/* Shared Stylesheet for Core Clocks, City Clocks & Specialized Timers (core-tools.css) */
:root {
  --color-bg: #111;
  --color-container: #222;
  --color-tab: #444;
  --color-primary: #ff9800;
  --color-primary-hover: #e68900;
  --color-accent: #4caf50;
  --color-success: #4caf50;
  --color-warning: #ffc107;
  --color-text: #fff;
  --color-text-secondary: #bbb;
  --color-social: #007bff;
  --color-shadow: rgba(255, 255, 255, 0.2);
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 15px;
  --spacing-lg: 20px;
  --spacing-xl: 40px;
  --font-size-normal: 1rem;
  --font-size-medium: 1.2rem;
  --font-size-large: 1.5rem;
  --font-size-xlarge: 3rem;
  --border-radius: 5px;
  --border-radius-lg: 15px;
}

html.light-mode {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-container: #f5f5f5;
  --color-tab: #e0e0e0;
  --color-text-secondary: #555;
  --color-shadow: rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Arial', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  text-align: center;
  padding: var(--spacing-lg);
}

header, footer {
  text-align: center;
  padding: 1rem;
}

.container {
  background: var(--color-container);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 0 20px var(--color-shadow);
  width: 90%;
  max-width: 500px;
  margin: 0 auto;
}

.tabs {
  display: flex;
  justify-content: space-around;
  margin-bottom: var(--spacing-lg);
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.tab {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  background: var(--color-tab);
  border: none;
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-size: var(--font-size-medium);
  transition: background-color 0.3s ease;
  flex: 1;
  min-width: 80px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tab:hover,
.tab.active {
  background: var(--color-primary);
}

.content {
  display: none;
}

.content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.clock,
.timer,
.stopwatch,
.alarm {
  font-size: var(--font-size-xlarge);
  margin-top: var(--spacing-lg);
  font-weight: bold;
  font-variant-numeric: tabular-nums;
}

.date {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

.weather-info {
  margin-top: var(--spacing-lg);
}

.weather-main {
  font-size: 2rem;
  margin: var(--spacing-md) 0;
  font-weight: bold;
}

.weather-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  font-size: var(--font-size-medium);
}

.weather-item {
  background: var(--color-tab);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
}

.location-info {
  font-size: var(--font-size-large);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.ip-info {
  font-size: var(--font-size-normal);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

button {
  padding: var(--spacing-sm) var(--spacing-md);
  margin: var(--spacing-sm);
  border: none;
  cursor: pointer;
  border-radius: var(--border-radius);
  background: var(--color-primary);
  color: var(--color-text);
  font-size: var(--font-size-medium);
  transition: background-color 0.3s ease, transform 0.1s ease;
}

button:hover {
  background: var(--color-primary-hover);
}

button:active {
  transform: scale(0.98);
}

input {
  padding: var(--spacing-sm);
  font-size: var(--font-size-medium);
  margin-bottom: var(--spacing-sm);
  text-align: center;
  border: none;
  border-radius: var(--border-radius);
  width: 80%;
  background: var(--color-text);
  color: var(--color-bg);
}

.controls {
  margin-top: var(--spacing-md);
}

.credits {
  margin-top: var(--spacing-lg);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.credits a {
  color: var(--color-primary);
  text-decoration: none;
}

.quote-text {
  font-style: italic;
  margin-bottom: var(--spacing-xs);
}

.quote-author {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

#city-clock-container {
  background: var(--color-container) !important;
  padding: var(--spacing-md) !important;
  color: var(--color-text) !important;
  max-width: 100% !important;
}

#city-select {
  background: var(--color-tab) !important;
  color: var(--color-text) !important;
  padding: var(--spacing-sm) !important;
  border-radius: var(--border-radius) !important;
}

#city-time-display {
  color: var(--color-text) !important;
  margin-top: var(--spacing-md) !important;
}

/* City & Hub Shared Components */
.timezone-badge {
  display: inline-block;
  background: var(--color-tab);
  color: var(--color-primary);
  font-size: var(--font-size-medium);
  font-weight: bold;
  border-radius: var(--border-radius);
  padding: 4px 14px;
  margin: var(--spacing-sm) 0;
  letter-spacing: 1px;
}

.city-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: var(--spacing-md);
}

.city-flag { font-size: 2.2rem; }
.city-name { font-size: 1.8rem; font-weight: bold; color: var(--color-primary); }
.city-subtitle { font-size: var(--font-size-normal); color: var(--color-text-secondary); margin-bottom: var(--spacing-lg); }

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  font-size: var(--font-size-medium);
}

.info-item {
  background: var(--color-tab);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
}

.info-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 3px;
}

.info-value {
  font-weight: bold;
  color: var(--color-text);
}

.fact-box {
  background: var(--color-tab);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
  font-size: var(--font-size-normal);
  color: var(--color-text-secondary);
  line-height: 1.6;
  text-align: left;
}

.fact-box strong { color: var(--color-primary); }

#fullscreen-toggle, #lightModeToggle {
  position: fixed;
  background-color: var(--color-container);
  border: 1px solid var(--color-tab);
  border-radius: 6px;
  padding: 10px;
  cursor: pointer;
  z-index: 9999;
  color: var(--color-text);
  font-size: 1.2rem;
}

#fullscreen-toggle {
  top: 20px;
  right: 20px;
}

#lightModeToggle {
  top: 80px;
  right: 20px;
}

@media (max-width: 600px) {
  .container {
    width: 100%;
    padding: var(--spacing-lg);
  }
  .tabs {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .tab {
    flex: 1 1 calc(50% - var(--spacing-sm));
    margin-bottom: var(--spacing-xs);
  }
  .clock,
  .timer,
  .stopwatch,
  .alarm {
    font-size: calc(var(--font-size-xlarge) * 0.8);
  }
  .weather-main {
    font-size: 1.5rem;
  }
  .info-grid,
  .weather-details {
    grid-template-columns: 1fr;
  }
}