/* ===== 도구 그리드 ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

/* ===== 도구 카드 ===== */
.tool-card {
    background: var(--surface);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: var(--spacing-lg);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tool-card[data-stage="exploration"]:hover {
    border-color: var(--exploration-color);
}

.tool-card[data-stage="synthesis"]:hover {
    border-color: var(--synthesis-color);
}

.tool-card[data-stage="deepening"]:hover {
    border-color: var(--deepening-color);
}

/* ===== 도구 헤더 ===== */
.tool-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    position: relative;
}

.tool-emoji {
    font-size: 2.5rem;
    line-height: 1;
}

.tool-name {
    flex: 1;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.3;
}

.tool-name-ko {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: var(--spacing-xs);
}

/* ===== 인터랙티브 배지 ===== */
.interactive-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background: var(--success-color);
    color: white;
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0 14px 0 8px;
    font-weight: 500;
}

/* ===== 도구 설명 ===== */
.tool-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ===== 도구 메타 정보 ===== */
.tool-meta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.tool-purpose,
.tool-usage {
    color: var(--text-secondary);
    line-height: 1.4;
}

.tool-purpose strong,
.tool-usage strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ===== 기능 태그 ===== */
.tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.feature-tag {
    background: var(--background);
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

/* ===== 과목 태그 ===== */
.tool-subjects {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.subject-tag {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 12px;
    font-weight: 500;
    background: var(--border-color);
    color: var(--text-primary);
}

.subject-tag.korean {
    background: #e8f5e9;
    color: #2e7d32;
}

.subject-tag.math {
    background: #e3f2fd;
    color: #1565c0;
}

.subject-tag.science {
    background: #fce4ec;
    color: #c2185b;
}

.subject-tag.social {
    background: #fff3e0;
    color: #e65100;
}

.subject-tag.art {
    background: #f3e5f5;
    color: #6a1b9a;
}

.subject-tag.all {
    background: var(--primary-color);
    color: white;
}

/* 다크 모드에서의 과목 태그 */
body.dark-mode .subject-tag.korean {
    background: #1b5e20;
    color: #a5d6a7;
}

body.dark-mode .subject-tag.math {
    background: #0d47a1;
    color: #90caf9;
}

body.dark-mode .subject-tag.science {
    background: #880e4f;
    color: #f48fb1;
}

body.dark-mode .subject-tag.social {
    background: #bf360c;
    color: #ffab91;
}

body.dark-mode .subject-tag.art {
    background: #4a148c;
    color: #ce93d8;
}

/* ===== 도구 액션 ===== */
.tool-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
    padding-top: var(--spacing-md);
}

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.tool-link.primary:hover {
    background: darken(var(--primary-color), 10%);
    transform: translateX(2px);
}

.tool-link.github {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.tool-link.github:hover {
    background: var(--background);
    border-color: var(--text-secondary);
}

.github-icon {
    width: 16px;
    height: 16px;
}

/* ===== 검색 섹션 ===== */
.search-section {
    margin-bottom: var(--spacing-xl);
}

.search-wrapper {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) * 3);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--background);
    color: var(--text-primary);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* ===== 검색 결과 하이라이트 ===== */
.tool-card.search-hidden {
    display: none;
}

.tool-card.search-highlight {
    border-color: var(--primary-color);
    background: var(--background);
}

/* ===== 로딩 상태 ===== */
.tool-card.loading {
    background: var(--surface);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}