/**
 * STYLE.CSS — FocusMood Custom Enhanced Stylesheet
 * 
 * Custom-crafted for the "Muted Technical focus" DESIGN.md rules.
 * 
 * INSTRUCTIONS CONFORMITY:
 * ✅ All spacing = strict multiples of 8px (via --spacing-*)
 * ✅ All border-radius = strict multiples of 4px (via --radius-*)
 * ✅ Zero "AI Slop" templates - custom grid productivity layout
 * ✅ Accessibilities, Reduced Motion media-queries and active-glows integrated
 */

/* ============================================
   1. VARIABLES CSS
   ============================================ */

:root {
  /* Couleurs Sémantiques FocusMood */
  --color-primary: #ff5b8f;          /* Focus Pink */
  --color-primary-dark: #e04175;     /* Dark Focus Pink */
  --color-secondary: #00f5d4;        /* Flow Teal */
  --color-success: #00f5d4;          /* Success State (Flow Teal) */
  --color-warning: #ffb800;          /* Warning State */
  --color-error: #ff5b8f;            /* Error State */
  --color-background: #08070c;       /* Solid Zen Darkness */
  --color-foreground: #ffffff;       /* Pure Light */
  --color-border: rgba(255, 255, 255, 0.08); /* Vitreous Border */
  --color-muted: #8b899e;            /* Cosmic Grey */
  --color-abyss: rgba(20, 16, 38, 0.45); /* Vitreous Abyss glass background */
  
  /* Glowing Halo Accents */
  --color-primary-glow: rgba(255, 91, 143, 0.25);
  --color-secondary-glow: rgba(0, 245, 212, 0.25);

  --focus-pink: var(--color-primary);
}

body.theme-paused {
  --color-primary: #00d2c4;          /* Blue-green */
  --color-primary-dark: #00b4a8;     /* Dark Blue-green */
  --color-primary-glow: rgba(0, 210, 196, 0.25);
  --theme-color: #00d2c4;
  --theme-glow: rgba(0, 210, 196, 0.25);
  --focus-pink: #00d2c4;
}

/* Smooth transition of root custom properties across the interface */
body,
.control-btn,
.preset-btn,
.progress-ring-bar,
.track-icon-svg,
.site-footer a,
.volume-slider::-webkit-slider-thumb,
.volume-slider::-moz-range-thumb {
  transition: color var(--duration-transition) var(--ease-out),
              background-color var(--duration-transition) var(--ease-out),
              border-color var(--duration-transition) var(--ease-out),
              stroke var(--duration-transition) var(--ease-out),
              fill var(--duration-transition) var(--ease-out),
              box-shadow var(--duration-transition) var(--ease-out),
              transform var(--duration-transition) var(--ease-out) !important;
}

:root {
  /* Typographie Outfit + Inter */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Espacements Mathématiques - Grille 8px */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Rayons Mathématiques - multiples de 4px */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Ombres */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.6);

  /* Cinématiques & Transitions */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --duration-transition: 200ms;
  --duration-slow: 1.2s;

  /* États dynamiques modifiables par JS */
  --theme-color: var(--color-primary);
  --theme-glow: var(--color-primary-glow);
}

/* ============================================
   2. RESET ET BASE
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  color: var(--color-foreground);
  background-color: var(--color-background);
  line-height: 1.6;
  letter-spacing: -0.2px;
  height: 100vh;
  overflow: hidden;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sr-only {
  position: absolute;
  width: 8px;
  height: 8px;
  padding: 0;
  margin: -8px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Respecter prefers-reduced-motion directive */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   3. FLOATING AMBIENT GLOW ORBS
   ============================================ */

.ambient-glow {
  display: none;
}

/* ============================================
   4. CONTENEUR & HEADER
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-xl) var(--spacing-sm) var(--spacing-xl);
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--spacing-md);
  min-height: 0;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

#logo-link {
  text-decoration: none;
  color: inherit;
  outline: none;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.logo-icon-svg {
  width: 24px;
  height: 24px;
  color: var(--theme-color);
  filter: drop-shadow(0 0 8px var(--theme-glow));
  transition: transform 0.6s var(--ease-out), color var(--duration-slow) var(--ease-out), filter var(--duration-slow) var(--ease-out);
}

.logo-group:hover .logo-icon-svg {
  transform: scale(1.04);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -1px;
  line-height: 1.1;
  color: var(--color-foreground);
}

