/* 기본 스타일 및 리셋 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #6b7280;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --neutral-color: #6b7280;
    
    --light-bg: #f9fafb;
    --dark-bg: #1f2937;
    
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --hover-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --border-radius: 12px;
    --card-radius: 16px;
    --button-radius: 8px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

body {
    font-family: var(--font-sans);
    background-color: var(--light-bg);
    color: #111827;
    line-height: 1.6;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); /* For notched devices */
}

.game-container {
    max-width: 100%;
    width: 500px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

h1 {
    color: var(--dark-bg);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

h3 {
    color: var(--dark-bg);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 600;
}

/* 난이도 선택 버튼 */
.difficulty-selector {
    display: flex;
    justify-content: center;
    margin: var(--spacing-lg) 0;
    gap: var(--spacing-xs);
}

.difficulty-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid transparent;
    background-color: white;
    color: var(--secondary-color);
    cursor: pointer;
    border-radius: var(--button-radius);
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: var(--card-shadow);
    flex: 1;
    text-align: center;
    max-width: 120px;
}

.difficulty-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--hover-shadow);
    background-color: #f9fafb;
}

.difficulty-btn.selected {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

/* 게임 보드 */
.game-board {
    background-color: white;
    border-radius: var(--card-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--spacing-xl);
}

/* 점수 보드 */
.scoreboard {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.score-panel {
    flex: 1;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

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

.computer-panel {
    background-color: var(--danger-color);
    color: white;
}

.score-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.score-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.round-panel {
    width: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-sm);
    background-color: var(--dark-bg);
    color: white;
}

.round-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.round-value {
    font-size: 1.25rem;
    font-weight: 700;
}

/* 결과 디스플레이 */
.result-display {
    text-align: center;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background-color: #f3f4f6;
    border-radius: var(--border-radius);
    font-size: 1.125rem;
    font-weight: 500;
    min-height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

/* VS 표시 */
.versus-display {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: var(--spacing-md) 0;
}

/* 카드 컨테이너 */
.computer-section, .player-section {
    margin: var(--spacing-lg) 0;
}

.cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

/* 카드 스타일 */
.card {
    width: 75px;
    height: 110px;
    border: 3px solid #e5e7eb;
    border-radius: var(--card-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    box-shadow: var(--card-shadow);
}

.card:hover:not(.disabled):not(.computer-card) {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
    border-color: #d1d5db;
}

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

.card.selected {
    border-color: var(--primary-color);
    background-color: #eff6ff;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.computer-card {
    background-color: var(--dark-bg);
    color: white;
    font-size: 2rem;
    font-weight: 700;
    border-color: #111827;
}

.computer-card .card-icon, 
.computer-card .card-name {
    color: white;
}

.card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.card-name {
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 90%;
    text-align: center;
}

.card-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--danger-color);
    color: white;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 액션 버튼 */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.action-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--button-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: var(--card-shadow);
}

.action-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--hover-shadow);
}

.action-btn.secondary {
    background-color: var(--secondary-color);
}

.action-btn.secondary:hover {
    background-color: #4b5563;
}

/* 히스토리 섹션 */
.history-section {
    background-color: white;
    border-radius: var(--card-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--spacing-xl);
}

.history-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--dark-bg);
    font-weight: 600;
}

.history-table {
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.history-header {
    display: grid;
    grid-template-columns: 0.5fr 1.5fr 2fr 1.5fr;
    background-color: var(--dark-bg);
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
}

.history-round-header,
.history-player-header,
.history-result-header,
.history-computer-header {
    padding: var(--spacing-sm);
}

.history-body {
    max-height: 300px;
    overflow-y: auto;
    background-color: #f9fafb;
}

.history-row {
    display: grid;
    grid-template-columns: 0.5fr 1.5fr 2fr 1.5fr;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
    transition: background-color 0.2s ease;
}

.history-row:hover {
    background-color: #f3f4f6;
}

.history-row:last-child {
    border-bottom: none;
}

.history-round,
.history-player,
.history-result,
.history-computer {
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.history-player,
.history-computer {
    flex-direction: column;
}

