/* ==========================================================
   Cymatics Sand Simulator - style.css
   暗い実験室のようなデザイン。黒背景 + 少し明るい黒の振動板 + 白い砂粒。
   ========================================================== */

:root {
  --color-bg: #0a0a0b;
  --color-panel: #141416;
  --color-plate: #1c1c1f;
  --color-plate-edge: #2c2c30;
  --color-text: #e8e6e1;
  --color-text-dim: #9a9a9f;
  --color-accent: #7fd8d0;
  --color-accent-dim: #3a5a56;
  --color-btn-bg: #1f1f23;
  --color-btn-bg-hover: #2a2a2f;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP",
               -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

/* ---------------- Header ---------------- */

.app-header {
  padding: 14px 16px 10px;
  text-align: center;
  flex-shrink: 0;
}

.app-title {
  margin: 0 0 8px;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.info-row {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.info-item {
  white-space: nowrap;
}

.info-item span {
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

/* ---------------- Stage (Canvas area) ---------------- */

.stage-area {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  min-height: 0;
}

#plateCanvas {
  background: var(--color-plate);
  border: 1px solid var(--color-plate-edge);
  border-radius: 6px;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.4), 0 12px 40px rgba(0,0,0,0.55);
  touch-action: none;
  max-width: 100%;
  max-height: 100%;
  display: block;
}

/* ---------------- Control panel ---------------- */

.control-panel {
  flex-shrink: 0;
  padding: 12px 16px calc(16px + var(--safe-bottom));
  background: var(--color-panel);
  border-top: 1px solid #202024;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.buttons-row {
  justify-content: center;
  gap: 12px;
}

.control-btn {
  flex: 1 1 auto;
  max-width: 220px;
  min-height: 48px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-btn-bg);
  border: 1px solid #2f2f34;
  border-radius: 8px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

.control-btn:active {
  transform: scale(0.97);
  background: var(--color-btn-bg-hover);
}

.control-btn.primary {
  background: var(--color-accent-dim);
  border-color: #4d726d;
  color: #eafffb;
}

.slider-row label {
  flex: 0 0 68px;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.slider-row input[type="range"] {
  flex: 1 1 auto;
  width: 100%;
  height: 34px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  touch-action: none;
}

.slider-value {
  flex: 0 0 64px;
  text-align: right;
  font-size: 0.8rem;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

/* Range track / thumb styling (WebKit) */
.slider-row input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: #2b2b30;
}
.slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px;
  height: 26px;
  margin-top: -10px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid #0a0a0b;
  box-shadow: 0 0 0 1px #4d726d;
}

/* Range track / thumb styling (Firefox) */
.slider-row input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: #2b2b30;
}
.slider-row input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid #0a0a0b;
}

/* [hidden] を確実に非表示にする（.control-row の display:flex に負けないように） */
[hidden] {
  display: none !important;
}

/* ---------------- Mode switch (手動 / マイク) ---------------- */

.mode-switch-row {
  justify-content: center;
  gap: 0;
  background: var(--color-btn-bg);
  border: 1px solid #2f2f34;
  border-radius: 8px;
  padding: 3px;
}

.mode-btn {
  flex: 1 1 50%;
  min-height: 42px;
  padding: 8px 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-dim);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.mode-btn.active {
  background: var(--color-accent-dim);
  color: #eafffb;
}

/* ---------------- Mic panel ---------------- */

.mic-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mic-error {
  margin: 0;
  padding: 10px 12px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: #ffd7d0;
  background: #3a1f1c;
  border: 1px solid #6b3a33;
  border-radius: 8px;
}

.mic-status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 14px;
  width: 100%;
  padding: 10px 12px;
  background: var(--color-btn-bg);
  border: 1px solid #2f2f34;
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--color-text-dim);
}

.mic-status-item span {
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.mic-meter {
  display: inline-block;
  width: 60px;
  height: 8px;
  margin-left: 6px;
  vertical-align: middle;
  background: #2b2b30;
  border-radius: 4px;
  overflow: hidden;
}

.mic-meter-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  transition: width 0.05s linear;
}

/* ---------------- Responsive ---------------- */

@media (min-width: 700px) {
  .app-title {
    font-size: 1.5rem;
  }
  .control-panel {
    max-width: 700px;
    margin: 0 auto;
    width: 100%;
    border-radius: 10px 10px 0 0;
  }
}

@media (max-width: 420px) {
  .mic-status-grid {
    grid-template-columns: 1fr;
  }
}

@media (orientation: landscape) and (max-height: 500px) {
  .app-header {
    padding: 8px 16px 6px;
  }
  .app-title {
    font-size: 1.05rem;
    margin-bottom: 4px;
  }
  .control-panel {
    padding: 8px 16px calc(10px + var(--safe-bottom));
    gap: 8px;
  }
  .control-btn {
    min-height: 40px;
  }
}