/* VL-1 Hybrid retro-clean
 * Casio-Farben (Beige + LCD-Gruen), aber aufgeraeumtes Layout
 * + grosse Touch-Targets. */

:root {
  --bg:        #14171a;
  --case:      #c4b394;
  --case-dark: #8e7f64;
  --case-edge: #6b5e48;
  --lcd-bg:    #8da18a;
  --lcd-dim:   #647560;
  --lcd-text:  #1a1f17;
  --key-white: #f4eedb;
  --key-white-edge: #c8c0a6;
  --key-black: #2a241c;
  --key-press: #d97a3f;
  --accent:    #d97a3f;
  --btn-bg:    #d8cab0;
  --btn-fg:    #2a241c;
  --btn-edge:  #9c8d72;
  --shadow:    0 6px 20px rgba(0,0,0,0.45);
  --font-lcd:  'Courier New', ui-monospace, monospace;
  --font-ui:   system-ui, -apple-system, 'Helvetica Neue', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  font-family: var(--font-ui);
  color: #eee;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  overflow-x: hidden;
}

/* ----- Splash ----- */
.splash {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, #2a2d30 0%, #0a0c0e 100%);
  display: grid;
  place-items: center;
  z-index: 1000;
  transition: opacity .4s;
}
.splash.hidden { opacity: 0; pointer-events: none; }
.splash-inner { text-align: center; padding: 2rem; }
.splash-inner h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  letter-spacing: 0.3em;
  margin: 0 0 .3rem;
  color: var(--case);
}
.tagline { color: #888; margin: 0 0 2rem; letter-spacing: .15em; font-size: .9rem; }
.power-btn {
  font-family: var(--font-ui);
  font-weight: 700;
  letter-spacing: .2em;
  padding: 1.2rem 2.5rem;
  background: var(--lcd-bg);
  color: var(--lcd-text);
  border: 3px solid var(--case-edge);
  border-radius: 12px;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .1s, background .2s;
}
.power-btn:hover { background: #a5bba0; }
.power-btn:active { transform: scale(0.97); }
.splash-inner .hint { color: #666; font-size: .8rem; margin-top: 1.5rem; }

/* ----- Device ----- */
.device {
  max-width: 920px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: linear-gradient(180deg, var(--case) 0%, #b8a78a 100%);
  border: 1px solid var(--case-edge);
  border-radius: 18px;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.3);
  color: var(--case-edge);
}

.brand {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 1rem;
  margin-bottom: 1.2rem;
  border-bottom: 1px solid var(--case-dark);
}
.brand-left { display: flex; gap: 1rem; align-items: baseline; }
.logo {
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: .15em;
  color: var(--key-black);
}
.model {
  font-size: .8rem;
  letter-spacing: .25em;
  color: var(--case-dark);
}
.brand-right {
  font-weight: 800;
  color: var(--accent);
  letter-spacing: .1em;
}

/* ----- Top Row: LCD + Octave ----- */
.top-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.2rem;
  margin-bottom: 1.5rem;
  align-items: stretch;
}

.lcd-wrap {
  background: linear-gradient(180deg, var(--lcd-dim) 0%, var(--lcd-bg) 100%);
  border: 3px solid var(--case-edge);
  border-radius: 8px;
  padding: .9rem 1.2rem;
  box-shadow: inset 0 2px 8px rgba(0,0,0,.4);
}
.lcd {
  font-family: var(--font-lcd);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  color: var(--lcd-text);
  text-align: right;
  letter-spacing: .15em;
  min-height: 1.2em;
  text-shadow: 0 0 1px rgba(0,0,0,.5);
}
.lcd-label {
  font-size: .65rem;
  letter-spacing: .2em;
  color: var(--lcd-text);
  opacity: .6;
  text-align: right;
  margin-top: .3rem;
}

/* ----- Controls Row: Tones + Slider ----- */
.controls-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  align-items: end;
}

.group-label {
  display: block;
  font-size: .7rem;
  letter-spacing: .25em;
  color: var(--case-dark);
  margin-bottom: .4rem;
  font-weight: 700;
}

/* Tone-Selector */
.tone-selector .tone-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: .5rem;
}
.tone-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .15rem;
  padding: .7rem .4rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 8px;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: all .1s;
  min-height: 64px;
}
.tone-btn .num { font-weight: 800; font-size: 1.1rem; }
.tone-btn .name { font-size: .7rem; opacity: .75; }
.tone-btn:hover { background: #e0d2b8; }
.tone-btn:active { transform: translateY(1px); }
.tone-btn.active {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
  box-shadow: 0 0 0 2px rgba(217,122,63,.3);
}
.tone-btn.active .name { opacity: 1; }

