/* ==========================================================================
   Clock by Ayush Shivam - Master Stylesheet
   Project URL: https://clock.ayushshivam.online
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Default OLED Theme Variables */
  --bg-color: #000000;
  --text-color: #f5f5f7;
  --sub-text-color: rgba(245, 245, 247, 0.65);
  --accent-color: #00f2fe;
  --accent-glow: rgba(0, 242, 254, 0.25);
  --ui-bg: rgba(20, 20, 22, 0.85);
  --ui-border: rgba(255, 255, 255, 0.12);
  --ui-hover: rgba(255, 255, 255, 0.08);

  /* Fonts */
  --font-family-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-family-inter: "Inter", var(--font-family-system);
  --font-family-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  --font-family-digital: "Orbitron", "Courier New", monospace;
  --font-family-serif: "Playfair Display", Georgia, serif;
  --font-family-geometric: "Outfit", var(--font-family-system);

  --active-font: var(--font-family-system);
  --font-weight: 400;

  /* Sizing & Scaling */
  --clock-scale: 1;
  --shift-x: 0px;
  --shift-y: 0px;

  /* Brightness Dimming Overlay Opacity */
  --dim-opacity: 0;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Theme Definitions
   -------------------------------------------------------------------------- */
body.theme-oled {
  --bg-color: #000000;
  --text-color: #ffffff;
  --sub-text-color: rgba(255, 255, 255, 0.65);
  --accent-color: #00f2fe;
  --ui-bg: rgba(18, 18, 18, 0.9);
  --ui-border: rgba(255, 255, 255, 0.15);
}

body.theme-midnight {
  --bg-color: #090d16;
  --text-color: #e2e8f0;
  --sub-text-color: #94a3b8;
  --accent-color: #38bdf8;
  --ui-bg: rgba(15, 23, 42, 0.9);
  --ui-border: rgba(56, 189, 248, 0.2);
}

body.theme-warm {
  --bg-color: #140f0d;
  --text-color: #f4ead5;
  --sub-text-color: rgba(244, 234, 213, 0.65);
  --accent-color: #fbbf24;
  --ui-bg: rgba(28, 20, 16, 0.9);
  --ui-border: rgba(251, 191, 36, 0.2);
}

body.theme-cyber {
  --bg-color: #0a0e14;
  --text-color: #00f2fe;
  --sub-text-color: rgba(0, 242, 254, 0.7);
  --accent-color: #00ff9d;
  --ui-bg: rgba(10, 20, 30, 0.92);
  --ui-border: rgba(0, 242, 254, 0.3);
}

body.theme-ocean {
  --bg-color: #0a192f;
  background: linear-gradient(135deg, #0a192f 0%, #020c1b 100%);
  --text-color: #e6f1ff;
  --sub-text-color: #8892b0;
  --accent-color: #64ffda;
  --ui-bg: rgba(10, 25, 47, 0.9);
  --ui-border: rgba(100, 255, 218, 0.2);
}

body.theme-sunset {
  --bg-color: #16001e;
  background: linear-gradient(135deg, #16001e 0%, #280b10 100%);
  --text-color: #ffb88c;
  --sub-text-color: rgba(255, 184, 140, 0.65);
  --accent-color: #ff758c;
  --ui-bg: rgba(30, 5, 35, 0.9);
  --ui-border: rgba(255, 117, 140, 0.25);
}

body.theme-paper {
  --bg-color: #f8f9fa;
  --text-color: #1a1a1a;
  --sub-text-color: rgba(26, 26, 26, 0.65);
  --accent-color: #2563eb;
  --ui-bg: rgba(255, 255, 255, 0.95);
  --ui-border: rgba(0, 0, 0, 0.12);
  --ui-hover: rgba(0, 0, 0, 0.05);
}

body.theme-custom {
  background: var(--bg-color);
  color: var(--text-color);
}

/* --------------------------------------------------------------------------
   3. Global Reset & Base Setup
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--active-font);
  font-weight: var(--font-weight);
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Tabular numbers for clean non-jittering clock updates */
.clock-time, .clock-ampm, .clock-date, .clock-day, .clock-timezone {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* --------------------------------------------------------------------------
   4. App Container & Layout
   -------------------------------------------------------------------------- */
.app-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 3rem);
}

/* Brightness Dimming Overlay */
.brightness-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #000000;
  opacity: var(--dim-opacity);
  pointer-events: none;
  z-index: 5;
  transition: opacity var(--transition-fast);
}

