/* ============================================
   LOCO - Cozy Background Webpage
   Design System & Core Styles
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Color Palette */
  --bg-overlay: rgba(0, 0, 0, 0.3);
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.7);
  --accent: rgba(255, 255, 255, 0.15);
  --accent-hover: rgba(255, 255, 255, 0.25);
  --shadow: rgba(0, 0, 0, 0.2);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-time: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Background Container --- */
.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  background: #0f0c29;
}

.background > * {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.background__image {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.background__image.active {
  opacity: 1;
}

.background__video {
  position: fixed;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  object-fit: cover;
  display: none;
}

.background__video.active {
  display: block;
}

/* --- Controls Base --- */
.controls {
  position: fixed;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--accent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 12px var(--shadow);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.controls--top {
  top: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
}

.controls--top.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(-20px);
  pointer-events: none;
}

/* --- Control Buttons --- */
.control-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.control-btn:hover {
  background: var(--accent-hover);
}

.control-btn:active {
  background: rgba(255, 255, 255, 0.35);
}

.control-btn svg {
  width: 20px;
  height: 20px;
  pointer-events: none;
}

.control-btn .icon {
  display: none;
}

.control-btn .icon--play,
.control-btn:not([data-state="playing"]) .icon--pause,
.control-btn:not([data-state="muted"]) .icon--volume {
  display: block;
}

.control-btn[data-state="playing"] .icon--play,
.control-btn[data-state="playing"] .icon--volume-mute {
  display: none;
}

.control-btn[data-state="playing"] .icon--pause {
  display: block;
}

.control-btn[data-state="muted"] .icon--volume {
  display: none;
}

.control-btn[data-state="muted"] .icon--volume-mute {
  display: block;
}

/* --- Track Name --- */
.track-name {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  user-select: none;
}

.volume-control-wrapper {
  position: relative;
}

/* --- Volume Slider --- */
.volume-slider-container {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%) rotate(-90deg);
  transform-origin: center center;
  display: flex;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  background: var(--accent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  width: fit-content;
}

.volume-slider-container.visible {
  opacity: 1;
  pointer-events: auto;
}

.volume-slider {
  width: 100px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--accent-hover);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  background: var(--text-primary);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--text-primary);
  cursor: pointer;
}


/* --- Background Selector Modal --- */
.bg-selector {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.bg-selector.active {
  opacity: 1;
  pointer-events: auto;
}

.bg-selector__content {
  background: var(--accent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 80vw;
  max-height: 80vh;
  overflow: auto;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.bg-selector.active .bg-selector__content {
  transform: scale(1);
}

.bg-selector__title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Background Grid --- */
.bg-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  max-width: 560px;
  margin: 0 auto;
}

.bg-grid__item {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.bg-grid__item:hover {
  transform: scale(1.03);
  border-color: var(--text-secondary);
}

.bg-grid__item.active {
  border-color: var(--text-primary);
}

.bg-grid__item__thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bg-grid__item__label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: var(--text-primary);
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.bg-grid__item:hover .bg-grid__item__label {
  opacity: 1;
}

.bg-grid__item__close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  backdrop-filter: blur(5px);
  border: none;
  border-radius: var(--radius-full);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.bg-grid__item__close:hover {
  background: var(--accent-hover);
}

.bg-grid__item__close svg {
  width: 16px;
  height: 16px;
}

/* --- Widget Area --- */
.widget-area {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

/* --- Widget Base --- */
.widget {
  text-align: center;
  user-select: none;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.widget.hidden {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
}

/* --- Clock Widget --- */
.widget--clock__time {
  font-family: var(--font-time);
  font-size: 6rem;
  font-weight: 200;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  line-height: 1;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.widget--clock__date {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: var(--spacing-sm);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
}

/* --- Zen Mode Indicator --- */
.zen-indicator {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 150;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--accent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.zen-indicator.visible {
  opacity: 1;
}

/* --- Utility Classes --- */
.hidden {
  display: none !important;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
  .controls {
    padding: var(--spacing-xs) var(--spacing-sm);
    gap: var(--spacing-xs);
  }

  .control-btn {
    width: 36px;
    height: 36px;
  }

  .control-btn svg {
    width: 16px;
    height: 16px;
  }

  .track-name {
    font-size: 0.75rem;
    max-width: 120px;
  }

  .volume-slider {
    width: 70px;
  }

  .widget--clock__time {
    font-size: 4rem;
  }

  .widget--clock__date {
    font-size: 0.9rem;
  }

  .bg-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-sm);
  }

  .bg-selector__content {
    padding: var(--spacing-lg);
    max-width: 95vw;
  }
}

@media (max-width: 480px) {
  .widget--clock__time {
    font-size: 3rem;
  }

  .widget--clock__date {
    font-size: 0.8rem;
  }

  .track-name {
    display: none;
  }
}

/* --- Zen Mode --- */
body.zen-mode #widget-area,
body.zen-mode #bg-selector-trigger,
body.zen-mode #music-controls {
  opacity: 0 !important;
  pointer-events: none !important;
  transform: translateX(-50%) translateY(-20px) !important;
}

body.zen-mode #zen-indicator {
  opacity: 1 !important;
  pointer-events: auto !important;
  cursor: pointer;
}

body.zen-mode #zen-indicator:hover {
  background: var(--accent-hover);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}