:root {
    --primary: #4f46e5;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --text: #1e293b;
    --border: #e2e8f0;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f172a;
        --text: #f1f5f9;
        --border: #334155;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 500px;
    width: 100%;
    background: var(--bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    color: var(--text);
}

h1 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 10px;
    color: var(--primary);
}

.description {
    text-align: center;
    color: #64748b;
    margin-bottom: 30px;
}

.game-info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(103, 126, 234, 0.1);
    border-radius: 12px;
}

.info-item {
    text-align: center;
}

.info-item .label {
    display: block;
    font-size: 0.85rem;
    color: #64748b;
    margin-bottom: 5px;
}

.info-item .value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.message {
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 20px;
    font-weight: 500;
    transition: all 0.3s;
}

.message.info { background: #dbeafe; color: #1e40af; }
.message.success { background: #d1fae5; color: #065f46; animation: bounce 0.5s; }
.message.error { background: #fee2e2; color: #991b1b; animation: shake 0.3s; }
.message.warning { background: #fef3c7; color: #92400e; }
.message.hint-up { background: #fce7f3; color: #9f1239; }
.message.hint-down { background: #cffafe; color: #164e63; }

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

input[type="number"] {
    flex: 1;
    padding: 15px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 1.1rem;
    background: var(--bg);
    color: var(--text);
    transition: all 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

input[type="number"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #4338ca;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    width: 100%;
    background: #6366f1;
    color: white;
    margin-top: 20px;
}

.btn-secondary:hover {
    background: #4f46e5;
    transform: translateY(-2px);
}

.history {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid var(--border);
}

.history h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #64748b;
}

.history-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 40px;
}

.history-list .empty {
    color: #94a3b8;
    font-size: 0.9rem;
    font-style: italic;
}

.history-item {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.2s;
}

.history-item:hover {
    transform: scale(1.1);
}

.history-item.correct {
    background: var(--success);
    color: white;
}

.history-item.low {
    background: #dbeafe;
    color: #1e40af;
}

.history-item.high {
    background: #fce7f3;
    color: #9f1239;
}

@media (max-width: 600px) {
    .container { padding: 20px; }
    h1 { font-size: 1.5rem; }
    .input-group { flex-direction: column; }
}