key: #1a1a1a;
  --black-key-active: #2d5a3f;
}

/* ── Layout ── */
.midi-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 120px;
  background: var(--bg);
  min-height: 100vh;
}

body:has(.midi-page) { background: #0C1A14; }
body:has(.midi-page) .nav { background: rgba(12, 26, 20, 0.92); border-bottom-color: #1F4B34; }
body:has(.midi-page) .nav__menu a { color: #7CA88E; }
body:has(.midi-page) .nav__menu a:hover,
body:has(.midi-page) .nav__menu a.active { color: #10B981; }
body:has(.midi-page) .footer { background: #0A1610; color: #7CA88E; }
body:has(.midi-page) .footer h4 { color: #E8F5EE; }
body:has(.midi-page) .footer a { color: #7CA88E; }
body:has(.midi-page) .footer a:hover { color: #10B981; }
body:has(.midi-page) .footer__bottom { border-top-color: #1F4B34; color: #5A8A6E; }
body:has(.midi-page) .footer__brand p,
body:has(.midi-page) .footer .loc { color: #5A8A6E; }

.midi-page h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--text);
  margin-bottom: 8px;
  text-align: center;
}
.midi-page .page-subtitle {
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 32px;
  text-align: center;
}
.midi-page .page-subtitle strong { color: var(--text); font-weight: 500; }

/* ── Cards ── */
.midi-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 12px;
}
.midi-card--canvas { padding: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.midi-card--keyboard { padding: 8px 0; overflow-x: auto; }

/* ── Upload Zone ── */
.midi-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  border: 2px dashed var(--bg-card-border);
  border-radius: var(--radius);
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}
.midi-upload.dragover {
  border-color: var(--accent);
  background: rgba(16, 185, 129, 0.05);
}
.midi-upload__icon { color: var(--text-dim); opacity: 0.5; }
.midi-upload__text { color: var(--text-dim); margin: 12px 0 4px; font-size: 0.9375rem; }
.midi-upload__text strong { color: var(--text); }
.midi-upload__or { color: var(--text-dim); font-size: 0.8125rem; opacity: 0.5; margin: 8px 0; }
.midi-upload__btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  border: none;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.midi-upload__btn:hover { background: var(--accent-hover); }
.midi-upload__btn--change {
  margin-top: 12px;
  background: transparent;
  border: 1px solid var(--bg-card-border);
  color: var(--text-dim);
}
.midi-upload__btn--change:hover { border-color: var(--accent); color: var(--text); }
.midi-upload__demo {
  margin-top: 10px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.8125rem;
  text-decoration: underline;
  cursor: pointer;
  font-family: var(--font-mono);
}
.midi-upload__demo:hover { color: var(--accent); }

/* ── Song Info Bar ── */
.midi-song-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  flex-wrap: wrap;
}
.midi-song-bar__name { color: var(--text); font-weight: 600; }
.midi-song-bar__sep { color: var(--bg-card-border); }
.midi-song-bar__stat { color: var(--text-dim); }
.midi-song-bar__stat span { color: var(--text); font-weight: 500; }
.midi-song-bar__change {
  margin-left: auto;
  padding: 4px 14px;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}
.midi-song-bar__change:hover { border-color: var(--accent); color: var(--text); }

/* ── Settings Panel ── */
.midi-settings { padding: 16px 24px; }
.midi-settings__row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
}
.midi-settings__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-dim);
}
.midi-settings__label {
  font-family: var(--font-mono);
  font-weight: 500;
  white-space: nowrap;
}
.midi-settings__value {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
  min-width: 42px;
  text-align: center;
}
.midi-settings__slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-card-border);
  outline: none;
  cursor: pointer;
}
.midi-settings__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: none; cursor: pointer;
}
.midi-settings__slider::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: none; cursor: pointer;
}
.midi-settings__toggle {
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-card-border);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.midi-settings__toggle:hover { border-color: var(--accent); color: var(--text); }
.midi-settings__toggle.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Canvas ── */
#fallingCanvas {
  display: block;
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
}

