/* ============================================
   COSMOS — Sleep & Relaxation Experience
   Design System & Styles
   ============================================ */

:root {
  --bg-deep: #030014;
  --bg-mid: #0a0520;
  --accent-1: #7c3aed;
  --accent-2: #06b6d4;
  --accent-3: #f43f5e;
  --accent-4: #10b981;
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.55);
  --text-dim: rgba(255, 255, 255, 0.25);
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-hover: rgba(255, 255, 255, 0.1);
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'Space Mono', monospace;
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-deep);
  font-family: var(--font-display);
  color: var(--text-primary);
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}

/* ============================================
   Loading Screen
   ============================================ */

#loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 1s ease, visibility 1s ease;
}

#loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  text-align: center;
  position: relative;
}

.loader-ring {
  width: 120px;
  height: 120px;
  margin: 0 auto 2rem;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--accent-1);
  border-right-color: var(--accent-2);
  animation: spin 1.5s linear infinite;
  position: relative;
}

.loader-ring::before {
  content: '';
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-bottom-color: var(--accent-3);
  border-left-color: var(--accent-4);
  animation: spin 2s linear infinite reverse;
}

.loader-ring::after {
  content: '☽';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent-1);
  animation: pulse 2s ease infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 0.4;
    transform: scale(0.8);
  }

  50% {
    opacity: 1;
    transform: scale(1.2);
  }
}

.loader-title {
  font-size: 2rem;
  font-weight: 200;
  letter-spacing: 1.2em;
  text-indent: 1.2em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loader-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.3em;
  animation: blink 1.5s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ============================================
   Canvases
   ============================================ */

canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

#cosmos {
  z-index: 1;
}

#aurora {
  z-index: 2;
  pointer-events: none;
}

#audioViz {
  z-index: 3;
  pointer-events: none;
}

/* ============================================
   UI Overlay
   ============================================ */

#ui-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  opacity: 0;
  transition: opacity 1.5s ease;
}

#ui-overlay.visible {
  opacity: 1;
}

/* Top Bar */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: auto;
  position: relative;
  z-index: 500;
}

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

.logo-icon {
  font-size: 1.5rem;
  color: var(--accent-1);
  animation: twinkle 3s ease infinite;
}

@keyframes twinkle {

  0%,
  100% {
    opacity: 0.6;
    transform: rotate(0deg) scale(1);
  }

  50% {
    opacity: 1;
    transform: rotate(15deg) scale(1.1);
  }
}

.logo-text {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5em;
  color: var(--text-primary);
}

.logo-tagline {
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--accent-2);
  opacity: 0.7;
  text-transform: uppercase;
}

.controls {
  display: flex;
  gap: 0.5rem;
}

.ctrl-btn {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.ctrl-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.ctrl-btn.active {
  border-color: var(--accent-1);
  color: var(--accent-2);
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.15);
}

.ctrl-icon {
  font-size: 1rem;
}

/* Pulsing glow hint for the Sleep button */
.ctrl-btn.pulse-hint {
  animation: pulseGlow 2.5s ease infinite;
  animation-delay: 2s;
}

.ctrl-btn.pulse-hint.active {
  animation: none;
}

@keyframes pulseGlow {

  0%,
  100% {
    box-shadow: 0 0 5px rgba(6, 182, 212, 0.1);
    border-color: var(--glass-border);
  }

  50% {
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.35), 0 0 40px rgba(124, 58, 237, 0.15);
    border-color: rgba(6, 182, 212, 0.4);
  }
}

/* ============================================
   Welcome Text
   ============================================ */

.welcome {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: opacity 2s ease;
  pointer-events: none;
}

.welcome.hidden {
  opacity: 0;
}

.welcome-title {
  font-size: clamp(2rem, 6vw, 5rem);
  font-weight: 200;
  letter-spacing: 0.3em;
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.letter {
  display: inline-block;
  opacity: 0;
  transform: translateY(40px);
  animation: letterIn 0.8s ease forwards;
  animation-delay: calc(var(--delay) * 0.08s + 0.5s);
  background: linear-gradient(180deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.letter-space {
  width: 0.4em;
}