/* Octave-Switch */
.octave-switch .octave-grid {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}
.oct-btn {
  padding: .55rem 1rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 6px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: .75rem;
  letter-spacing: .15em;
  cursor: pointer;
  min-width: 80px;
}
.oct-btn:hover { background: #e0d2b8; }
.oct-btn.active {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
}

/* Slider */
.slider-section { min-width: 160px; }
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--case-dark);
  border-radius: 4px;
  outline: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  background: var(--accent);
  border: 2px solid #a4571f;
  border-radius: 50%;
  cursor: pointer;
}
.slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--accent);
  border: 2px solid #a4571f;
  border-radius: 50%;
  cursor: pointer;
}

/* ----- Rhythm Row ----- */
.rhythm-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.2rem;
  margin-bottom: 1.5rem;
  align-items: end;
}

.rhythm-selector .rhythm-grid {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: .35rem;
}
.rhythm-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .1rem;
  padding: .5rem .25rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 6px;
  font-family: var(--font-ui);
  cursor: pointer;
  min-height: 54px;
}
.rhythm-btn .num { font-weight: 800; font-size: .95rem; }
.rhythm-btn .name { font-size: .55rem; opacity: .75; letter-spacing: .05em; text-transform: uppercase; }
.rhythm-btn:hover { background: #e0d2b8; }
.rhythm-btn.active {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
}

/* Tempo */
.tempo-controls { min-width: 150px; text-align: center; }
.tempo-row {
  display: flex;
  align-items: center;
  gap: .4rem;
  justify-content: center;
}
.tempo-btn {
  width: 38px;
  height: 38px;
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 50%;
  cursor: pointer;
}
.tempo-btn:hover { background: var(--accent); color: white; border-color: #a4571f; }
.tempo-btn:active { transform: translateY(1px); }
.tempo-display {
  font-family: var(--font-lcd);
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--lcd-text);
  background: var(--lcd-bg);
  border: 2px solid var(--case-edge);
  border-radius: 6px;
  padding: .15rem .8rem;
  min-width: 60px;
}
.tempo-unit { font-size: .65rem; letter-spacing: .2em; color: var(--case-dark); margin-top: .3rem; }

.balance-legend {
  display: flex;
  justify-content: space-between;
  font-size: .55rem;
  letter-spacing: .2em;
  color: var(--case-dark);
  margin-top: .1rem;
}

/* ----- Sequencer Panel (REC/PLAY) ----- */
.seq-panel {
  background: linear-gradient(180deg, rgba(217,122,63,.12), rgba(0,0,0,.15));
  border: 2px solid var(--accent);
  border-radius: 10px;
  padding: .8rem 1.2rem;
  margin-bottom: 1.5rem;
}
.seq-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: .5rem;
}
.seq-count {
  font-family: var(--font-lcd);
  font-weight: 800;
  color: var(--accent);
  font-size: .9rem;
}
.seq-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.seq-btn {
  padding: .55rem 1.1rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 6px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: .85rem;
  cursor: pointer;
  letter-spacing: .1em;
}
.seq-btn:hover { background: #e0d2b8; }
.seq-btn.active, .seq-btn:active {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
}
.seq-btn.danger { background: #c79a7a; }
.seq-btn.danger:hover { background: #d97a3f; color: white; }
.seq-hint { font-size: .75rem; color: var(--case-dark); }

/* ----- ADSR Panel (Tone 6) ----- */
.adsr-panel {
  background: rgba(0,0,0,.12);
  border: 2px solid var(--case-dark);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  margin-bottom: 1.5rem;
}
.adsr-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: .6rem;
}
.adsr-wave-name {
  font-weight: 800;
  color: var(--accent);
  letter-spacing: .12em;
  font-size: .85rem;
}
.adsr-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: .35rem;
  margin-bottom: .8rem;
}
.adsr-slot {
  background: var(--lcd-bg);
  border: 2px solid var(--case-edge);
  border-radius: 6px;
  padding: .4rem .2rem;
  text-align: center;
  cursor: pointer;
  transition: all .1s;
}
.adsr-slot:hover { background: #a5bba0; }
.adsr-slot.selected {
  background: var(--accent);
  border-color: #6b2a0a;
  box-shadow: 0 0 0 3px rgba(217,122,63,.4);
}
.adsr-slot.selected .adsr-label,
.adsr-slot.selected .adsr-hint,
.adsr-slot.selected .adsr-digit { color: #fff; }
.adsr-label {
  font-size: .55rem;
  letter-spacing: .15em;
  color: var(--lcd-text);
  opacity: .7;
  font-weight: 700;
}
.adsr-digit {
  font-family: var(--font-lcd);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--lcd-text);
  line-height: 1.1;
}
.adsr-hint {
  font-size: .5rem;
  color: var(--lcd-text);
  opacity: .5;
  margin-top: .15rem;
}
.adsr-preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: .5rem;
}
.adsr-preset {
  padding: .4rem .8rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-edge);
  border-radius: 5px;
  font-size: .75rem;
  cursor: pointer;
  font-family: var(--font-ui);
}
.adsr-preset:hover { background: var(--accent); color: white; }
.adsr-hint-row {
  font-size: .72rem;
  color: var(--case-dark);
  margin: .4rem 0 0;
}
.adsr-hint-row code {
  background: rgba(0,0,0,.2);
  padding: .1rem .4rem;
  border-radius: 3px;
  color: var(--lcd-bg);
  font-family: var(--font-lcd);
}