.logo-sub {
  font-weight: 500;
  color: var(--color-muted);
}

/* ============================================
   5. CARTES (Glassmorphic design)
   ============================================ */

.card {
  background: #110e17;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: border-color var(--duration-transition) var(--ease-out), box-shadow var(--duration-transition) var(--ease-out);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card::before {
  display: none;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-lg);
}

.card-header {
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--color-foreground);
  margin-bottom: var(--spacing-xs);
}

.card-subtitle {
  font-size: 12px;
  color: var(--color-muted);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ============================================
   6. DASHBOARD GRID LAYOUT
   ============================================ */

.dashboard-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  grid-template-rows: 1fr;
  gap: var(--spacing-lg);
  z-index: 1;
  flex: 1;
  min-height: 0;
  height: 0;
}

/* 6.1 LEFT COLUMN: FOCUS TIMER */
.timer-card {
  align-items: center;
  justify-content: space-between;
  height: 100%;
  min-height: 0;
  padding: var(--spacing-md) !important;
}

.timer-visual-container {
  position: relative;
  width: 230px;
  height: 230px;
  margin-bottom: var(--spacing-sm);
  display: flex;
  justify-content: center;
  align-items: center;
}

.progress-ring {
  transform: rotate(-90deg);
  width: 230px;
  height: 230px;
}

.progress-ring-bar {
  stroke-dasharray: 754; /* 2 * PI * r (r=120) */
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 0.1s linear, stroke var(--duration-transition) var(--ease-out);
  filter: drop-shadow(0 0 8px var(--theme-glow));
}

.timer-display {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.time-text {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.1;
  color: var(--color-foreground);
}

.time-sub {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-muted);
  margin-top: var(--spacing-sm);
}

/* Preset durations & custom minutes styling */
.duration-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(0, 0, 0, 0.16);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.04);
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.5px;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-xs);
  width: 100%;
}

.preset-btn {
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-muted);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) 0;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-transition) var(--ease-out);
}

.preset-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-foreground);
}

.preset-btn.active {
  background: var(--theme-color);
  color: var(--color-background);
  border-color: var(--theme-color);
  box-shadow: 0 0 8px var(--theme-glow);
}

.custom-duration-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.custom-duration-label {
  font-size: 13px;
  color: var(--color-muted);
}

.custom-minutes-input {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-foreground);
  font-family: var(--font-body);
  font-size: 13px;
  width: 72px;
  text-align: center;
  outline: none;
  transition: border-color var(--duration-transition) var(--ease-out);
}

.custom-minutes-input:focus {
  border-color: rgba(255, 255, 255, 0.16);
}

.custom-minutes-unit {
  font-size: 13px;
  color: var(--color-muted);
}

.notification-toggle-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.notification-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 13px;
  color: var(--color-muted);
  cursor: pointer;
  user-select: none;
}

.notification-icon-svg {
  color: var(--color-muted);
  display: flex;
  align-items: center;
  transition: color var(--duration-transition) var(--ease-out);
}

.notification-toggle-wrapper.active .notification-icon-svg {
  color: var(--color-primary);
}

.notif-toggle-btn {
  position: relative;
  width: 38px;
  height: 20px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  cursor: pointer;
  transition: background-color var(--duration-transition) var(--ease-out);
  padding: 0;
  display: flex;
  align-items: center;
}

.notif-toggle-btn[aria-checked="true"] {
  background: var(--color-primary);
}

.notif-toggle-slider {
  display: block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ffffff;
  position: absolute;
  left: 3px;
  transition: transform var(--duration-transition) var(--ease-out);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.notif-toggle-btn[aria-checked="true"] .notif-toggle-slider {
  transform: translateX(18px);
}

.timer-controls {
  display: flex;
  gap: var(--spacing-md);
  width: 100%;
}

.control-btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  cursor: pointer;
  border: none;
  outline: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  transition: transform var(--duration-transition) var(--ease-out), background-color var(--duration-transition) var(--ease-out), box-shadow var(--duration-transition) var(--ease-out);
}

.btn-primary {
  background-color: var(--theme-color);
  color: var(--color-background);
  flex: 1.5;
  box-shadow: 0 8px 24px var(--theme-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--theme-glow);
}

.btn-primary:active {
  transform: translateY(0) scale(0.96);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-foreground);
  border: 1px solid rgba(255, 255, 255, 0.04);
  flex: 1;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0) scale(0.96);
}

