/* ===== TetaLink EMDR — Design System ===== */

:root {
  --bg: #0a0e1a;
  --bg-light: #0f1424;
  --surface: #151a2e;
  --surface-hover: #1a2038;
  --border: #1e2744;
  --border-active: #4ecdc4;

  --text: #e8eaf0;
  --text-secondary: #7a82a0;
  --text-muted: #4a5270;

  --accent: #4ecdc4;
  --accent-hover: #3dbdb5;
  --accent-purple: #7c5cbf;
  --accent-purple-hover: #6a4daa;
  --accent-orange: #f7a44c;
  --accent-red: #e74c6f;
  --accent-green: #4caf7d;

  --radius: 0.75rem;
  --radius-lg: 1.25rem;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.4);
}

/* ===== Light Theme ===== */
[data-theme="light"] {
  --bg: #f5f7fa;
  --bg-light: #edf0f5;
  --surface: #ffffff;
  --surface-hover: #f0f2f7;
  --border: #d8dde6;
  --border-active: #2ba89e;

  --text: #1a2233;
  --text-secondary: #5a6580;
  --text-muted: #97a0b5;

  --accent: #2ba89e;
  --accent-hover: #239088;
  --accent-purple: #6a4daa;
  --accent-purple-hover: #5a3f95;
  --accent-orange: #e08c30;
  --accent-red: #d43a5d;
  --accent-green: #3a9e6a;

  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] input[type="range"]::-webkit-slider-thumb {
  box-shadow: 0 0 8px rgba(43, 168, 158, 0.3);
  border-color: #fff;
}

[data-theme="light"] .preset-swatch.active {
  box-shadow: 0 0 8px rgba(43, 168, 158, 0.4);
}

[data-theme="light"] .toggle-slider::before {
  background: white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

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

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== Common Components ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface-hover); border-color: var(--text-muted); }

.btn-danger {
  background: rgba(231, 76, 111, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(231, 76, 111, 0.3);
}
.btn-danger:hover { background: rgba(231, 76, 111, 0.25); }

.btn-success {
  background: var(--accent-green);
  color: white;
}
.btn-success:hover { background: #3d9e6e; }

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

/* ===== Control Groups ===== */

.control-group {
  margin-bottom: 1.25rem;
}

.control-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ===== Range Slider ===== */

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px rgba(78, 205, 196, 0.3);
  transition: transform 0.15s;
}

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

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--bg);
}

.range-value {
  min-width: 3rem;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ===== Color Picker ===== */

input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 36px;
  height: 36px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  background: transparent;
  padding: 2px;
}

input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: calc(var(--radius) - 4px);
}

/* ===== Select Buttons (toggle group) ===== */

.select-group {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.select-btn {
  padding: 0.5rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.select-btn:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.select-btn.active {
  background: rgba(78, 205, 196, 0.12);
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Video Containers ===== */

.video-container {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-light);
  border: 1px solid var(--border);
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-label {
  position: absolute;
  bottom: 0.5rem;
  left: 0.5rem;
  padding: 0.2rem 0.6rem;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 0.4rem;
  font-size: 0.7rem;
  font-weight: 500;
  color: white;
  backdrop-filter: blur(4px);
}

.video-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  height: 100%;
  min-height: 120px;
}

/* ===== Status Badge ===== */

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-waiting {
  background: rgba(247, 164, 76, 0.12);
  color: var(--accent-orange);
}
.status-waiting::before { background: var(--accent-orange); }

.status-connected {
  background: rgba(76, 175, 125, 0.12);
  color: var(--accent-green);
}
.status-connected::before { background: var(--accent-green); animation: pulse 2s infinite; }

.status-disconnected {
  background: rgba(231, 76, 111, 0.12);
  color: var(--accent-red);
}
.status-disconnected::before { background: var(--accent-red); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ===== Panel ===== */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.panel-title {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Divider ===== */

.divider {
  height: 1px;
  background: var(--border);
  margin: 1.25rem 0;
}

/* ===== Toggle Switch ===== */

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle input {
  display: none;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle input:checked + .toggle-slider {
  background: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* ===== Tooltip ===== */

[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 0.4rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.75rem;
  color: var(--text);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
}

[data-tooltip]:hover::after {
  opacity: 1;
}

/* ===== Presets Grid ===== */

.preset-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.preset-swatch {
  width: 32px;
  height: 32px;
  border-radius: 0.5rem;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all 0.15s;
}

.preset-swatch:hover {
  transform: scale(1.15);
}

.preset-swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(78, 205, 196, 0.4);
}

/* ===== Theme Toggle Button ===== */

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon { display: none; }

[data-theme="light"] .theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
:root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }

/* Fix: default state */
.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none !important; }
[data-theme="light"] .theme-toggle .icon-moon { display: block !important; }