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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #4e74a3;
    color: #111;
}

.page {
    max-width: 950px;
    margin: auto;
    padding: 20px;
}

.top-area {
    text-align: center;
    margin-bottom: 24px;
}

.top-area h1 {
    font-size: 34px;
    margin-bottom: 6px;
}

.top-area p {
    color: #0f0909;
    font-size: 14px;
}

.main-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 20px;
    align-items: start;
}

.game-card,
.stats-card,
.info-card,
.history-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 14px;
    padding: 20px;
    transition: 0.2s ease;
}

.game-card {
    grid-column: 1;
}

.stats-card {
    grid-column: 2;
}

.history-card {
    grid-column: 1 / 3;
}

.info-card {
    grid-column: 1 / 3;
}

.game-card:hover,
.stats-card:hover,
.info-card:hover,
.history-card:hover {
    transform: translateY(-2px);
}

.game-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

#gameStatus {
    background: #e5e7eb;
    padding: 6px 12px;
    border-radius: 30px;
    font-size: 12px;
}

.reaction-box {
    height: 260px;
    background: #dbe4f0;
    border: 2px solid #c9d4e5;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    cursor: pointer;
    gap: 8px;
    transition: 0.2s ease;
    padding: 20px;
}

.reaction-box h3 {
    font-size: 28px;
}

.reaction-box p {
    font-size: 14px;
    color: #555;
    line-height: 1.5;
}

.button-row {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

button {
    padding: 11px 16px;
    border: none;
    cursor: pointer;
    border-radius: 10px;
    transition: 0.2s ease;
    font-size: 14px;
}

button:hover {
    opacity: 0.9;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#startBtn {
    background: #2563eb;
    color: white;
    flex: 1;
}

#resetBtn {
    background: #e5e7eb;
    flex: 1;
}

.stats-card h2,
.info-card h2,
.history-card h2 {
    margin-bottom: 12px;
}

.stat-box {
    padding: 12px;
    border: 1px solid #eee;
    margin-bottom: 10px;
    background: #f9fafb;
    border-radius: 10px;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: #555;
    margin-bottom: 4px;
}

.stat-box strong {
    font-size: 20px;
}

.history-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

#clearHistoryBtn {
    background: #ef4444;
    color: white;
    padding: 9px 12px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.history-item {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    padding: 12px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item strong {
    color: #2563eb;
}

.empty-history {
    color: #666;
    font-size: 14px;
}

.info-card h2 {
    margin-bottom: 16px;
    font-size: 22px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.info-item {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 14px;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.info-item span {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #a21caf;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.info-item p {
    font-size: 13px;
    color: #475569;
    line-height: 1.4;
}

@media (max-width: 900px) {
    .info-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 700px) {
    .page {
        padding: 14px;
    }

    .top-area h1 {
        font-size: 28px;
    }

    .main-layout {
        grid-template-columns: 1fr;
    }

    .game-card,
    .stats-card,
    .history-card,
    .info-card {
        grid-column: auto;
    }

    .reaction-box {
        height: 220px;
    }

    .reaction-box h3 {
        font-size: 24px;
    }

    .button-row {
        flex-direction: column;
    }

    .history-top {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .game-heading {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 550px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}