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

:root {
    --bg: #0a0a12;
    --bg2: #12121e;
    --bg3: #1a1a2a;
    --accent: #00c8ff;
    --accent2: #00ff50;
    --text: #c8c8d8;
    --text-dim: #6060a0;
    --border: #2a2a4a;
    --danger: #ff4040;
    --warning: #ffaa00;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Courier New', monospace;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
}
a:hover { color: var(--accent2); }

/* ---- HEADER ---- */
header {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
    flex-shrink: 0;
}

.logo {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-shadow: 0 0 12px rgba(0,200,255,0.5);
}
.logo span { color: var(--accent2); }

nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--text);
}
nav a:hover { color: var(--accent); }

.btn {
    display: inline-block;
    padding: 0.45rem 1.2rem;
    border: 1px solid var(--accent);
    border-radius: 2px;
    color: var(--accent);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    background: transparent;
    letter-spacing: 0.05em;
    transition: background 0.15s, color 0.15s;
}
.btn:hover, .btn.primary {
    background: var(--accent);
    color: var(--bg);
}
.btn.primary:hover {
    background: var(--accent2);
    border-color: var(--accent2);
}
.btn.danger {
    border-color: var(--danger);
    color: var(--danger);
}
.btn.danger:hover {
    background: var(--danger);
    color: #fff;
}

/* ---- HERO ---- */
.hero {
    text-align: center;
    padding: 4rem 2rem 2rem;
}
.hero h1 {
    font-size: 3rem;
    color: var(--accent);
    text-shadow: 0 0 24px rgba(0,200,255,0.4);
    margin-bottom: 0.5rem;
    letter-spacing: 0.12em;
}
.hero h1 span { color: var(--accent2); }
.hero .tagline {
    color: var(--text-dim);
    font-size: 1rem;
    margin-bottom: 2rem;
}
.hero .actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.hero .actions .btn {
    font-size: 1rem;
    padding: 0.7rem 2rem;
}

/* ---- ASCII ART ---- */
.ascii-demo {
    font-family: 'Courier New', 'Lucida Console', 'DejaVu Sans Mono', monospace;
    font-size: 0.75rem;
    line-height: 1;
    letter-spacing: 0;
    color: var(--accent2);
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1rem 1.5rem;
    display: inline-block;
    margin: 2rem auto;
    white-space: pre;
    text-shadow: 0 0 6px rgba(0,255,80,0.3);
}

/* ---- MAIN LAYOUT ---- */
main {
    flex: 1;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    padding: 2rem;
}

/* ---- INFO GRID ---- */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.5rem;
}
.card h3 {
    color: var(--accent);
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}
.card p, .card li {
    font-size: 0.85rem;
    color: var(--text);
    line-height: 1.6;
}
.card ul {
    padding-left: 1rem;
}
.card .key {
    display: inline-block;
    background: var(--bg3);
    border: 1px solid var(--border);
    padding: 0.1rem 0.4rem;
    border-radius: 2px;
    color: var(--accent2);
    font-size: 0.8rem;
}

/* ---- AUTH FORM ---- */
.auth-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}
.auth-box {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2rem 2.5rem;
    width: 100%;
    max-width: 400px;
}
.auth-box h2 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    letter-spacing: 0.08em;
    text-align: center;
}
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
    letter-spacing: 0.06em;
}
.form-group input {
    width: 100%;
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    padding: 0.5rem 0.8rem;
    border-radius: 2px;
    outline: none;
    transition: border-color 0.15s;
}
.form-group input:focus {
    border-color: var(--accent);
}
.form-actions {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.form-actions .btn {
    width: 100%;
    text-align: center;
    padding: 0.6rem;
}
.form-link {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 1rem;
}

/* ---- LEADERBOARD ---- */
.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.leaderboard-table th {
    background: var(--bg3);
    color: var(--accent);
    padding: 0.6rem 1rem;
    text-align: left;
    font-weight: normal;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--border);
}
.leaderboard-table td {
    padding: 0.55rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}
.leaderboard-table tr:nth-child(even) td {
    background: var(--bg2);
}
.leaderboard-table tr:first-child td { color: var(--warning); font-weight: bold; }
.leaderboard-table tr:nth-child(2) td { color: var(--text); }
.leaderboard-table tr:nth-child(3) td { color: var(--accent2); }

.rank-1::before { content: "🥇 "; }
.rank-2::before { content: "🥈 "; }
.rank-3::before { content: "🥉 "; }

/* ---- SECTION TITLE ---- */
.section-title {
    color: var(--accent);
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.4rem;
}

/* ---- GAME PAGE ---- */
.game-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    gap: 0.5rem;
}

#terminal-container {
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
    box-shadow: 0 0 24px rgba(0,200,255,0.1);
    background: #000c08;
}

.game-info {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: center;
}

/* ---- ERROR MSG ---- */
.msg-error {
    background: rgba(255,64,64,0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.6rem 1rem;
    border-radius: 2px;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    display: none;
}
.msg-error.show { display: block; }

/* ---- FOOTER ---- */
footer {
    text-align: center;
    padding: 1rem;
    color: var(--text-dim);
    font-size: 0.75rem;
    border-top: 1px solid var(--border);
    background: var(--bg2);
    flex-shrink: 0;
}