@import url("https://fonts.googleapis.com/css2?family=Titan+One&family=Nunito:wght@400;600;700&display=swap");
:root {
  --bg: #0d1f2d;
  --panel: #1a3342;
  --accent: #ff8c42;
  --accent2: #2196f3;
  --text: #ecf0f1;
  --text-dim: #95a5a6;
  --danger: #e74c3c;
  --success: #27ae60;
  --gold: #f39c12;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --font-title: 'Titan One', cursive;
  --font-body: 'Nunito', sans-serif;
  --transition: 0.18s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font-body); min-height: 100vh; font-size: 16px; line-height: 1.5; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent2); }
header { display: flex; justify-content: space-between; align-items: center; padding: 0.9rem 1.8rem; border-bottom: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 100; background: color-mix(in srgb, var(--bg), transparent 12%); }
.logo { font-family: var(--font-title); font-size: 1.15rem; letter-spacing: 1.5px; color: var(--text); white-space: nowrap; }
.logo span { color: var(--accent2); }
nav { display: flex; gap: 1.1rem; align-items: center; flex-wrap: wrap; }
nav a { color: var(--text-dim); font-weight: 600; letter-spacing: 0.5px; font-size: 0.88rem; padding: 0.2rem 0; border-bottom: 2px solid transparent; transition: color var(--transition), border-color var(--transition); }
nav a:hover { color: var(--text); border-bottom-color: var(--accent); }
#lang-switcher { position: relative; }
#lang-btn { background: var(--panel); border: 1px solid rgba(255,255,255,0.12); color: var(--text); padding: 0.3rem 0.65rem; border-radius: var(--radius); cursor: pointer; font-family: var(--font-body); font-size: 0.85rem; transition: border-color var(--transition); }
#lang-btn:hover { border-color: var(--accent); }
#lang-dropdown { display: none; position: absolute; right: 0; top: calc(100% + 6px); background: var(--panel); border-radius: var(--radius); min-width: 148px; z-index: 200; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,0.1); overflow: hidden; }
#lang-dropdown.open { display: block; animation: fadeDown 0.14s ease; }
@keyframes fadeDown { from { opacity:0; transform:translateY(-6px) } to { opacity:1; transform:translateY(0) } }
.lang-option { padding: 0.5rem 0.8rem; cursor: pointer; display: flex; align-items: center; gap: 0.5rem; font-size: 0.88rem; transition: background var(--transition); }
.lang-flag { font-size: 1.1rem; }
.lang-option:hover, .lang-option.active { background: rgba(255,255,255,0.08); color: var(--accent); }
#game-section { max-width: 940px; margin: 0 auto; padding: 1.5rem 1.2rem 2.5rem; }
#hud { display: flex; flex-wrap: wrap; gap: 0.55rem; align-items: center; margin-bottom: 1rem; }
.hud-cell { background: var(--panel); padding: 0.4rem 0.9rem; border-radius: var(--radius); min-width: 74px; border: 1px solid rgba(255,255,255,0.07); transition: border-color var(--transition); }
.hud-cell:hover { border-color: rgba(255,255,255,0.15); }
.hud-label { display: block; font-size: 0.62rem; color: var(--text-dim); letter-spacing: 1.2px; text-transform: uppercase; }
.hud-value { font-family: var(--font-title); font-size: 1.05rem; color: var(--accent); font-weight: 700; }
#action-btn { margin-left: auto; background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent), #000 30%)); border: none; color: #fff; font-family: var(--font-title); font-weight: 700; padding: 0.6rem 1.3rem; border-radius: var(--radius); cursor: pointer; letter-spacing: 1px; font-size: 0.9rem; transition: transform var(--transition), box-shadow var(--transition); box-shadow: 0 2px 12px color-mix(in srgb, var(--accent), transparent 60%); }
#action-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 20px color-mix(in srgb, var(--accent), transparent 40%); }
#action-btn:active { transform: translateY(0); }
#game-stage { position: relative; background: var(--panel); border-radius: 14px; overflow: hidden; min-height: 440px; border: 1px solid rgba(255,255,255,0.09); box-shadow: var(--shadow); }
#canvas-wrap, #game-board { width: 100%; min-height: 440px; }
#game-canvas { display: block; width: 100%; height: 440px; }
#game-board { display: grid; gap: 8px; padding: 16px; place-content: center; min-height: 440px; }
#overlay { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; background: rgba(0,0,0,0.88); z-index: 5; text-align: center; padding: 2rem; }
#overlay.hidden { display: none; }
.overlay-icon { font-size: 3rem; margin-bottom: 0.6rem; }
.overlay-title { font-family: var(--font-title); font-size: 1.8rem; color: var(--accent2); margin-bottom: 0.5rem; text-shadow: 0 0 24px color-mix(in srgb, var(--accent2), transparent 50%); }
.overlay-sub { color: var(--text-dim); max-width: 440px; margin-bottom: 1.4rem; line-height: 1.6; font-size: 0.95rem; }
