/* =====================================================
   ArtsDominos · main.css
   Global design tokens, reset, hall background,
   shared components used across index + game screens
   ===================================================== */

/* ===== DESIGN TOKENS ===== */
:root {
  /* Cuban Color Palette */
  --mahogany:        #1A0D07;
  --mahogany-mid:    #2C1810;
  --mahogany-light:  #3D2316;
  --wood:            #5C3520;

  /* Gold */
  --gold:            #C9A84C;
  --gold-light:      #E8C96B;
  --gold-dark:       #8B6914;
  --gold-shine:      #F5E090;
  --gold-dim:        #6B5010;

  /* Cuban Flag */
  --cuban-red:       #CF142B;
  --cuban-blue:      #002A8F;
  --cuban-white:     #F5F5F0;
  --cuban-star:      #FFFFFF;

  /* Felt Table */
  --felt:            #1B4D2E;
  --felt-dark:       #143D24;
  --felt-shadow:     #0D2A1A;
  --felt-highlight:  #236438;

  /* Domino Tiles */
  --tile-cream:      #F8F4E8;
  --tile-border:     #D4C9A8;
  --pip:             #1A1008;

  /* Text */
  --text-light:      #F0E6D3;
  --text-gold:       #C9A84C;
  --text-dim:        #A08060;
  --text-muted:      #6B5040;

  /* Difficulty */
  --diff-beginner:   #4CAF50;
  --diff-easy:       #8BC34A;
  --diff-medium:     #FFC107;
  --diff-hard:       #FF5722;
  --diff-expert:     #E040FB;
  --diff-master:     #CF142B;

  /* Layout */
  --gap-xs:  4px;
  --gap-sm:  8px;
  --gap-md:  16px;
  --gap-lg:  24px;
  --gap-xl:  40px;

  /* Radii */
  --r-sm:    6px;
  --r-md:    12px;
  --r-lg:    20px;
  --r-pill:  100px;

  /* Shadows */
  --shadow-gold:    0 0 20px rgba(201,168,76,0.35);
  --shadow-gold-lg: 0 0 40px rgba(201,168,76,0.5);
  --shadow-deep:    0 8px 40px rgba(0,0,0,0.7);
  --shadow-tile:    0 4px 12px rgba(0,0,0,0.5);
  --shadow-inset:   inset 0 2px 8px rgba(0,0,0,0.5);

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-script:  'Dancing Script', cursive;
  --font-body:    'Lato', 'Helvetica Neue', Arial, sans-serif;

  /* Motion */
  --ease-out-cubic: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.15s ease;
  --t-mid:  0.3s ease;
  --t-slow: 0.5s var(--ease-out-cubic);
}

/* ===== RESET ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  height: 100%;
  height: 100dvh;
  overflow: hidden;
}

body {
  height: 100%;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
  font-family: var(--font-body);
  background: var(--mahogany);
  color: var(--text-light);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

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

/* ===== CUBAN GAME HALL BACKGROUND ===== */
.hall-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    /* Warm candlelight glow from above */
    radial-gradient(ellipse 80% 40% at 50% 0%, rgba(200,130,30,0.12) 0%, transparent 70%),
    /* Amber corner warmth */
    radial-gradient(ellipse 50% 60% at 0% 100%, rgba(120,50,10,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 100% 100%, rgba(120,50,10,0.12) 0%, transparent 60%),
    /* Subtle wood grain lines */
    repeating-linear-gradient(
      88deg,
      transparent 0px,
      transparent 60px,
      rgba(200,150,80,0.018) 60px,
      rgba(200,150,80,0.018) 62px
    ),
    repeating-linear-gradient(
      2deg,
      transparent 0px,
      transparent 100px,
      rgba(200,150,80,0.012) 100px,
      rgba(200,150,80,0.012) 102px
    ),
    /* Base mahogany gradient */
    linear-gradient(170deg, #2C1810 0%, #1A0D07 45%, #0F0603 100%);
}

.hall-vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    ellipse 100% 100% at 50% 50%,
    transparent 40%,
    rgba(0,0,0,0.55) 100%
  );
}

/* ===== SCREEN SYSTEM ===== */
.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity var(--t-mid), transform var(--t-mid);
}

.screen.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

/* ===== SCREEN HEADER ===== */
.screen-header {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  width: 100%;
  max-width: 860px;
  padding: var(--gap-lg) var(--gap-lg) var(--gap-md);
  border-bottom: 1px solid rgba(201,168,76,0.25);
  margin-bottom: var(--gap-lg);
}