@media (max-width: 640px) {
  .adsr-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ----- Mode Switch ----- */
.mode-row { margin-bottom: 1.2rem; }
.mode-switch .mode-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .4rem;
}
.mode-btn {
  padding: .65rem .4rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 6px;
  font-family: var(--font-ui);
  font-weight: 700;
  letter-spacing: .15em;
  font-size: .8rem;
  cursor: pointer;
}
.mode-btn:hover { background: #e0d2b8; }
.mode-btn.active {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
  box-shadow: 0 0 0 2px rgba(217,122,63,.3);
}

/* ----- Bottom Row: Keypad + Keyboard ----- */
.bottom-row {
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 1.2rem;
  align-items: stretch;
}

.keypad .keypad-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .35rem;
}
.calc-btn {
  padding: .8rem .3rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-edge);
  border-radius: 7px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform .05s, background .1s;
  min-height: 44px;
}
.calc-btn:hover { background: #e0d2b8; }
.calc-btn:active, .calc-btn.flash {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
  transform: scale(0.97);
}
.calc-btn.op {
  background: #a89476;
  color: #fff8e8;
  border-color: #6b5e48;
}
.calc-btn.op:hover { background: #b8a484; }
.calc-btn.fn {
  background: #b8a690;
  color: var(--btn-fg);
}
.calc-btn.clr {
  background: #c79a7a;
  color: #2a1a10;
  border-color: #8a5e44;
}
.calc-btn.mem {
  background: #98876e;
  color: #fff8e8;
  font-size: .85rem;
  border-color: #5e503c;
}
.calc-btn.zero { /* breitere Null */ }
.calc-btn.eq {
  background: var(--accent);
  color: white;
  border-color: #a4571f;
}

/* Tone-by-Number Quirk */
.tone-by-number {
  display: flex;
  gap: .4rem;
  margin-top: .5rem;
  flex-wrap: wrap;
}
.tbn-btn {
  flex: 1;
  min-width: 130px;
  padding: .5rem;
  background: #98876e;
  color: #fff8e8;
  border: 1px solid #5e503c;
  border-radius: 5px;
  font-size: .7rem;
  letter-spacing: .08em;
  cursor: pointer;
  font-weight: 700;
}
.tbn-btn:hover { background: var(--accent); border-color: #a4571f; }

/* CAL-Mode highlight */
body[data-mode="CAL"] .keypad { box-shadow: 0 0 0 3px rgba(217,122,63,.35); border-radius: 10px; padding: .5rem; }
body[data-mode="OFF"] .keypad, body[data-mode="OFF"] .keyboard-section,
body[data-mode="OFF"] .tone-selector, body[data-mode="OFF"] .rhythm-selector {
  opacity: .35; pointer-events: none;
}

/* ----- Keyboard ----- */
.keyboard-section {
  background: linear-gradient(180deg, #2a241c, #1a1610);
  padding: 1.2rem;
  border-radius: 10px;
  border: 2px solid var(--case-edge);
  box-shadow: inset 0 2px 6px rgba(0,0,0,.5);
}

.keyboard {
  position: relative;
  height: 180px;
  --white-count: 9;
}

.whites {
  display: grid;
  grid-template-columns: repeat(var(--white-count), 1fr);
  gap: 3px;
  height: 100%;
}
.blacks {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 62%;
  pointer-events: none;
}

.key {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: .4rem;
  border: none;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: background .05s;
  border-radius: 0 0 4px 4px;
}

.key.white {
  background: linear-gradient(180deg, var(--key-white) 70%, #d9d0b3 100%);
  border: 1px solid var(--key-white-edge);
  border-top: none;
  color: #6b5e48;
}
.key.white .note { font-weight: 700; font-size: .85rem; }
.key.white .hint { font-size: .65rem; opacity: .5; margin-top: .15rem; }
.key.white:hover { background: linear-gradient(180deg, #fffaeb 70%, #dfd6b8 100%); }
.key.white.pressed {
  background: linear-gradient(180deg, var(--key-press) 0%, #b8631d 100%);
  color: white;
}