.overlay-btn { background: linear-gradient(135deg, var(--accent2), color-mix(in srgb, var(--accent2), #000 25%)); border: none; padding: 0.8rem 1.8rem; border-radius: var(--radius); font-family: var(--font-title); font-weight: 700; cursor: pointer; color: #1a1000; font-size: 1rem; transition: transform var(--transition), box-shadow var(--transition); box-shadow: 0 2px 16px color-mix(in srgb, var(--accent2), transparent 55%); }
.overlay-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 24px color-mix(in srgb, var(--accent2), transparent 40%); }
#game-hint { text-align: center; color: var(--text-dim); font-size: 0.83rem; margin-top: 0.8rem; letter-spacing: 0.3px; line-height: 1.5; }
.section-heading { font-family: var(--font-title); text-align: center; margin: 2.8rem 0 1.6rem; color: var(--accent2); letter-spacing: 2px; font-size: 1.3rem; }
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.1rem; max-width: 940px; margin: 0 auto 2.5rem; padding: 0 1.2rem; }
.about-card { background: var(--panel); padding: 1.4rem; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.07); transition: border-color var(--transition), box-shadow var(--transition); }
.about-card:hover { border-color: rgba(255,255,255,0.16); box-shadow: 0 4px 20px rgba(0,0,0,0.25); }
.about-card h3 { color: var(--accent); margin-bottom: 0.7rem; font-size: 1rem; font-family: var(--font-title); }
.about-card p { color: var(--text-dim); line-height: 1.6; font-size: 0.92rem; margin-bottom: 0.5rem; }
.about-card li { color: var(--text-dim); line-height: 1.7; font-size: 0.92rem; }
.about-card ul { padding-left: 1.2rem; }
.policy-container { background: var(--panel); padding: 2rem 2.5rem; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.07); max-width: 1180px; margin: 2rem auto; box-shadow: var(--shadow); }
.policy-container h2 { color: var(--accent2); margin-bottom: 1.4rem; font-size: 1.7rem; font-family: var(--font-title); }
.policy-container h3 { color: var(--accent); margin-top: 1.5rem; margin-bottom: 0.7rem; font-size: 1.05rem; font-family: var(--font-title); }
.policy-container p { color: var(--text-dim); line-height: 1.7; margin-bottom: 1rem; font-size: 0.95rem; }
.controls-grid { display: grid; grid-template-columns: auto 1fr; gap: 0.4rem 0.9rem; align-items: center; }
.key { background: rgba(255,255,255,0.1); padding: 0.22rem 0.55rem; border-radius: 6px; font-size: 0.82rem; font-family: monospace; border: 1px solid rgba(255,255,255,0.15); }
.key-desc { color: var(--text-dim); font-size: 0.87rem; }
footer { text-align: center; padding: 2rem 1rem; color: var(--text-dim); font-size: 0.82rem; border-top: 1px solid rgba(255,255,255,0.07); margin-top: 2rem; }
.card-tile { aspect-ratio: 1; background: rgba(0,0,0,0.3); border-radius: 10px; cursor: pointer; display: flex; align-items: center; justify-content: center; border: 2px solid rgba(255,255,255,0.12); transition: border-color var(--transition), transform var(--transition); }
.card-tile:hover { border-color: rgba(255,255,255,0.28); transform: scale(1.03); }
.card-tile.flipped { border-color: var(--accent); box-shadow: 0 0 12px color-mix(in srgb, var(--accent), transparent 55%); }
@media (max-width: 640px) {
  header { padding: 0.7rem 1rem; gap: 0.5rem; flex-wrap: wrap; }
  nav { gap: 0.7rem; }
  nav a { font-size: 0.78rem; }
  #game-section { padding: 1rem 0.7rem 1.5rem; }
  .about-grid { grid-template-columns: 1fr; padding: 0 0.7rem; }
  .policy-container { padding: 1.2rem 1rem; }
  .overlay-title { font-size: 1.3rem; }
}

body { background:
  linear-gradient(180deg, color-mix(in srgb, var(--accent), transparent 88%) 0%, transparent 34%),
  var(--bg); }
header { align-items: flex-start; }
#hud { justify-content: center; }
#game-stage { border-radius: 8px 8px 22px 22px; }
.about-grid { grid-template-columns: 1.15fr 0.85fr 1fr; }
header { border-bottom: 1px solid var(--accent); box-shadow: 0 0 22px color-mix(in srgb, var(--accent), transparent 82%); }
.logo { text-shadow: 0 0 14px color-mix(in srgb, var(--accent2), transparent 52%); }
#game-stage { border-color: var(--accent); box-shadow: 0 0 44px color-mix(in srgb, var(--accent), transparent 76%), inset 0 0 36px rgba(0,0,0,0.38); }
.hud-value { text-shadow: 0 0 10px currentColor; }
.hud-cell { border-color: color-mix(in srgb, var(--accent), transparent 52%); box-shadow: 0 0 8px color-mix(in srgb, var(--accent), transparent 86%); }
.overlay-title { text-shadow: 0 0 30px color-mix(in srgb, var(--accent2), transparent 44%); }
.overlay-btn, #action-btn { box-shadow: 0 0 18px color-mix(in srgb, var(--accent), transparent 54%); }
.overlay-btn:hover, #action-btn:hover { box-shadow: 0 0 32px color-mix(in srgb, var(--accent), transparent 38%); }
.about-card { border-color: color-mix(in srgb, var(--accent), transparent 68%); box-shadow: 0 0 14px color-mix(in srgb, var(--accent), transparent 88%); }