.screen-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 3vw, 1.7rem);
  color: var(--gold-light);
  font-weight: 700;
}

/* ===== CONTENT CONTAINERS ===== */
.content-container {
  width: 100%;
  max-width: 700px;
  padding: 0 var(--gap-lg) var(--gap-xl);
  display: flex;
  flex-direction: column;
}

/* ===== GOLD RULE ===== */
.gold-rule {
  width: 100%;
  max-width: 280px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: var(--gap-md) auto;
}
.gold-rule.narrow { max-width: 180px; }

/* ===== BUTTONS ===== */
.btn-primary {
  display: block;
  width: 100%;
  max-width: 300px;
  padding: 15px 28px;
  background: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold) 50%, var(--gold-light) 100%);
  color: var(--mahogany);
  border: none;
  border-radius: var(--r-md);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-gold), inset 0 1px 0 rgba(255,255,255,0.25);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  text-align: center;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold-lg), var(--shadow-deep);
  outline: none;
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-gold);
}

.btn-secondary {
  display: block;
  width: 100%;
  max-width: 300px;
  padding: 12px 28px;
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold-dim);
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  transition: all var(--t-fast);
  text-align: center;
}

.btn-secondary:hover,
.btn-secondary:active {
  background: rgba(201,168,76,0.15);
  border-color: var(--gold);
  color: var(--gold-light);
}

.btn-back {
  background: none;
  border: none;
  color: var(--gold);
  font-size: 0.95rem;
  padding: 12px 16px;
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--r-sm);
  transition: background var(--t-fast);
  white-space: nowrap;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.btn-back:hover,
.btn-back:active {
  background: rgba(201,168,76,0.15);
}

.btn-danger {
  padding: 10px 22px;
  background: linear-gradient(135deg, #8B0010, var(--cuban-red));
  color: white;
  border: none;
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  font-weight: 700;
  transition: opacity var(--t-fast), transform var(--t-fast);
  box-shadow: 0 4px 12px rgba(207,20,43,0.4);
}

.btn-danger:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* ===== TOGGLE BUTTON ===== */
.toggle-btn {
  padding: 8px 22px;
  border: 1px solid var(--gold-dim);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: all var(--t-fast);
  min-width: 62px;
}

.toggle-btn.on {
  background: rgba(27,77,46,0.8);
  border-color: var(--gold);
  color: var(--gold-light);
  box-shadow: 0 0 8px rgba(201,168,76,0.2);
}

/* ===== SELECT ===== */
.setting-select {
  background: var(--mahogany-mid);
  color: var(--text-light);
  border: 1px solid var(--gold-dim);
  border-radius: var(--r-sm);
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
}

.setting-select:focus {
  outline: 1px solid var(--gold);
}

/* ===== SETTINGS ===== */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  padding: 0 var(--gap-lg);
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--gap-sm) 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

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

.version-text {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: var(--gap-lg);
}

/* ===== HOW TO PLAY ===== */
.rules-scroll {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  padding: 0 var(--gap-lg) var(--gap-xl);
}

.rule-card {
  background: rgba(201,168,76,0.06);
  border: 1px solid rgba(201,168,76,0.18);
  border-radius: var(--r-md);
  padding: var(--gap-md) var(--gap-lg);
}

.rule-card h3 {
  font-family: var(--font-heading);
  color: var(--gold-light);
  font-size: 1rem;
  margin-bottom: var(--gap-sm);
}

.rule-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.6;
}

.rule-card.cuban-rule {
  border-color: rgba(207,20,43,0.5);
  background: rgba(207,20,43,0.07);
}

.rule-card.cuban-rule h3 {
  color: #FF7B87;
}

/* ===== UTILITIES ===== */
.hidden { display: none !important; }

/* ===== FORMAT BAR ===== */
.format-bar {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  flex-wrap: wrap;
  padding: var(--gap-sm) var(--gap-lg);
  background: rgba(0,0,0,0.3);
  border-bottom: 1px solid rgba(201,168,76,0.15);
  width: 100%;
}

.format-label {
  color: var(--text-dim);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.format-btn {
  padding: 10px 14px;
  min-height: 40px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(201,168,76,0.3);
  background: transparent;
  color: var(--text-dim);
  font-size: 0.8rem;
  transition: all var(--t-fast);
  white-space: nowrap;
}

.format-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.format-btn.active {
  background: rgba(201,168,76,0.15);
  border-color: var(--gold);
  color: var(--gold-light);
  font-weight: 700;
}