:root {
    --bg: #121212;
    --card: #1e1e1e;
    --gold: #FFD700;
    --green: #81b64c;
    --text: #fff;
}

body {
    margin: 0; padding: 0;
    background: var(--bg); color: var(--text);
    font-family: 'Segoe UI', sans-serif;
    overflow: hidden;
    height: 100vh; width: 100vw;
}

/* Common */
.container { padding: 20px; text-align: center; }
.logo { font-size: 1.5rem; font-weight: 800; padding: 15px; background: rgba(0,0,0,0.5); }
.gold { color: var(--gold); }

/* Buttons */
.btn-main { background: var(--green); color: white; border: none; padding: 12px 25px; border-radius: 8px; font-weight: bold; width: 100%; margin: 5px 0; font-size: 1rem; }
.btn-sec { background: #333; color: white; border: 1px solid #555; padding: 12px 25px; border-radius: 8px; font-weight: bold; width: 100%; margin: 5px 0; }

/* Hero */
.hero { background: var(--card); padding: 30px 20px; border-radius: 12px; margin-bottom: 20px; border: 1px solid #333; }
.hero h1 { margin: 0 0 10px 0; font-size: 1.8rem; }

/* Promo */
.promo-box { margin-top: 20px; }
.promo-row { display: flex; gap: 10px; margin-top: 10px; }
.promo-item { flex: 1; background: #252525; padding: 15px; border-radius: 8px; border: 1px solid var(--gold); color: white; text-decoration: none; display: flex; flex-direction: column; align-items: center; gap: 5px; font-size: 0.9rem; }

/* Setup Modal */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.9); z-index: 999; display: flex; justify-content: center; align-items: center; }
.modal-box { background: var(--card); padding: 20px; width: 85%; border-radius: 10px; border: 1px solid #444; }
.control-group { margin-bottom: 15px; text-align: left; }
.control-group label { display: block; color: #aaa; margin-bottom: 5px; }
select { width: 100%; padding: 10px; background: #333; color: white; border: none; border-radius: 5px; }
.toggle-btn { display: flex; background: #333; border-radius: 5px; }
.toggle-btn button { flex: 1; background: transparent; color: #888; border: none; padding: 10px; }
.toggle-btn button.active { background: #555; color: white; font-weight: bold; border-radius: 5px; }

/* GAME PAGE (The Fix) */
#gamePage { height: 100%; display: flex; flex-direction: column; }
.game-header { padding: 10px; display: flex; justify-content: space-between; background: var(--card); }
.icon-btn { background: none; border: none; color: #aaa; font-size: 1rem; }

.player-info { display: flex; align-items: center; gap: 10px; padding: 5px 15px; background: var(--bg); height: 60px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; display: flex; justify-content: center; align-items: center; font-size: 1.2rem; }
.cpu { background: #444; color: #ccc; }
.user { background: var(--green); color: white; }
.details { flex: 1; text-align: left; line-height: 1.2; }
.details b { font-size: 0.9rem; display: block; }
.details span { font-size: 0.7rem; color: #888; }
.timer { background: #222; padding: 5px 10px; border-radius: 4px; font-family: monospace; font-size: 1.2rem; }

/* THE BOARD CONTAINER */
#boardContainer {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #181818;
    width: 100%;
}
#myBoard {
    width: 95vw;
    height: 95vw; /* Perfectly Square */
    max-width: 65vh;
    max-height: 65vh;
}

.actions { display: flex; gap: 10px; padding: 15px; justify-content: center; }
.actions button { flex: 1; background: #333; color: white; border: none; padding: 12px; border-radius: 5px; font-weight: bold; }

/* Scanner */
.upload-zone { border: 2px dashed var(--green); padding: 40px; border-radius: 10px; color: #aaa; margin-bottom: 20px; }
.scan-box { background: black; padding: 15px; border-radius: 5px; color: var(--green); font-family: monospace; min-height: 60px; margin-bottom: 10px; }

/* Dynamic Theme CSS Classes */
.theme-green .white-1e1d7 { background-color: #EEEED2; color: #769656; }
.theme-green .black-3c85d { background-color: #769656; color: #EEEED2; }

.theme-blue .white-1e1d7 { background-color: #E1E1E1; color: #8CA2AD; }
.theme-blue .black-3c85d { background-color: #8CA2AD; color: #E1E1E1; }

.theme-brown .white-1e1d7 { background-color: #f0d9b5; color: #b58863; }
.theme-brown .black-3c85d { background-color: #b58863; color: #f0d9b5; }

.theme-gray .white-1e1d7 { background-color: #DEE3E6; color: #8CA2AD; }
.theme-gray .black-3c85d { background-color: #8CA2AD; color: #DEE3E6; }

.highlight-move { box-shadow: inset 0 0 3px 3px rgba(255, 255, 0, 0.5); }