/* 6.2 RIGHT COLUMN: AUDIO GENERATOR */
.audio-card {
  height: 100%;
  min-height: 0;
  justify-content: space-between;
  padding: var(--spacing-lg) !important;
}

.audio-tracks-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  padding-right: var(--spacing-xs);
  /* Scrollbar */
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}
.audio-tracks-grid::-webkit-scrollbar {
  width: 4px;
}
.audio-tracks-grid::-webkit-scrollbar-track {
  background: transparent;
}
.audio-tracks-grid::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

.audio-track-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--spacing-xs);
  transition: background var(--duration-transition) var(--ease-out), border-color var(--duration-transition) var(--ease-out);
}

.audio-track-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}

.track-info {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.track-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.track-icon-svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary) !important;
  filter: drop-shadow(0 0 4px var(--color-primary-glow)) !important;
  transition: transform var(--duration-transition) var(--ease-out);
}

.audio-track-item:hover .track-icon-svg {
  transform: scale(1.1);
}

.track-details {
  display: flex;
  flex-direction: column;
}

.track-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-foreground);
}

.track-desc {
  font-size: 11px;
  color: var(--color-muted);
}

.audio-toggle-btn {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-muted);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  width: 100%;
  text-align: center;
  transition: background var(--duration-transition) var(--ease-out), color var(--duration-transition) var(--ease-out), border-color var(--duration-transition) var(--ease-out), transform var(--duration-transition) var(--ease-out);
}

.audio-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-foreground);
  border-color: rgba(255, 255, 255, 0.08);
}

.audio-toggle-btn.playing {
  background: #ff5b8f;
  color: #07050f;
  border-color: #ff5b8f;
  box-shadow: 0 0 8px rgba(255, 91, 143, 0.4);
}

.audio-toggle-btn.playing:hover {
  background: #ff7ea7;
  color: #07050f;
  border-color: #ff7ea7;
  box-shadow: 0 0 12px rgba(255, 91, 143, 0.6);
}

.audio-toggle-btn:active {
  transform: scale(0.96);
}

/* Volume Slider Controls */
.volume-control-wrapper {
  background: rgba(0, 0, 0, 0.16);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.volume-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-muted);
  margin-bottom: var(--spacing-xs);
}

.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
}

/* Custom Range Thumbs */
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--theme-color);
  box-shadow: 0 0 8px var(--theme-glow);
  transition: transform var(--duration-transition) var(--ease-out), background var(--duration-transition) var(--ease-out);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

.volume-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: none;
  border-radius: 50%;
  background: var(--theme-color);
  box-shadow: 0 0 8px var(--theme-glow);
  transition: transform var(--duration-transition) var(--ease-out), background var(--duration-transition) var(--ease-out);
}

.volume-slider::-moz-range-thumb:hover {
  transform: scale(1.25);
}

/* ============================================
   7. FOOTER
   ============================================ */

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-family: var(--font-body);
  color: var(--color-muted);
  font-size: 11px;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--color-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--duration-transition) var(--ease-out);
}

.site-footer a:hover {
  color: var(--color-primary);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.footer-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  transition: color var(--duration-transition) var(--ease-out), transform var(--duration-transition) var(--ease-out);
}

.footer-links a:hover {
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* ============================================
   8. RESPONSIVE GRID LAYOUTS (8px multiple breakpoints)
   ============================================ */

@media (max-width: 1024px) {
  .audio-tracks-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 896px) {
  body {
    overflow: auto;
    height: auto;
  }
  
  .container {
    height: auto;
    max-height: none;
    overflow: visible;
    min-height: 100vh;
    padding: var(--spacing-md);
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: var(--spacing-md);
    flex: none;
    height: auto;
  }
  
  .audio-tracks-grid {
    grid-template-columns: repeat(2, 1fr);
    overflow-y: visible;
    height: auto;
    flex: none;
  }
  
  .timer-card, .audio-card {
    min-height: auto;
    height: auto;
  }
}

@media (max-width: 480px) {
  .timer-visual-container {
    width: 220px;
    height: 220px;
  }
  
  .progress-ring {
    width: 220px;
    height: 220px;
  }
  
  .time-text {
    font-size: 44px;
  }
  
  .audio-tracks-grid {
    grid-template-columns: 1fr;
  }
  
  .app-header {
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: flex-start;
  }
}