@keyframes letterIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.welcome-sub {
  font-size: clamp(0.8rem, 1.5vw, 1.1rem);
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 0.2em;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeUp 1s ease forwards 2s;
}

.welcome-hint {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  opacity: 0;
  animation: fadeUp 1s ease forwards 2.5s;
}

.hint-icon {
  font-size: 1.2rem;
  animation: bounce 2s ease infinite 3s;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }

  from {
    transform: translateY(10px);
  }
}

@keyframes bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

/* ============================================
   Bottom Stats Bar
   ============================================ */

.bottom-bar {
  display: flex;
  justify-content: center;
  gap: 3rem;
  pointer-events: auto;
  position: relative;
  z-index: 500;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.25em;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-2);
  font-weight: 700;
}

/* ============================================
   Palette Indicator
   ============================================ */

.palette-indicator {
  position: fixed;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.palette-indicator.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.palette-indicator.hidden {
  display: none;
}

.palette-dots {
  display: flex;
  gap: 0.35rem;
}

.palette-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.palette-name {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
}

/* ============================================
   Sleep Timer Panel
   ============================================ */

.timer-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: 300;
  background: rgba(5, 2, 20, 0.85);
  border: 1px solid var(--glass-border);
  border-radius: 1.5rem;
  padding: 2rem;
  min-width: 320px;
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s ease;
}

.timer-panel.show {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.timer-panel.hidden {
  display: none;
}

.timer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.timer-title {
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: var(--text-primary);
}

.timer-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.3s ease;
}

.timer-close:hover {
  color: var(--text-primary);
}

.timer-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.timer-option {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.75rem;
  border-radius: 0.75rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  transition: all 0.3s ease;
}

.timer-option:hover {
  background: var(--glass-hover);
  border-color: var(--accent-2);
  color: var(--accent-2);
  transform: translateY(-2px);
}

.timer-option.selected {
  border-color: var(--accent-2);
  color: var(--accent-2);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

.timer-display {
  margin-top: 1.5rem;
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--glass-border);
}

.timer-display.hidden {
  display: none;
}

.timer-remaining {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 200;
  color: var(--accent-2);
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.timer-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.timer-cancel {
  margin-top: 1rem;
  background: none;
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: var(--accent-3);
  padding: 0.5rem 1.5rem;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  transition: all 0.3s ease;
}

.timer-cancel:hover {
  background: rgba(244, 63, 94, 0.1);
  border-color: var(--accent-3);
}

/* ============================================
   Sound Mixer Panel
   ============================================ */

.mixer-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: 300;
  background: rgba(5, 2, 20, 0.9);
  border: 1px solid var(--glass-border);
  border-radius: 1.5rem;
  padding: 1.5rem 2rem;
  width: 360px;
  max-height: 80vh;
  overflow-y: auto;
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s ease;
}

.mixer-panel.show {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.mixer-panel.hidden {
  display: none;
}

.mixer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.mixer-title {
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: var(--text-primary);
}

.mixer-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.3s ease;
}

.mixer-close:hover {
  color: var(--text-primary);
}

.mixer-group-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-dim);
  letter-spacing: 0.3em;
  display: block;
  margin-bottom: 0.75rem;
}

.mixer-sliders {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

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

.mixer-row-icon {
  font-size: 1rem;
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

.mixer-row-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-secondary);
  width: 5.5rem;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.mixer-row-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.08);
  outline: none;
  cursor: pointer;
}

.mixer-row-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-2);
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: box-shadow 0.2s ease;
}

.mixer-row-slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.4);
}

.mixer-row-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-2);
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
}

.mixer-row-value {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  width: 2rem;
  text-align: right;
  flex-shrink: 0;
}

/* ============================================
   Breathing Guide
   ============================================ */

.breathing-guide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  z-index: 250;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.breathing-guide.show {
  opacity: 1;
}

