/* 
 * 생각이 보이는 교실 - 검색 및 필터 스타일
 * Search and filter components styles
 */

/* ===== 검색 바 ===== */
.search-section {
    padding: 2rem 0 1rem;
    background: linear-gradient(to bottom, white, rgba(255, 255, 255, 0.95));
    position: sticky;
    top: 70px;
    z-index: 100;
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .search-section {
    background: linear-gradient(to bottom, #2d3748, rgba(45, 55, 72, 0.95));
}

.search-wrapper {
    max-width: 600px;
    margin: 0 auto 2rem;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 1rem 3rem 1rem 3rem;
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    background: white;
    color: var(--text-primary);
}

[data-theme="dark"] .search-input {
    background: #4a5568;
    border-color: #718096;
    color: var(--text-primary);
}

.search-input:focus {
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
    transform: translateY(-1px);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.search-clear {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
    opacity: 0;
    pointer-events: none;
}

.search-input:not(:placeholder-shown) ~ .search-clear {
    opacity: 1;
    pointer-events: auto;
}

.search-clear:hover {
    color: var(--text-primary);
}

/* ===== 카테고리 필터 ===== */
.filter-section {
    margin-bottom: 2rem;
}

.filter-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.filter-btn {
    background: white;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.5rem 1.25rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

[data-theme="dark"] .filter-btn {
    background: #4a5568;
    border-color: #718096;
    color: var(--text-primary);
}

.filter-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

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

.filter-btn.active:hover {
    background: var(--primary-dark);
}

.filter-count {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-left: 0.25rem;
}

/* ===== 결과 카운트 ===== */
.result-info {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

#result-count {
    font-weight: 500;
    color: var(--primary-color);
}

/* ===== 도구 카드 카테고리 태그 ===== */
.tool-category-tag {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(74, 144, 226, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

[data-theme="dark"] .tool-category-tag {
    background: rgba(74, 144, 226, 0.2);
}

/* ===== 로딩 상태 ===== */
.loading-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(74, 144, 226, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== 에러/빈 상태 ===== */
.no-results,
.error-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.no-results p,
.error-state p {
    margin-bottom: 1rem;
}

.error-state button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.error-state button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ===== 반응형 디자인 ===== */
@media (max-width: 768px) {
    .search-section {
        top: 60px;
        padding: 1rem 0 0.5rem;
    }

    .search-wrapper {
        margin-bottom: 1rem;
    }

    .search-input {
        font-size: 0.9rem;
        padding: 0.75rem 2.5rem;
    }

    .filter-wrapper {
        gap: 0.5rem;
    }

    .filter-btn {
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }

    .tool-category-tag {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }
}

/* ===== 고급 필터 (향후 확장용) ===== */
.advanced-filters {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(74, 144, 226, 0.05);
    border-radius: 12px;
    display: none;
}

.advanced-filters.show {
    display: block;
}

.filter-group {
    margin-bottom: 1rem;
}

.filter-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.filter-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    background: white;
    color: var(--text-primary);
}

[data-theme="dark"] .filter-group select {
    background: #4a5568;
    border-color: #718096;
}