.history-card-mini {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.history-result {
    font-weight: 600;
    font-size: 0.875rem;
}

.history-result.player-win {
    color: var(--primary-color);
}

.history-result.computer-win {
    color: var(--danger-color);
}

.history-result.draw {
    color: var(--neutral-color);
}

/* 게임 규칙 */
.game-rules {
    background-color: white;
    border-radius: var(--card-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--spacing-xl);
}

.rules-content {
    line-height: 1.8;
    font-size: 0.95rem;
}

.rules-content p {
    margin-bottom: var(--spacing-md);
}

.rules-content ul {
    margin-left: var(--spacing-lg);
    margin-top: var(--spacing-sm);
}

/* 모달 */
.game-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-content {
    background-color: white;
    border-radius: var(--card-radius);
    width: 90%;
    max-width: 450px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
    animation: modalFadeIn 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--card-radius) var(--card-radius) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.close-button {
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    transition: background-color 0.2s ease;
}

.close-button:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: right;
    border-top: 1px solid #e5e7eb;
}

.result-cards {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin: var(--spacing-lg) 0;
}

.result-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.result-card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.result-card-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.result-vs {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.result-message {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

.result-message.player-win {
    background-color: #dbeafe;
    color: var(--primary-color);
}

.result-message.computer-win {
    background-color: #fee2e2;
    color: var(--danger-color);
}

.result-message.draw {
    background-color: #f3f4f6;
    color: var(--secondary-color);
}

.score-change {
    font-size: 1rem;
    margin-top: var(--spacing-xs);
}

.score-status, .final-score {
    text-align: center;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background-color: #f3f4f6;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
}

.special-message {
    color: var(--danger-color);
    text-align: center;
    margin: var(--spacing-md) 0;
    font-weight: 600;
    font-size: 0.95rem;
}

.game-stats, .card-usage-stats {
    margin: var(--spacing-lg) 0;
}

.game-stats h3, .card-usage-stats h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    color: var(--dark-bg);
}

.game-stats p, .card-usage-stats p {
    margin: var(--spacing-xs) 0;
    font-size: 0.95rem;
}

.stats-columns {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.stats-column {
    flex: 1;
}

.stats-column h4 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-bg);
    text-align: center;
}

/* 애니메이션 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.selected {
    animation: pulse 1s infinite;
}

/* 반응형 미디어 쿼리 */
@media (max-width: 480px) {
    .game-container {
        padding: var(--spacing-sm);
    }
    
    .game-board, .history-section, .game-rules {
        padding: var(--spacing-md);
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    .score-value {
        font-size: 2rem;
    }
    
    .round-panel {
        width: 60px;
    }
    
    .card {
        width: 65px;
        height: 95px;
    }
    
    .card-icon {
        font-size: 1.75rem;
    }
    
    .card-name {
        font-size: 0.7rem;
    }
    
    .action-btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.95rem;
    }
    
    .history-header, .history-row {
        grid-template-columns: 0.5fr 1.25fr 1.5fr 1.25fr;
        font-size: 0.8rem;
    }
    
    .history-card-mini {
        font-size: 1rem;
    }
    
    .result-card-icon {
        font-size: 2.5rem;
    }
    
    .result-message {
        font-size: 1.125rem;
    }
    
    .modal-content {
        width: 95%;
    }
}

/* 터치 기기를 위한 개선 */
@media (hover: none) {
    .card:hover:not(.disabled):not(.computer-card) {
        transform: none;
        box-shadow: var(--card-shadow);
    }
    
    .action-btn:hover {
        transform: none;
        box-shadow: var(--card-shadow);
    }
    
    .difficulty-btn:hover {
        transform: none;
    }
    
    /* 터치 피드백 대신 제공 */
    .card:active:not(.disabled):not(.computer-card) {
        transform: scale(0.95);
    }
    
    .action-btn:active {
        transform: scale(0.98);
        background-color: var(--primary-dark);
    }
}