/* ============================================
   CardGames.ai — Shared Dark Theme Foundation
   ============================================ */

/* CSS Custom Properties */
:root {
  --bg-body: #0f1117;
  --bg-card: #1a1d28;
  --bg-card-hover: #242838;
  --bg-surface: #151822;
  --bg-footer: #0a0c12;
  --bg-input: #1e2130;
  --accent: #4da6ff;
  --accent-hover: #3a8de0;
  --accent-glow: rgba(77, 166, 255, 0.15);
  --text-primary: #e2e4ea;
  --text-secondary: #8b8fa3;
  --text-heading: #ffffff;
  --text-link: #4da6ff;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(77, 166, 255, 0.3);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.5);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --max-content: 960px;
  --transition: 0.2s ease;
}

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

/* Body */
body {
  font-family: 'Oswald', sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  text-align: center;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

/* ======= HEADER ======= */
header {
  padding: 16px 20px 8px;
  background: transparent;
}

.logo-container {
  text-align: center;
}

.logo {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: 0.5px;
}

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 8px;
}

.desktop-nav a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 0;
  transition: color var(--transition);
}

.desktop-nav a:hover {
  color: var(--text-heading);
}

/* ======= HAMBURGER MENU ======= */
.hamburger-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
}

.hamburger-icon {
  font-size: 28px;
  cursor: pointer;
  position: fixed;
  top: 12px;
  left: 14px;
  color: var(--text-heading);
  z-index: 1001;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.hamburger-links {
  display: none;
  flex-direction: column;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 0 0 var(--radius-md) 0;
  padding: 60px 0 12px;
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  max-height: 100vh;
  overflow-y: auto;
  z-index: 1000;
  box-shadow: var(--shadow-card);
}

.hamburger-links.active {
  display: flex;
}

.hamburger-links a {
  color: var(--text-primary);
  padding: 10px 20px;
  text-decoration: none;
  font-size: 15px;
  transition: background-color var(--transition);
  text-align: left;
}

.hamburger-links a:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-heading);
}

.hamburger-links .nav-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 6px 16px;
}

/* ======= GAME AREA ======= */
.game-area {
  position: relative;
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 28px 32px 32px;
  box-shadow: var(--shadow-card);
  max-width: var(--max-content);
  width: 95%;
  margin: 16px auto;
}

.game-area h1 {
  color: var(--text-heading);
  font-size: 28px;
  margin-bottom: 16px;
}

/* ======= BOB MASCOT ======= */
.game-header {
  margin-bottom: 16px;
}

.bob-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.bob-image {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
}

.speech-bubble,
.tooltip-bob,
.tooltip {
  position: relative;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  max-width: 220px;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 15px;
}

.speech-bubble::before,
.tooltip-bob::before,
.tooltip::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 50%;
  transform: translateY(-50%);
  border-width: 8px 10px 8px 0;
  border-style: solid;
  border-color: transparent var(--border-subtle) transparent transparent;
}

.speech-bubble::after,
.tooltip-bob::after,
.tooltip::after {
  content: "";
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  border-width: 7px 9px 7px 0;
  border-style: solid;
  border-color: transparent var(--bg-surface) transparent transparent;
}

.speech-bubble p {
  margin: 0;
  color: var(--text-primary);
}

.hello-image {
  width: 80px;
  height: auto;
  margin-left: 8px;
  opacity: 0;
  transition: opacity 0.5s ease-in;
}

/* ======= GAME CONTROLS ======= */
.game-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn-primary {
  background-color: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 24px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-subtle);
  padding: 10px 24px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Option buttons (settings panels) */
.option-btn {
  flex: 1;
  background-color: var(--bg-input);
  border: 2px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 10px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 14px;
  font-weight: bold;
  font-family: inherit;
}

.option-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.option-btn.active {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button-group {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

/* ======= OVERLAYS ======= */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  border-radius: var(--radius-lg);
}

.settings-content,
.result-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  width: 90%;
  max-width: 360px;
  box-shadow: var(--shadow-card);
}

.settings-content h2,
.result-content h2 {
  color: var(--text-heading);
  margin-bottom: 16px;
}

.setting {
  margin-bottom: 16px;
  text-align: left;
}

.setting label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
  color: var(--text-secondary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#start-game, #play-again {
  background-color: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 24px;
  font-size: 18px;
  font-family: inherit;
  border-radius: 50px;
  cursor: pointer;
  transition: background-color var(--transition);
  margin-top: 16px;
  width: 100%;
  font-weight: bold;
}

#start-game:hover, #play-again:hover {
  background-color: var(--accent-hover);
}

/* ======= HOW TO PLAY ======= */
.how-to-play {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 32px;
  border-radius: var(--radius-lg);
  max-width: var(--max-content);
  width: 95%;
  margin: 16px auto;
  box-shadow: var(--shadow-card);
  text-align: left;
}

.how-to-play h2, .how-to-play h3 {
  margin-bottom: 16px;
  color: var(--text-heading);
  text-align: center;
}

.how-to-play p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.how-to-play a {
  color: var(--accent);
}

/* ======= FOOTER ======= */
footer {
  background: var(--bg-footer);
  color: var(--text-secondary);
  padding: 40px 20px 0;
  width: 100%;
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
}

.footer-content-container {
  max-width: var(--max-content);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: left;
}

.footer-column {
  display: flex;
  flex-direction: column;
}

.footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
}

.footer-column h4 {
  margin-bottom: 12px;
  color: var(--text-heading);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-column a {
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 6px;
  font-size: 14px;
  transition: color var(--transition);
}

.footer-column a:hover {
  color: var(--text-heading);
}

.copyright {
  text-align: center;
  padding: 20px 0;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

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

/* ======= RESPONSIVE ======= */
@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .hamburger-menu {
    display: block;
  }

  header {
    padding-top: 56px;
  }

  .game-area {
    width: 97%;
    padding: 20px 16px 24px;
    border-radius: var(--radius-md);
  }

  .how-to-play {
    width: 97%;
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .bob-image {
    width: 60px;
    height: 60px;
  }

  .speech-bubble, .tooltip-bob, .tooltip {
    font-size: 14px;
    padding: 10px 14px;
  }
}

@media (max-width: 480px) {
  .game-area {
    width: 100%;
    padding: 16px 10px 20px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .how-to-play {
    width: 100%;
    padding: 20px 16px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-column {
    align-items: center;
  }

  .settings-content, .result-content {
    padding: 20px 16px;
  }

  .bob-container {
    flex-direction: column;
    gap: 8px;
  }

  .speech-bubble::before, .tooltip-bob::before, .tooltip::before,
  .speech-bubble::after, .tooltip-bob::after, .tooltip::after {
    display: none;
  }
}