/* Clock Container (With Micro-Shifting for OLED Screensaver) */
.clock-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transform: translate(var(--shift-x), var(--shift-y)) scale(var(--clock-scale));
  transition: transform 1.5s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 2;
  width: 100%;
  max-width: 1200px;
}

/* --------------------------------------------------------------------------
   5. Time Display Typography
   -------------------------------------------------------------------------- */
.clock-time-container {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: clamp(0.5rem, 2vw, 1.5rem);
  line-height: 1;
}

.clock-time {
  /* Fluid responsive clock size calculated using viewport dimensions */
  font-size: clamp(3.2rem, 16vw, 13rem);
  font-weight: var(--font-weight);
  letter-spacing: -0.02em;
  color: var(--text-color);
  text-shadow: 0 0 40px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
}

.clock-ampm {
  font-size: clamp(1.2rem, 4vw, 3.5rem);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sub-text-color);
  margin-left: 0.2em;
}

/* Date, Day & Timezone Information Block */
.clock-info {
  margin-top: clamp(1rem, 3vh, 2.5rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.clock-day {
  font-size: clamp(1.1rem, 3.2vw, 2.2rem);
  font-weight: 500;
  color: var(--sub-text-color);
  letter-spacing: 0.02em;
}

.clock-date {
  font-size: clamp(1rem, 2.8vw, 1.9rem);
  font-weight: 400;
  color: var(--text-color);
  opacity: 0.9;
  letter-spacing: 0.01em;
}

.clock-timezone {
  font-size: clamp(0.85rem, 2vw, 1.25rem);
  font-weight: 400;
  color: var(--sub-text-color);
  opacity: 0.75;
  margin-top: 0.3rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Subtle Branding */
.clock-branding {
  position: absolute;
  top: clamp(1.5rem, 4vh, 3rem);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  opacity: 0.4;
  transition: opacity var(--transition-smooth);
}

.brand-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.8;
}

/* Minimal Mode Styles */
body.minimal-mode .clock-info,
body.minimal-mode .clock-branding {
  display: none !important;
}

/* --------------------------------------------------------------------------
   6. UI Controls & Auto-Hiding Overlay
   -------------------------------------------------------------------------- */
.ui-controls {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1rem, 3vw, 2rem);
  pointer-events: none;
  z-index: 10;
  opacity: 1;
  transition: opacity 0.4s ease;
}

.ui-controls.idle {
  opacity: 0;
}

.ui-controls button,
.ui-controls .badge-indicator {
  pointer-events: auto;
}

.top-bar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
}

.badge-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background: var(--ui-bg);
  border: 1px solid var(--ui-border);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--accent-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.bottom-bar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
}

/* Control Buttons */
.control-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 48px;
  min-width: 48px;
  padding: 0 0.9rem;
  background: var(--ui-bg);
  border: 1px solid var(--ui-border);
  color: var(--text-color);
  border-radius: 24px;
  cursor: pointer;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background-color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.control-btn:active {
  transform: translateY(0);
}

.control-btn.primary {
  background: var(--accent-color);
  color: #000000;
  border-color: transparent;
  font-weight: 600;
}

.control-btn.primary:hover {
  filter: brightness(1.15);
}

.control-btn .btn-text {
  font-size: 0.85rem;
  font-weight: 500;
}

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

/* --------------------------------------------------------------------------
   7. Settings Modal & Bottom Sheet / Drawer
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 90;
  opacity: 1;
  transition: opacity var(--transition-smooth);
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 480px;
  height: 100vh;
  height: 100dvh;
  background: var(--ui-bg);
  border-left: 1px solid var(--ui-border);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  z-index: 100;
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
  transform: translateX(0);
  transition: transform var(--transition-smooth);
}

.settings-panel.hidden {
  transform: translateX(100%);
  pointer-events: none;
}

/* Drawer Header */
.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--ui-border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent-color);
}

.header-left h2 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-color);
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--sub-text-color);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.icon-btn:hover {
  background: var(--ui-hover);
  color: var(--text-color);
}

/* Settings Content Body */
.settings-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  /* Smooth scrollbar styling */
  scrollbar-width: thin;
  scrollbar-color: var(--ui-border) transparent;
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.group-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-color);
  margin-bottom: 0.2rem;
}

/* Row Controls */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.setting-row.vertical {
  flex-direction: column;
  align-items: stretch;
}

.setting-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.setting-info label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-color);
}

.setting-desc {
  font-size: 0.78rem;
  color: var(--sub-text-color);
  line-height: 1.3;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

