/* ==========================================================================
   MindRefined Play — Theme with Day/Night Mode
   Auto-detects system preference, manual toggle available
   ========================================================================== */

:root {
  /* Dark mode (default) */
  --bg: #060D11;
  --bg-card: #0F1A20;
  --bg-surface: #0A1318;
  --text-primary: #E8F0F2;
  --text-secondary: #A0B0B8;
  --text-tertiary: #607078;
  --border: rgba(232, 240, 242, 0.08);
  --border-hover: rgba(232, 240, 242, 0.15);
  --blue: #3B82C4;
  --blue-light: #1A2A38;
  --green: #47B881;
  --green-light: #0A2018;
  --purple: #9B7FD4;
  --purple-light: #1A1530;
  --red: #E85A5A;
  --amber: #E8A838;
  --coral: #E07050;
  --font: 'Inter', -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --toggle-bg: #1A2A38;
}

/* Light mode */
[data-theme="light"] {
  --bg: #F5F7FA;
  --bg-card: #FFFFFF;
  --bg-surface: #EDF0F4;
  --text-primary: #1A2030;
  --text-secondary: #5A6570;
  --text-tertiary: #8A9098;
  --border: rgba(26, 32, 48, 0.1);
  --border-hover: rgba(26, 32, 48, 0.18);
  --blue-light: #E8F0FB;
  --green-light: #E4F5EE;
  --purple-light: #EEEDFC;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --toggle-bg: #E0E4E8;
}

/* Auto light mode from system preference */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #F5F7FA;
    --bg-card: #FFFFFF;
    --bg-surface: #EDF0F4;
    --text-primary: #1A2030;
    --text-secondary: #5A6570;
    --text-tertiary: #8A9098;
    --border: rgba(26, 32, 48, 0.1);
    --border-hover: rgba(26, 32, 48, 0.18);
    --blue-light: #E8F0FB;
    --green-light: #E4F5EE;
    --purple-light: #EEEDFC;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --toggle-bg: #E0E4E8;
  }
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}

/* ---- Nav Bar ---- */
.play-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.play-nav-brand {
  font-family: var(--font);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.play-nav-brand span {
  color: var(--green);
}

.play-nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.play-nav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--blue);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.play-nav-link:hover {
  background: var(--blue-light);
  border-color: var(--blue);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  background: var(--toggle-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px;
  transition: background 0.3s;
}

.theme-toggle-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 14px;
  transition: all 0.3s;
}

.theme-toggle-icon.active {
  background: var(--bg-card);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

/* ---- CTA Bar ---- */
.play-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 12px 24px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.play-cta-text {
  font-size: 13px;
  color: var(--text-secondary);
}

.play-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--green));
  padding: 10px 24px;
  border-radius: 8px;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}

.play-cta-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ---- Game Card Grid ---- */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 24px;
  max-width: 960px;
  margin: 0 auto;
  padding-bottom: 80px;
}

.game-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s;
  box-shadow: var(--shadow);
}

.game-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.game-card-emoji {
  font-size: 36px;
  margin-bottom: 12px;
}

.game-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.game-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---- Landing Page ---- */
.play-hero {
  text-align: center;
  padding: 60px 24px 32px;
  max-width: 600px;
  margin: 0 auto;
}

.play-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 300;
  margin-bottom: 12px;
}

.play-hero h1 strong {
  font-weight: 700;
}

.play-hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* ---- Mobile ---- */
@media (max-width: 640px) {
  .play-nav {
    padding: 10px 16px;
  }

  .play-nav-brand {
    font-size: 14px;
  }

  .play-cta-text {
    display: none;
  }

  .games-grid {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .play-hero {
    padding: 40px 16px 24px;
  }

  .play-hero h1 {
    font-size: 1.6rem;
  }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--text-tertiary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--blue); }