/* ========================================
   CSS Custom Properties
   ======================================== */
:root {
  /* Colors */
  --color-bg: #0a0a0f;
  --color-surface: rgba(255, 255, 255, 0.08);
  --color-surface-hover: rgba(255, 255, 255, 0.12);
  --color-surface-active: rgba(255, 255, 255, 0.18);
  --color-text: #f5f5f7;
  --color-text-muted: rgba(255, 255, 255, 0.6);
  --color-text-dim: rgba(255, 255, 255, 0.4);
  --color-accent: #ff6b35;
  --color-accent-glow: rgba(255, 107, 53, 0.4);
  --color-break: #4ecdc4;
  --color-break-glow: rgba(78, 205, 196, 0.4);
  --color-border: rgba(255, 255, 255, 0.1);
  
  /* Typography */
  --font-display: 'JetBrains Mono', monospace;
  --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Shadows */
  --shadow-glow: 0 0 40px var(--color-accent-glow);
  --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

select {
  font-family: inherit;
  cursor: pointer;
}

/* ========================================
   Background Layer
   ======================================== */
.background {
  position: fixed;
  inset: 0;
  z-index: -1;
}

.background-image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-image var(--transition-slow);
  /* Default gradient background */
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.background-video {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.background-video iframe {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
}

.background-video.active {
  opacity: 1;
}

.background-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

/* ========================================
   Glass Panel Effect
   ======================================== */
.glass-panel {
  background: var(--color-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

/* ========================================
   Main Container
   ======================================== */
.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  padding-bottom: calc(var(--space-xl) + 80px);
  gap: var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}

/* ========================================
   Timer Section
   ======================================== */
.timer-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  position: relative;
}

/* Focus Explanation */
.focus-explanation {
  text-align: center;
  max-width: 600px;
  margin-top: var(--space-md);
}

.explanation-title {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.explanation-text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Mode Indicator */
.mode-indicator {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding: var(--space-sm) var(--space-lg);
  background: rgba(255, 107, 53, 0.15);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  margin-bottom: var(--space-xl);
  position: relative;
  z-index: 2;
}

.mode-indicator.break {
  color: var(--color-break);
  background: rgba(78, 205, 196, 0.15);
}

/* Timer Container - holds display and ring */
.timer-container {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Timer Display */
.timer-display {
  font-family: var(--font-display);
  font-size: clamp(5rem, 20vw, 10rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  text-shadow: 0 0 60px var(--color-accent-glow);
  position: relative;
  z-index: 1;
  transition: text-shadow var(--transition-normal);
}

.timer-display.break {
  text-shadow: 0 0 60px var(--color-break-glow);
}

.timer-separator {
  opacity: 1;
  animation: blink 1s ease-in-out infinite;
}

.timer-display.paused .timer-separator {
  animation: none;
  opacity: 0.5;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

/* Progress Ring */
.progress-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  pointer-events: none;
  top: 0;
  left: 0;
}

.progress-ring-bg {
  fill: none;
  stroke: var(--color-surface);
  stroke-width: 4;
}

.progress-ring-fill {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 565.48;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke var(--transition-normal);
  filter: drop-shadow(0 0 8px var(--color-accent-glow));
}

.progress-ring-fill.break {
  stroke: var(--color-break);
  filter: drop-shadow(0 0 8px var(--color-break-glow));
}

/* Duration Buttons */
.duration-buttons {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-xs);
  background: var(--color-surface);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
}

.duration-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.duration-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.duration-btn.active {
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.duration-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Timer Controls */
.timer-controls {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.control-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  transition: all var(--transition-fast);
}

.control-btn .btn-icon {
  font-size: 1.1rem;
}

.control-btn.primary {
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: var(--shadow-glow);
}

.control-btn.primary:hover {
  transform: scale(1.05);
  box-shadow: 0 0 50px var(--color-accent-glow);
}

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

.control-btn.secondary {
  background: var(--color-surface);
  color: var(--color-text-muted);
  backdrop-filter: blur(10px);
}

.control-btn.secondary:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

/* ========================================
   Sounds Section
   ======================================== */
.sounds-section {
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
}

/* ========================================
   Backgrounds Section
   ======================================== */
.backgrounds-section {
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
}

