:root {
    --bg-base: #050508;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);

    --accent: #8b5cf6;
    --accent-glow: rgba(139, 92, 246, 0.5);
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --gold: #fbbf24;
    --cyber-blue: #06b6d4;

    --text-main: #f8fafc;
    --text-muted: #64748b;
    --text-dim: #94a3b8;

    --key-bg: rgba(255, 255, 255, 0.03);
    --key-border: rgba(255, 255, 255, 0.09);

    --font-main: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; user-select: none; }

html, body {
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    background: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-main);
}

body {
    display: grid;
    grid-template-rows: auto auto 1fr auto;
    gap: 0.35rem;
    padding: 0.4rem 0.8rem;
    max-width: 1100px;
    margin: 0 auto;
}

/* Top Bar & Level System */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.level-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.35rem 0.75rem;
    border-radius: 10px;
}

.level-badge {
    background: linear-gradient(135deg, var(--accent), #6366f1);
    color: #fff;
    font-weight: 800;
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    box-shadow: 0 0 12px var(--accent-glow);
}

.xp-container {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    width: 150px;
}

.xp-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--text-dim);
}

.xp-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 3px;
    overflow: hidden;
}

.xp-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--cyber-blue));
    transition: width 0.3s ease;
}

.controls { display: flex; gap: 0.4rem; }

.btn {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
    padding: 0.25rem 0.55rem;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:hover, .btn.active {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

/* Mode & Multiplier Header */
.sub-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.quest-banner {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.25);
    padding: 0.3rem 0.75rem;
    border-radius: 8px;
    font-size: 0.72rem;
    font-weight: 800;
}

.quest-title { color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; }

.multiplier-badge {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--gold);
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    text-shadow: 0 0 8px rgba(251, 191, 36, 0.4);
}

.stats-summary {
    display: flex;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.3rem 0.75rem;
    border-radius: 8px;
}

.stat-item span { color: var(--text-muted); font-size: 0.6rem; margin-right: 0.25rem; }

/* Main Game Arena */
.arena-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    min-height: 95px;
    transition: border-color 0.2s ease;
}

.arena-container.boss-mode {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.05);
}

.finger-instruction {
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 0.15rem;
}

.event-popover {
    position: absolute;
    top: 6px;
    background: var(--warning);
    color: #000;
    font-weight: 800;
    font-size: 0.65rem;
    padding: 0.15rem 0.55rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: none;
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.5);
    animation: pulse 0.8s infinite alternate;
}

@keyframes pulse {
    0% { opacity: 0.7; transform: scale(0.96); }
    100% { opacity: 1; transform: scale(1.04); }
}

.boss-timer-bar {
    position: absolute;
    bottom: 0; left: 0;
    height: 4px; width: 100%;
    background: var(--error);
    transition: width 0.1s linear;
    display: none;
}

.stream-text {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 95%;
}

.char-box {
    display: inline-block;
    width: 1.7rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.2);
    transition: all 0.05s ease;
}

.char-box.printed {
    color: var(--success);
    font-weight: 800;
    text-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.char-box.current {
    color: #ffffff;
    font-weight: 800;
    background: var(--accent);
    border-radius: 4px;
    box-shadow: 0 0 14px var(--accent-glow);
}

.char-box.hidden-target {
    filter: blur(5px);
    background: rgba(255, 255, 255, 0.1);
}

.shake {
    animation: shake 0.2s ease-in-out;
    border-color: var(--error) !important;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

/* Keyboard Layout */
.stage-wrapper { position: relative; width: 100%; }

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.65rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    position: relative;
}

.keyboard-row { display: flex; justify-content: center; gap: 0.25rem; }

.key {
    background: var(--key-bg);
    border: 1px solid var(--key-border);
    border-radius: 5px;
    height: 38px;
    min-width: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-dim);
    transition: all 0.08s ease;
}

.key.wide { min-width: 52px; }
.key.wider { min-width: 68px; }
.key.space { min-width: 190px; }

.key.target {
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 12px var(--accent-glow);
    background: rgba(139, 92, 246, 0.25);
}

.key.unlocked-stage { border-color: rgba(16, 185, 129, 0.3); }

.key.pressed {
    background: var(--accent);
    color: #fff;
    transform: translateY(2px);
}

#hands-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 10;
}