/* ── Piano Keyboard (display-only) ── */
.midi-keyboard-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.midi-keyboard {
  display: flex;
  position: relative;
  height: 120px;
  min-width: fit-content;
  margin: 0 auto;
  user-select: none;
}
.midi-key-white {
  position: relative;
  width: 18px;
  height: 120px;
  background: var(--white-key);
  border: 1px solid #c8c0b0;
  border-radius: 0 0 3px 3px;
  flex-shrink: 0;
  z-index: 1;
  transition: background 0.06s;
}
.midi-key-white.active {
  background: var(--white-key-active);
  box-shadow: inset 0 -3px 6px rgba(16, 185, 129, 0.4);
}
.midi-key-black {
  position: absolute;
  width: 12px;
  height: 75px;
  background: var(--black-key);
  border-radius: 0 0 3px 3px;
  z-index: 2;
  transition: background 0.06s;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
}
.midi-key-black.active {
  background: var(--black-key-active);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* ── Key Labels ── */
.midi-key-label {
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 500;
  pointer-events: none;
  white-space: nowrap;
}
.midi-key-white .midi-key-label { color: #888; }
.midi-key-black .midi-key-label { color: #aaa; font-size: 0.4375rem; }

/* ── Transport Bar ── */
.midi-transport {
  position: sticky;
  bottom: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background: rgba(18, 37, 27, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.midi-transport__btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--bg-card-border);
  background: transparent;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.midi-transport__btn:hover { border-color: var(--accent); color: var(--text); }
.midi-transport__btn--play {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}
.midi-transport__btn--play:hover { background: var(--accent-hover); }
.midi-transport__btn--play.playing { background: var(--accent-hover); }
.midi-transport__time {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-dim);
  white-space: nowrap;
  min-width: 90px;
  flex-shrink: 0;
}
.midi-transport__progress {
  flex: 1;
  position: relative;
  height: 6px;
  background: var(--bg-card-border);
  border-radius: 3px;
  min-width: 80px;
}
.midi-transport__progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  width: 0%;
  pointer-events: none;
}
.midi-transport__progress-input {
  position: absolute;
  top: -8px;
  left: 0;
  width: 100%;
  height: 22px;
  opacity: 0;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.midi-transport__ctrl {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-shrink: 0;
}
.midi-transport__ctrl input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-card-border);
  outline: none;
  cursor: pointer;
}
.midi-transport__ctrl input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}
.midi-transport__ctrl input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}

/* ── Info Sections ── */
.midi-info {
  margin-top: 32px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
}
.midi-info + .midi-info { margin-top: 20px; }
.midi-info h2 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--text);
  margin-bottom: 16px;
}
.midi-info ol {
  margin: 0;
  padding-left: 20px;
  color: var(--text-dim);
  line-height: 1.8;
}
.midi-info ol strong { color: var(--text); font-weight: 500; }
.midi-info p {
  margin: 12px 0 0;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}
.midi-info p:first-of-type { margin-top: 0; }
.midi-info a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.midi-info a:hover { opacity: 0.8; }
.midi-info--links { background: transparent; border: none; padding: 0 4px; text-align: center; }
.midi-info--links p { opacity: 0.6; font-size: 0.85rem; }
.midi-keys-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  margin-top: 12px;
  font-size: 0.875rem;
}
.midi-keys-grid kbd {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-align: center;
}
.midi-keys-grid span { color: var(--text-dim); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .midi-page { padding: 32px 12px 100px; }
  .midi-card { padding: 16px 12px; }
  #fallingCanvas { height: 300px; }
  .midi-keyboard { height: 90px; }
  .midi-key-white { width: 14px; height: 90px; }
  .midi-key-black { width: 9px; height: 56px; }
  .midi-transport { gap: 8px; padding: 10px 12px; flex-wrap: wrap; }
  .midi-settings__row { gap: 12px; }
  .midi-settings__slider { width: 60px; }
}
@media (max-width: 480px) {
  #fallingCanvas { height: 250px; }
  .midi-key-white { width: 11px; height: 70px; }
  .midi-key-black { width: 7px; height: 44px; }
}