#battle-container {
    width: 100%;
    max-width: 900px;
}

.battle-config {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.battle-config-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.battle-config-group label {
    color: var(--sub);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: lowercase;
    font-family: var(--font);
}

.difficulty-btns,
.duration-btns {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
}

.battle-start-btn {
    background: var(--accent);
    color: var(--bg);
    border: none;
    font-family: var(--font);
    font-size: 16px;
    font-weight: 700;
    padding: 13px 48px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    margin-top: 8px;
    letter-spacing: 0.04em;
    box-shadow:
        0 0 0 0 var(--accent-glow),
        0 4px 20px rgba(0, 0, 0, 0.3);
}

.battle-start-btn:hover {
    filter: brightness(1.12);
    transform: translateY(-2px);
    box-shadow:
        0 0 0 5px var(--accent-glow),
        0 8px 32px rgba(0, 0, 0, 0.35);
}

.battle-start-btn:active {
    filter: brightness(0.95);
    transform: translateY(0);
    box-shadow:
        0 0 0 2px var(--accent-glow),
        0 2px 8px rgba(0, 0, 0, 0.3);
}

.battle-arena {
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.battle-arena.hidden {
    display: none;
}

.battle-timer {
    text-align: center;
    font-size: 40px;
    font-weight: 700;
    color: var(--accent);
    text-shadow: 0 0 36px var(--accent-glow);
    letter-spacing: -1.5px;
    transition: var(--transition-smooth);
}

.battle-progress {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.battle-player {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.player-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.player-name {
    color: var(--text);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.ai-name {
    color: var(--error);
}

.player-wpm {
    color: var(--sub);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.03em;
    transition: var(--transition-smooth);
}

.progress-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 48px;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.45) 100%);
    border-radius: 0 4px 4px 0;
    animation: shimmer 1.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.player-fill {
    background: linear-gradient(90deg, var(--accent) 0%, color-mix(in srgb, var(--accent) 75%, #ffffff) 100%);
    box-shadow: 0 0 14px var(--accent-glow);
}

.ai-fill {
    background: linear-gradient(90deg, var(--error) 0%, color-mix(in srgb, var(--error) 75%, #ffffff) 100%);
    box-shadow: 0 0 14px var(--error-glow);
}

.battle-results {
    text-align: center;
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.battle-results.hidden {
    display: none;
}

.battle-winner {
    font-size: 46px;
    font-weight: 700;
    margin-bottom: 36px;
    letter-spacing: -0.5px;
    animation: slideUp 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.battle-winner.win {
    color: var(--accent);
    text-shadow: 0 0 56px var(--accent-glow);
}

.battle-winner.lose {
    color: var(--error);
    text-shadow: 0 0 56px var(--error-glow);
}

.battle-winner.draw {
    color: var(--sub);
}

.battle-scores {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin-bottom: 36px;
}

.battle-score-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 26px 40px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.22);
    transition: var(--transition-smooth);
    animation: slideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.battle-score-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 36px rgba(0, 0, 0, 0.32);
}

.score-name {
    font-size: 12px;
    color: var(--sub);
    letter-spacing: 0.08em;
    text-transform: lowercase;
}

.score-wpm {
    font-size: 54px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.05;
    letter-spacing: -1.5px;
    text-shadow: 0 0 36px var(--accent-glow);
}

.ai-card .score-wpm {
    color: var(--error);
    text-shadow: 0 0 36px var(--error-glow);
}

.score-label {
    font-size: 11px;
    color: var(--sub);
    letter-spacing: 0.06em;
}

.score-acc {
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
}

.battle-vs {
    font-size: 20px;
    font-weight: 700;
    color: var(--sub);
    opacity: 0.4;
    letter-spacing: 0.04em;
}

.countdown-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.68);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    animation: fadeIn 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 16px;
}

.countdown-number {
    font-size: 128px;
    font-weight: 700;
    color: var(--accent);
    text-shadow:
        0 0 60px var(--accent-glow-strong),
        0 0 120px var(--accent-glow);
    line-height: 1;
    font-family: var(--font);
    letter-spacing: -6px;
    animation: countdown 0.85s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.countdown-label {
    font-size: 14px;
    color: var(--sub);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-family: var(--font);
    opacity: 0.8;
}

.confetti-particle {
    position: fixed;
    pointer-events: none;
    z-index: 200;
    border-radius: 2px;
    animation: confettiFall 1.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    will-change: transform, opacity;
}