.background-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--space-md);
  width: 100%;
}

.background-btn {
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  border: 3px solid transparent;
  transition: all var(--transition-fast);
  background-size: cover;
  background-position: center;
}

.background-btn:hover {
  transform: scale(1.03);
  border-color: var(--color-surface-hover);
}

.background-btn.active {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.background-btn .bg-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm);
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  font-size: 0.7rem;
  font-weight: 500;
  text-align: center;
  color: white;
}

.background-btn .video-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  opacity: 0.9;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
  transition: all var(--transition-fast);
}

.background-btn:hover .video-indicator {
  transform: translate(-50%, -50%) scale(1.2);
  opacity: 1;
}

/* Animated background button styles */
.background-btn.animated-bg-btn {
  position: relative;
  overflow: hidden;
}

.background-btn.animated-bg-btn::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 40%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 60%
  );
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { transform: translateX(-100%) rotate(0deg); }
  50% { transform: translateX(100%) rotate(0deg); }
}

.background-btn .animated-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.2rem;
  opacity: 0.9;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
  transition: all var(--transition-fast);
  animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
  0%, 100% { opacity: 0.7; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}

.background-btn:hover .animated-indicator {
  animation: sparkle 0.5s ease-in-out infinite;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.sound-buttons {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.sound-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md);
  min-width: 70px;
  border-radius: var(--radius-md);
  background: transparent;
  transition: all var(--transition-fast);
}

.sound-btn:hover {
  background: var(--color-surface-hover);
}

.sound-btn.active {
  background: var(--color-surface-active);
  box-shadow: inset 0 0 0 2px var(--color-accent);
}

.sound-icon {
  font-size: 1.5rem;
}

.sound-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.sound-btn.active .sound-label {
  color: var(--color-accent);
}

/* Volume Control */
.volume-control {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  max-width: 300px;
  padding-top: var(--space-sm);
}

.volume-icon {
  font-size: 1rem;
  opacity: 0.6;
}

.volume-slider {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-surface-hover);
  border-radius: var(--radius-full);
  outline: none;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-text);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

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

.volume-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: none;
  border-radius: 50%;
  background: var(--color-text);
  cursor: pointer;
}

/* ========================================
   Bottom Controls
   ======================================== */
.bottom-controls {
  display: flex;
  gap: var(--space-md);
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
}

.bottom-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.bottom-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}


/* ========================================
   Background Picker Modal
   ======================================== */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 100;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  padding: var(--space-xl);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 500;
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  font-size: 1.5rem;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.background-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-md);
}

.background-option {
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  border: 3px solid transparent;
  transition: all var(--transition-fast);
}

.background-option:hover {
  transform: scale(1.03);
  border-color: var(--color-surface-hover);
}

.background-option.active {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.background-option img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.background-option .bg-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm);
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  font-size: 0.75rem;
  font-weight: 500;
  text-align: center;
}

/* ========================================
   Animations
   ======================================== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.timer-section {
  animation: fadeIn 0.6s ease-out;
}

.sounds-section {
  animation: fadeIn 0.6s ease-out 0.1s both;
}

.bottom-controls {
  animation: fadeIn 0.6s ease-out 0.2s both;
}

/* Running state pulse */
.timer-display.running {
  animation: pulse 2s ease-in-out infinite;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  .container {
    padding: var(--space-lg);
    gap: var(--space-lg);
  }
  
  .timer-container {
    width: 260px;
    height: 260px;
  }
  
  .progress-ring circle {
    r: 75;
  }
  
  .sounds-section,
  .backgrounds-section {
    padding: var(--space-md);
  }

  .sound-btn {
    min-width: 60px;
    padding: var(--space-sm);
  }

  .background-buttons {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
  
  .control-btn {
    padding: var(--space-md) var(--space-lg);
  }

  .focus-explanation {
    max-width: 100%;
    padding: 0 var(--space-sm);
  }

  .explanation-title {
    font-size: 1rem;
  }

  .explanation-text {
    font-size: 0.85rem;
  }

  .bottom-controls {
    flex-direction: column;
    width: calc(100% - var(--space-xl) * 2);
    bottom: var(--space-lg);
  }
  
  .bottom-btn {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .timer-display {
    font-size: 4rem;
  }