/* --------------------------------------------------------------------------
   8. Form Controls: Toggles, Selects, Sliders & Segmented
   -------------------------------------------------------------------------- */

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: 26px;
  transition: var(--transition-fast);
}

.slider::before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: var(--transition-fast);
}

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

input:checked + .slider::before {
  transform: translateX(22px);
  background-color: #000000;
}

/* Segmented Controls */
.segmented-control {
  display: flex;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--ui-border);
  padding: 3px;
  border-radius: 10px;
  gap: 3px;
}

.segment-btn, .weight-btn {
  flex: 1;
  padding: 0.45rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--sub-text-color);
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 7px;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.segment-btn.active, .weight-btn.active {
  background: var(--accent-color);
  color: #000000;
  font-weight: 600;
}

/* Custom Select */
.custom-select {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--ui-border);
  color: var(--text-color);
  padding: 0.5rem 0.8rem;
  border-radius: 10px;
  font-size: 0.88rem;
  outline: none;
  cursor: pointer;
}

.custom-select option {
  background: #121212;
  color: #ffffff;
}

/* Range Sliders */
.slider-container {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
}

.slider-label {
  font-size: 0.75rem;
  color: var(--sub-text-color);
}

.slider-badge {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-color);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

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

/* Theme Grid */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  margin-top: 0.4rem;
}

.theme-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--ui-border);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.theme-card:hover {
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.theme-card.active {
  border-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}

.theme-preview {
  width: 100%;
  height: 28px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.theme-preview.oled { background: #000000; }
.theme-preview.midnight { background: #090d16; }
.theme-preview.warm { background: #140f0d; }
.theme-preview.cyber { background: #0a0e14; border-color: #00f2fe; }
.theme-preview.ocean { background: linear-gradient(135deg, #0a192f, #020c1b); }
.theme-preview.sunset { background: linear-gradient(135deg, #16001e, #280b10); }
.theme-preview.paper { background: #f8f9fa; border-color: #ccc; }
.theme-preview.custom { background: linear-gradient(135deg, #ff007f, #00f2fe); }

.theme-name {
  font-size: 0.72rem;
  color: var(--text-color);
}

/* Custom Theme Color Inputs */
.custom-theme-controls {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.6rem;
  padding: 0.8rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  border: 1px solid var(--ui-border);
}

.color-picker-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
}

.color-picker-row input[type="color"] {
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
}

/* --------------------------------------------------------------------------
   9. Buttons & Utilities
   -------------------------------------------------------------------------- */
.action-buttons-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: filter var(--transition-fast), transform var(--transition-fast);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  border-color: var(--ui-border);
}

.btn.danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
}

.btn:hover {
  filter: brightness(1.15);
}

.btn:active {
  transform: scale(0.98);
}

.status-badge {
  font-size: 0.78rem;
  padding: 0.25rem 0.6rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  color: var(--accent-color);
}

/* Keyboard Shortcuts Legend */
.shortcuts-legend {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--ui-border);
  border-radius: 12px;
}

.legend-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--sub-text-color);
  margin-bottom: 0.75rem;
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--sub-text-color);
}

kbd {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid var(--ui-border);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--text-color);
}

.settings-footer {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid var(--ui-border);
  font-size: 0.8rem;
  color: var(--sub-text-color);
}

.settings-footer a {
  color: var(--accent-color);
  text-decoration: none;
}

/* Toast Container */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  background: var(--ui-bg);
  border: 1px solid var(--accent-color);
  color: var(--text-color);
  padding: 0.75rem 1.25rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  animation: toast-in 0.3s cubic-bezier(0.16, 1, 0.3, 1), toast-out 0.3s cubic-bezier(0.16, 1, 0.3, 1) 2.7s forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-20px); }
}

/* --------------------------------------------------------------------------
   10. Responsive & Landscape Tweaks
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .settings-panel {
    max-width: 100%;
    border-left: none;
  }

  .shortcuts-grid {
    grid-template-columns: 1fr;
  }

  .theme-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Landscape Mode Optimization for Phone Desk Clock Usage */
@media (orientation: landscape) and (max-height: 500px) {
  .clock-time {
    font-size: clamp(4rem, 22vh, 14rem);
  }

  .clock-info {
    margin-top: 0.4rem;
    flex-direction: row;
    gap: 1.5rem;
  }

  .clock-branding {
    display: none;
  }

  .ui-controls {
    padding: 0.8rem 1.2rem;
  }
}

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