/* 
 * 생각이 보이는 교실 - 테마 스타일시트
 * Theme stylesheet for dark mode and theme variations
 */

/* ===== 다크모드 스타일 ===== */
[data-theme="dark"] {
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-light: #cbd5e0;
    --background-gradient: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --card-hover-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .header {
    background: rgba(74, 85, 104, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .main-content {
    background: #2d3748;
    border: 1px solid #4a5568;
}

[data-theme="dark"] .tool-card {
    background: #4a5568;
    border: 2px solid #718096;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .tool-card:hover {
    border-color: #a0aec0;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .stats-section {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    border: 1px solid #4a5568;
}

[data-theme="dark"] .about-section {
    background: #2d3748;
    border-top: 1px solid #4a5568;
    border-bottom: 1px solid #4a5568;
}

[data-theme="dark"] .footer {
    background: #1a202c;
    border-top: 1px solid #4a5568;
}

/* ===== 테마 토글 버튼 ===== */
.theme-toggle {
    background: none;
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--primary-color);
    margin-left: 1rem;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

.theme-toggle:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

.theme-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

[data-theme="dark"] .theme-icon.sun {
    transform: rotate(180deg);
}

/* ===== 고대비 모드 지원 ===== */
@media (prefers-contrast: high) {
    :root {
        --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        --border-radius: 8px;
    }
    
    .tool-card {
        border: 2px solid var(--text-primary);
    }
}

/* ===== 시스템 테마 설정 감지 ===== */
@media (prefers-color-scheme: dark) {
    /* 사용자가 테마를 수동으로 설정하지 않은 경우 적용 */
    :root:not([data-theme]) {
        --text-primary: #f7fafc;
        --text-secondary: #e2e8f0;
        --text-light: #cbd5e0;
        --background-gradient: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
        --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        --card-hover-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
    }
}