  .focus-explanation {
    padding: 0;
  }

  .explanation-title {
    font-size: 0.95rem;
  }

  .explanation-text {
    font-size: 0.8rem;
  }
  
  .timer-container {
    width: 200px;
    height: 200px;
  }
  
  .duration-btn {
    width: 40px;
    height: 40px;
    font-size: 0.75rem;
  }
  
  .background-buttons {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles */
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ========================================
   Weather Section
   ======================================== */
.weather-section {
  width: 100%;
  padding: var(--space-2xl) var(--space-xl);
  display: flex;
  justify-content: center;
}

.weather-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-2xl);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  max-width: 600px;
  width: 100%;
}

/* Current Weather */
.weather-current {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  min-height: 80px;
}

.weather-loading {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
}

.weather-loading-icon {
  font-size: 1.5rem;
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.weather-loading-text {
  font-size: 0.9rem;
}

.weather-location {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.weather-location-icon {
  font-size: 0.9rem;
}

.weather-location-name {
  font-weight: 500;
}

.weather-main {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.weather-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.weather-temp {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1;
}

.weather-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* Weather Error */
.weather-error {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-dim);
}

.weather-error-icon {
  font-size: 1.2rem;
}

.weather-error-text {
  font-size: 0.85rem;
}

/* Forecast */
.weather-forecast {
  display: flex;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  width: 100%;
  justify-content: center;
}

.forecast-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  min-width: 60px;
}

.forecast-day:hover {
  background: rgba(255, 255, 255, 0.05);
}

.forecast-day:first-child {
  background: rgba(255, 107, 53, 0.1);
}

.forecast-day:first-child .forecast-name {
  color: var(--color-accent);
}

.forecast-name {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.forecast-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.forecast-temp {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
}

/* Weather Responsive */
@media (max-width: 600px) {
  .weather-section {
    padding: var(--space-xl) var(--space-lg);
  }

  .weather-container {
    padding: var(--space-lg);
  }

  .weather-main {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
  }

  .weather-icon {
    font-size: 2rem;
  }

  .weather-temp {
    font-size: 2rem;
  }

  .weather-desc {
    width: 100%;
    text-align: center;
  }

  .weather-forecast {
    gap: var(--space-xs);
    flex-wrap: wrap;
  }

  .forecast-day {
    padding: var(--space-xs) var(--space-sm);
    min-width: 55px;
  }

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

  .forecast-temp {
    font-size: 0.85rem;
  }
}

/* ========================================
   Features Section
   ======================================== */
.features-section {
  width: 100%;
  padding: var(--space-3xl) var(--space-xl);
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.4) 100%);
  position: relative;
}

.features-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 600px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
}

.features-title {
  font-family: var(--font-body);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  text-align: center;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.features-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  text-align: center;
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto var(--space-3xl);
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  background: var(--icon-bg, rgba(255, 107, 53, 0.15));
  color: var(--icon-color, var(--color-accent));
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
  box-shadow: 0 0 20px var(--icon-bg, rgba(255, 107, 53, 0.3));
}

.feature-title {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.feature-description {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Features Section Animation */
.feature-card {
  opacity: 0;
  transform: translateY(20px);
  animation: featureCardFadeIn 0.6s ease-out forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

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

/* Features Section Responsive */
@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .features-section {
    padding: var(--space-2xl) var(--space-lg);
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .feature-card {
    padding: var(--space-lg);
  }

  .features-subtitle {
    margin-bottom: var(--space-2xl);
  }
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  width: 100%;
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  border-top: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.3);
}

.footer-text {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.footer-heart {
  color: #ef4444;
  display: inline-block;
  animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

.footer-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.footer-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text);
}

.footer-link:hover::after {
  width: 100%;
}

.footer-location {
  color: var(--color-text-dim);
  margin-left: 0.25rem;
}

.footer-location::before {
  content: '·';
  margin-right: 0.5rem;
}

@media (max-width: 480px) {
  .site-footer {
    padding: var(--space-lg) var(--space-md);
  }

  .footer-text {
    font-size: 0.8rem;
  }

  .footer-location {
    display: block;
    margin-left: 0;
    margin-top: var(--space-xs);
  }

  .footer-location::before {
    display: none;
  }
}