/* Eternal Empires — Core Styles */
:root {
  /* Brand Colors */
  --midnight-slate: #0F172A;
  --imperial-gold: #D4A017;
  --stone-white: #E5E7EB;
  --royal-violet: #7C3AED;
  --iron-gray: #334155;

  /* Affinity Accent Colors */
  --politics: #8B6914;
  --engineering: #607D8B;
  --religion: #4CAF82;
  --economics: #2196B0;
  --honor: #C62828;
  --mythology: #7B1FA2;
  --navigation: #00838F;

  /* Culture Colors */
  --rome-primary: #8B6914;
  --rome-secondary: #E5E7EB;
  --egypt-primary: #D4A017;
  --egypt-secondary: #4CAF82;
  --japan-primary: #C62828;
  --japan-secondary: #1A1A1A;
  --polynesia-primary: #00838F;
  --polynesia-secondary: #E65100;

  /* UI */
  --font-display: 'Cinzel', serif;
  --font-body: 'Inter', sans-serif;
  --transition-speed: 0.3s;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--midnight-slate);
  color: var(--stone-white);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

#game-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#ui-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

#ui-overlay > * {
  pointer-events: auto;
}

/* Screen transition overlay */
.screen-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--midnight-slate);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-speed) ease;
}

.screen-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* Button base */
.btn {
  font-family: var(--font-display);
  font-size: 16px;
  padding: 12px 32px;
  border: 2px solid var(--imperial-gold);
  background: transparent;
  color: var(--imperial-gold);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all var(--transition-speed) ease;
}

.btn:hover {
  background: var(--imperial-gold);
  color: var(--midnight-slate);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--imperial-gold);
  color: var(--midnight-slate);
}

.btn-primary:hover {
  background: #E8B520;
  border-color: #E8B520;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--midnight-slate);
}

::-webkit-scrollbar-thumb {
  background: var(--iron-gray);
  border-radius: 3px;
}

/* Tooltip */
.card-tooltip {
  position: absolute;
  background: var(--iron-gray);
  border: 1px solid var(--imperial-gold);
  border-radius: 4px;
  padding: 12px;
  max-width: 280px;
  font-size: 13px;
  line-height: 1.5;
  z-index: 100;
  pointer-events: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

.card-tooltip .card-name {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--imperial-gold);
  margin-bottom: 4px;
}

.card-tooltip .card-type {
  font-size: 11px;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.card-tooltip .card-effect {
  color: var(--stone-white);
  margin-bottom: 6px;
}

.card-tooltip .card-flavor {
  color: #94A3B8;
  font-style: italic;
  font-size: 12px;
}

.card-tooltip .card-cost {
  position: absolute;
  top: 8px;
  right: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--imperial-gold);
}

/* Panels */
.panel {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--iron-gray);
  border-radius: 4px;
}

.panel-header {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--imperial-gold);
  padding: 10px 14px;
  border-bottom: 1px solid var(--iron-gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.panel-close {
  float: right;
  background: none;
  border: none;
  color: var(--stone-white);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

.panel-close:hover {
  color: var(--imperial-gold);
}

/* Match Log */
.match-log {
  position: absolute;
  right: 0;
  top: 50px;
  width: 280px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  font-size: 12px;
}

.log-entry {
  padding: 6px 14px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.3);
}

.log-entry .log-action {
  color: var(--stone-white);
}

.log-entry .log-surcharge {
  color: var(--honor);
  font-size: 11px;
}

.log-entry .log-phase {
  color: var(--imperial-gold);
  font-size: 10px;
  text-transform: uppercase;
}

/* Settings */
.settings-panel {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 420px;
  padding: 24px;
  z-index: 200;
}

.slider-group {
  margin: 16px 0;
}

.slider-group label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--stone-white);
}

.slider-group input[type="range"] {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  background: var(--iron-gray);
  border-radius: 2px;
  outline: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--imperial-gold);
  cursor: pointer;
}

/* Loading screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--midnight-slate);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.loading-title {
  font-family: var(--font-display);
  font-size: 48px;
  color: var(--imperial-gold);
  margin-bottom: 8px;
}

.loading-subtitle {
  font-size: 14px;
  color: var(--iron-gray);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 40px;
}

.loading-bar-container {
  width: 300px;
  height: 4px;
  background: var(--iron-gray);
  border-radius: 2px;
  overflow: hidden;
}

.loading-bar {
  height: 100%;
  background: var(--imperial-gold);
  width: 0%;
  transition: width 0.3s ease;
}