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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #0a0010;
  color: #e0e0e0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 20px;
  position: relative;
  overflow-x: hidden;
}

/* Lava background */
#lava-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.75;
}

#lava-bg svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* --- Controls panel hide/show during session --- */
#controlsPanel {
  max-height: 2000px;
  overflow: hidden;
  opacity: 1;
  transition: max-height 0.5s ease, opacity 0.4s ease;
}

#controlsPanel.hidden {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
}

.container {
  background: transparent;
  border-radius: 24px;
  padding: 40px;
  max-width: 900px;
  width: 100%;
  box-shadow: none;
  position: relative;
  z-index: 1;
  transition: background 0.6s ease;
}

.container.session-active {
  background: transparent;
}

.columns {
  display: flex;
  gap: 32px;
}

.col-left {
  flex: 1;
  min-width: 0;
}

.col-right {
  flex: 1;
  min-width: 0;
}

@media (max-width: 700px) {
  .container {
    max-width: 500px;
  }

  .columns {
    flex-direction: column;
    gap: 0;
  }
}

@media (min-width: 701px) {
  .buttons button {
    flex: 0 1 auto;
    padding: 14px 32px;
  }
}

h1 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 8px;
  color: #e94560;
  letter-spacing: 4px;
}

.subtitle {
  text-align: center;
  color: #888;
  margin-bottom: 30px;
  font-size: 0.9rem;
}

.control-group {
  margin-bottom: 24px;
}

.control-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: #c4c4c4;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.slider-row input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: #0f3460;
  outline: none;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #e94560;
  cursor: pointer;
  transition: transform 0.1s;
}

.slider-row input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.slider-row input[type="number"] {
  width: 80px;
  padding: 6px 8px;
  border: 1px solid #0f3460;
  border-radius: 6px;
  background: #1a1a2e;
  color: #e0e0e0;
  font-size: 0.9rem;
  text-align: center;
}

.slider-row input[type="number"]:focus {
  outline: none;
  border-color: #e94560;
}

.slider-row .unit {
  font-size: 0.85rem;
  color: #888;
  min-width: 30px;
}

.buttons {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  justify-content: center;
}

button {
  flex: 1;
  padding: 14px 20px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 1px;
}

button:active {
  transform: scale(0.97);
}

.btn-start {
  background: #e94560;
  color: #fff;
}

.btn-start:hover {
  background: #d63851;
}

.btn-start.running {
  background: #533483;
}

.btn-start.running:hover {
  background: #6a42a0;
}

.btn-test {
  background: #0f3460;
  color: #e0e0e0;
}

.btn-test:hover {
  background: #1a4a7a;
}

.status {
  text-align: center;
  margin-top: 20px;
  font-size: 0.9rem;
  color: #888;
  min-height: 20px;
}

.status.active {
  color: #e94560;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.play-count {
  text-align: center;
  margin-top: 8px;
  font-size: 0.85rem;
  color: #a7b0cc;
}

.info {
  font-size: 0.75rem;
  color: #b5bfdc;
  margin-top: 4px;
}

.sub-control {
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid #0f3460;
}

.sub-control label {
  font-size: 0.85rem;
  color: #999;
}

.advanced-section {
  margin-bottom: 8px;
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid #0f3460;
}

.advanced-section summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: #888;
  padding: 10px 0;
  user-select: none;
  outline: none;
}

.advanced-section summary:hover {
  color: #c4c4c4;
}

.advanced-section[open] summary {
  margin-bottom: 16px;
  color: #c4c4c4;
}

#curveSelect {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid #0f3460;
  border-radius: 6px;
  background: #1a1a2e;
  color: #e0e0e0;
  font-size: 0.9rem;
  margin-bottom: 12px;
  cursor: pointer;
}

#curveSelect:focus {
  outline: none;
  border-color: #e94560;
}

#curveCanvas {
  width: 100%;
  height: 120px;
  border-radius: 8px;
  background: #1a1a2e;
  border: 1px solid #0f3460;
  margin-bottom: 4px;
}

/* Presets */
.presets-group {
  margin-top: 24px;
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.btn-preset {
  flex: 0 1 auto;
  padding: 8px 16px;
  background: #0f3460;
  color: #c4c4c4;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0;
}

.btn-preset:hover {
  background: #1a4a7a;
  color: #fff;
}

.btn-preset-custom {
  position: relative;
  padding-right: 28px;
}

.btn-preset-delete {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #e94560;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 2px 4px;
  flex: 0;
}

.btn-preset-delete:hover {
  color: #ff6b81;
}

.preset-custom-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.preset-custom-row input[type="text"] {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid #0f3460;
  border-radius: 6px;
  background: #1a1a2e;
  color: #e0e0e0;
  font-size: 0.85rem;
}

.preset-custom-row input[type="text"]:focus {
  outline: none;
  border-color: #e94560;
}

.btn-preset-save {
  padding: 6px 14px;
  background: #533483;
  color: #e0e0e0;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  flex: 0 0 auto;
}

.btn-preset-save:hover {
  background: #6a42a0;
}

/* Cookie warning */
.cookie-warning {
  color: #e94560;
  font-size: 0.8rem;
  margin-top: 8px;
}

/* Cookie consent popup */
.cookie-popup {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #16213e;
  border: 1px solid #0f3460;
  border-radius: 12px;
  padding: 20px 28px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 1000;
  max-width: 420px;
  width: 90%;
  text-align: center;
}

.cookie-popup p {
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: #c4c4c4;
  line-height: 1.4;
}

.cookie-popup-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn-cookie-accept {
  padding: 8px 24px;
  background: #e94560;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-cookie-accept:hover {
  background: #d63851;
}

.btn-cookie-decline {
  padding: 8px 24px;
  background: #2a2a3e;
  color: #c4c4c4;
  border: 1px solid #0f3460;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-cookie-decline:hover {
  background: #3a3a50;
}

/* Sound file list */
#soundFileInput {
  display: block;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: #b5bfdc;
}

.sound-file-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sound-file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  background: #1a1a2e;
  border-radius: 4px;
  font-size: 0.8rem;
  color: #c4c4c4;
}

.sound-file-item .remove-sound {
  background: none;
  border: none;
  color: #e94560;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 2px 4px;
  flex: 0 0 auto;
}

.sound-file-item .remove-sound:hover {
  color: #ff6b81;
}

.sound-file-item .sound-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Semi-hidden performance panel --- */
.perf-section {
  margin-top: 24px;
  padding-left: 16px;
  border-left: 2px solid #0f3460;
  opacity: 0.82;
  transition: opacity 0.3s;
}

.perf-section:hover,
.perf-section[open] {
  opacity: 1;
}

.perf-section summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.8rem;
  color: #b8c2e6;
  padding: 6px 0;
  user-select: none;
  outline: none;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.perf-section summary:hover {
  color: #d7ddf8;
}

.perf-section[open] summary {
  margin-bottom: 12px;
  color: #d7ddf8;
}