.key.black {
  position: absolute;
  width: calc(100% / var(--white-count) * 0.6);
  height: 100%;
  left: calc(var(--white-pos) / var(--white-count) * 100% - (100% / var(--white-count) * 0.3));
  background: linear-gradient(180deg, var(--key-black) 0%, #4a3f2f 100%);
  border: 1px solid #0a0805;
  color: #c4b394;
  pointer-events: auto;
  z-index: 2;
}
.key.black .note { font-weight: 700; font-size: .7rem; }
.key.black .hint { font-size: .55rem; opacity: .55; margin-top: .1rem; }
.key.black:hover { background: linear-gradient(180deg, #3a3225 0%, #5a4d3a 100%); }
.key.black.pressed {
  background: linear-gradient(180deg, var(--key-press) 0%, #8e4e16 100%);
  color: white;
}

.kbd-hint {
  margin: .8rem 0 0;
  color: var(--case-dark);
  font-size: .75rem;
  text-align: center;
}
.kbd-hint code {
  background: rgba(0,0,0,.2);
  padding: .15rem .4rem;
  border-radius: 3px;
  font-family: var(--font-lcd);
  color: var(--lcd-bg);
  letter-spacing: .1em;
}

/* ===== Responsive: iPhone / iPad / Desktop ===== */

/* ---- iPhone Portrait: Sticky-Klaviatur am unteren Rand ----
   Tasten sind IMMER sichtbar, der Rest scrollt darüber hinweg.
   Wie beim analogen Casio VL-1: Klaviatur ist nie weg. */
@media (max-width: 767px) and (orientation: portrait) {
  body {
    padding-bottom: 180px; /* Platz fürs fixed Keyboard */
  }
  .device {
    margin: 0;
    border-radius: 0;
    padding: 0.7rem;
    box-shadow: none;
  }
  .top-row,
  .controls-row,
  .rhythm-row,
  .bottom-row {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }
  .octave-switch .octave-grid { flex-direction: row; }
  .tone-selector .tone-grid { grid-template-columns: repeat(3, 1fr); }
  .rhythm-selector .rhythm-grid { grid-template-columns: repeat(5, 1fr); }
  .mode-switch .mode-grid { grid-template-columns: repeat(5, 1fr); }

  /* Klaviatur raus aus dem Flow, fix am unteren Bildschirmrand */
  .keyboard-section {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 60;
    border-radius: 0;
    border: none;
    border-top: 3px solid var(--case-edge);
    padding: 0.55rem 0.7rem 0.7rem;
    background: linear-gradient(180deg, #2a241c, #1a1610);
    box-shadow: 0 -10px 28px rgba(0,0,0,0.55);
  }
  .keyboard { height: 130px; }
  .key.white .hint, .key.black .hint { display: none; }
  .kbd-hint { display: none; }
}

/* ---- iPhone Landscape: kompaktes VL-1, kein Sticky nötig ---- */
@media (max-width: 1023px) and (orientation: landscape) and (max-height: 600px) {
  .device {
    margin: 0;
    border-radius: 0;
    padding: 0.5rem 0.8rem;
  }
  .top-row,
  .controls-row,
  .rhythm-row,
  .bottom-row {
    gap: 0.6rem;
  }
  .keyboard { height: 110px; }
  .key.white .hint, .key.black .hint { display: none; }
  .kbd-hint { display: none; }
}

/* ---- iPad Portrait: volles VL-1 Layout, leicht kompakter ---- */
@media (min-width: 768px) and (max-width: 1023px) and (orientation: portrait) {
  .device {
    margin: 1rem auto;
    max-width: 96vw;
    padding: 1.3rem;
  }
  .keyboard { height: 200px; }
}

/* ---- iPad Landscape + Desktop: echtes VL-1 mit 3D-Perspektive ----
   Subtile Neigung wie ein in den Händen gehaltenes Casio.
   Hover (Desktop) richtet das Gerät leicht auf. */
@media (min-width: 1024px) and (orientation: landscape) {
  html, body {
    min-height: 100vh;
  }
  body {
    perspective: 2400px;
    perspective-origin: 50% 40%;
    margin: 0;
    padding: 2rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at center top, #1f2226 0%, #0a0c0e 65%);
  }
  .device {
    margin: 0;
    max-width: 1040px;
    width: 92vw;
    transform: rotateX(6deg) rotateY(-1.5deg);
    transform-origin: 50% 70%;
    transform-style: preserve-3d;
    border-radius: 22px;
    box-shadow:
      0 50px 90px -20px rgba(0,0,0,0.78),
      0 24px 48px -15px rgba(0,0,0,0.55),
      0 0 0 1px var(--case-edge),
      inset 0 1px 0 rgba(255,255,255,0.35),
      inset 0 -4px 10px rgba(0,0,0,0.18);
    transition: transform .5s ease;
  }
  .device:hover {
    transform: rotateX(4deg) rotateY(-0.5deg);
  }
  .keyboard { height: 220px; }
}