.breathing-guide.hidden {
  display: none;
}

.breath-circle-outer {
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.breath-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 2px solid rgba(6, 182, 212, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  transition: width 0.5s ease, height 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.05);
}

.breath-circle.inhale {
  width: 200px;
  height: 200px;
  border-color: rgba(6, 182, 212, 0.6);
  box-shadow: 0 0 60px rgba(6, 182, 212, 0.15), 0 0 120px rgba(124, 58, 237, 0.08);
}

.breath-circle.hold {
  width: 200px;
  height: 200px;
  border-color: rgba(124, 58, 237, 0.5);
  box-shadow: 0 0 50px rgba(124, 58, 237, 0.15);
}

.breath-circle.exhale {
  width: 100px;
  height: 100px;
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 0 40px rgba(16, 185, 129, 0.1);
}

.breath-text {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.breath-count {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 200;
  color: var(--accent-2);
}

.breath-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 2.5rem;
}

.breath-pattern-btn {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  transition: all 0.3s ease;
}

.breath-pattern-btn.active {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.breath-pattern-btn:hover {
  background: var(--glass-hover);
}

.breath-close-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-dim);
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  transition: all 0.3s ease;
}

.breath-close-btn:hover {
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ============================================
   Dim Mode Overlay
   ============================================ */

.dim-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: black;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1s ease;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  #ui-overlay {
    padding: 1rem;
  }

  /* Stack header: logo on left, controls wrap below */
  .top-bar {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .controls {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .ctrl-label {
    display: none;
  }

  .ctrl-btn {
    padding: 0.6rem 0.8rem;
    min-width: 44px;
    justify-content: center;
  }

  .ctrl-icon {
    font-size: 1.1rem;
  }

  /* Bottom stats wrap */
  .bottom-bar {
    flex-wrap: wrap;
    gap: 1rem 2rem;
    justify-content: center;
  }

  .welcome-title {
    letter-spacing: 0.15em;
    font-size: clamp(1.5rem, 5vw, 3rem);
  }

  .welcome-sub {
    font-size: 0.8rem;
    padding: 0 1rem;
  }

  .welcome-hint {
    font-size: 0.6rem;
    padding: 0 1rem;
    text-align: center;
  }

  /* Timer panel */
  .timer-panel {
    min-width: unset;
    width: calc(100% - 2rem);
    max-width: 360px;
    padding: 1.5rem;
  }

  .timer-remaining {
    font-size: 2rem;
  }

  /* Logo tagline */
  .logo-tagline {
    display: none;
  }
}

@media (max-width: 480px) {
  #ui-overlay {
    padding: 0.75rem;
  }

  .controls {
    gap: 0.3rem;
  }

  .ctrl-btn {
    padding: 0.5rem 0.65rem;
  }

  .bottom-bar {
    gap: 0.75rem 1.5rem;
  }

  .stat-label {
    font-size: 0.5rem;
  }

  .stat-value {
    font-size: 0.7rem;
  }

  .logo-text {
    font-size: 0.75rem;
    letter-spacing: 0.3em;
  }

  .welcome-title {
    font-size: clamp(1.2rem, 4.5vw, 2.5rem);
    letter-spacing: 0.1em;
  }

  .timer-panel {
    width: calc(100% - 1.5rem);
    padding: 1.25rem;
    border-radius: 1rem;
  }

  .timer-options {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
  }

  .timer-option {
    padding: 0.6rem 0.4rem;
    font-size: 0.65rem;
  }

  .timer-remaining {
    font-size: 1.8rem;
  }
}

/* Touch-friendly: larger tap targets on touch devices */
@media (pointer: coarse) {
  .ctrl-btn {
    min-height: 44px;
    min-width: 44px;
  }

  .timer-option {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .timer-close {
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .timer-cancel {
    min-height: 44px;
    padding: 0.5rem 2rem;
  }
}

/* ============================================
   Scrollbar (hidden)
   ============================================ */
::-webkit-scrollbar {
  display: none;
}