/**
 * SNS Stylesheet
 * Custom styles for SNS platform
 */

/* ============ 변수 ============ */
:root {
    --sns-primary: #0066cc;
    --sns-secondary: #6c757d;
    --sns-success: #28a745;
    --sns-danger: #dc3545;
    --sns-warning: #ffc107;
    --sns-info: #17a2b8;
    --sns-border: #e1e8ed;
    --sns-hover: #f7f9fa;
}

/* ============ 컨테이너 ============ */
.sns-container {
    max-width: 1400px;
}

/* ============ 카드 스타일 ============ */
.card {
    border: 1px solid var(--sns-border);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid var(--sns-border);
    padding: 1rem;
    font-weight: 600;
}

/* ============ 버튼 스타일 ============ */
.btn-link {
    color: var(--sns-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.btn-link:hover {
    color: var(--sns-primary);
}

.like-btn.liked {
    color: var(--sns-danger);
}

.like-btn.liked i::before {
    content: '\F5A6';
}

/* ============ 게시글 카드 ============ */
.post-card {
    border-bottom: 1px solid var(--sns-border);
    padding: 1rem;
    transition: background-color 0.2s ease;
}

.post-card:hover {
    background-color: var(--sns-hover);
}

.post-content {
    font-size: 1rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.post-meta {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: var(--sns-secondary);
    font-size: 0.875rem;
}

.post-actions {
    display: flex;
    justify-content: space-around;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--sns-border);
}

.post-action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--sns-secondary);
    border: none;
    background: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.post-action-btn:hover {
    background-color: rgba(0, 102, 204, 0.1);
    color: var(--sns-primary);
}

/* ============ 피드 컨테이너 ============ */
.feed-container {
    display: flex;
    flex-direction: column;
}

.feed-container .card {
    border-bottom: 1px solid var(--sns-border);
    border-radius: 0;
    box-shadow: none;
    margin-bottom: 0;
}

.feed-container .card:last-child {
    border-bottom: none;
}

/* ============ 사용자 카드 ============ */
.user-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--sns-border);
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    color: #000;
    text-decoration: none;
}

.user-handle {
    color: var(--sns-secondary);
    font-size: 0.875rem;
}

.user-bio {
    color: #000;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    word-wrap: break-word;
}

/* ============ 트렌딩 토픽 ============ */
.trending-container {
    display: flex;
    flex-direction: column;
}

.trending-item {
    padding: 1rem;
    border-bottom: 1px solid var(--sns-border);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.trending-item:hover {
    background-color: var(--sns-hover);
}

.trending-title {
    font-weight: 600;
    color: #000;
}

.trending-count {
    color: var(--sns-secondary);
    font-size: 0.875rem;
}

/* ============ 추천 사용자 ============ */
.recommend-container {
    display: flex;
    flex-direction: column;
}

.recommend-item {
    padding: 1rem;
    border-bottom: 1px solid var(--sns-border);
}

.recommend-item:last-child {
    border-bottom: none;
}

/* ============ 모달 ============ */
.modal-content {
    border: 1px solid var(--sns-border);
    border-radius: 12px;
}

.modal-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid var(--sns-border);
}

/* ============ 네비게이션 탭 ============ */
.nav-tabs {
    border-bottom: 1px solid var(--sns-border);
}

.nav-tabs .nav-link {
    color: var(--sns-secondary);
    border: none;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--sns-primary);
    border-bottom-color: rgba(0, 102, 204, 0.3);
}

.nav-tabs .nav-link.active {
    color: var(--sns-primary);
    border-bottom-color: var(--sns-primary);
    background: none;
}

/* ============ 배지 ============ */
.badge {
    border-radius: 20px;
    padding: 0.35rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ============ 스피너 ============ */
.spinner-border {
    color: var(--sns-primary);
}

/* ============ 알림 ============ */
.alert {
    border-radius: 8px;
    border: 1px solid transparent;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* ============ 프로필 페이지 ============ */
.profile-header {
    background: linear-gradient(135deg, var(--sns-primary) 0%, #0052a3 100%);
    color: white;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.profile-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.profile-stat {
    text-align: center;
}

.profile-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.profile-stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ============ 사용자 목록 ============ */
.users-container {
    display: flex;
    flex-direction: column;
}

.users-container .card {
    border: 1px solid var(--sns-border);
    margin-bottom: 1rem;
}

/* ============ 탐색 페이지 ============ */
.search-input {
    border-radius: 24px;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--sns-border);
    transition: border-color 0.2s ease;
}

.search-input:focus {
    border-color: var(--sns-primary);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

/* ============ 토픽 ============ */
.topic-card {
    border: 1px solid var(--sns-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
}

.topic-card:hover {
    border-color: var(--sns-primary);
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.1);
}

.topic-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--sns-primary);
}

.topic-description {
    color: var(--sns-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* ============ 반응형 ============ */
@media (max-width: 768px) {
    .sns-container {
        padding: 0;
    }

    .card {
        border-radius: 0;
    }

    .post-actions {
        justify-content: space-between;
    }

    .profile-stats {
        flex-wrap: wrap;
    }

    .btn-group {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .sticky-top {
        position: relative !important;
        top: auto !important;
    }
}

/* ============ 다크 모드 ============ */
[data-bs-theme="dark"] {
    --sns-border: #36454f;
    --sns-hover: #2a2f33;
}

[data-bs-theme="dark"] .card {
    background-color: #1e1e1e;
    border-color: var(--sns-border);
}

[data-bs-theme="dark"] .card-header {
    background-color: #282828;
}

[data-bs-theme="dark"] .post-card:hover,
[data-bs-theme="dark"] .trending-item:hover {
    background-color: var(--sns-hover);
}

[data-bs-theme="dark"] .user-name,
[data-bs-theme="dark"] .trending-title {
    color: #e0e0e0;
}

[data-bs-theme="dark"] .modal-content {
    background-color: #1e1e1e;
}

[data-bs-theme="dark"] .modal-header {
    background-color: #282828;
    border-color: var(--sns-border);
}

[data-bs-theme="dark"] .alert-info {
    background-color: #164a62;
    border-color: #0c5460;
}

[data-bs-theme="dark"] .alert-success {
    background-color: #1d4028;
    border-color: #155724;
}

[data-bs-theme="dark"] .alert-danger {
    background-color: #5a1e1e;
    border-color: #721c24;
}

/* ============ 알림 ============ */
.notif-unread {
    background-color: #f0f7ff;
}

.notif-item:hover {
    background-color: var(--sns-hover);
}

[data-bs-theme="dark"] .notif-unread {
    background-color: #1a2a3a;
}

/* ============ 댓글 ============ */
.comment-like-btn.liked {
    color: var(--sns-danger);
}

.comment-like-btn {
    color: var(--sns-secondary);
    font-size: 0.8rem;
    transition: color 0.15s ease;
}

.comment-like-btn:hover {
    color: var(--sns-danger);
}

/* ============ 좋아요 버튼 ============ */
.like-btn.liked {
    color: var(--sns-danger);
}

.like-btn.liked i {
    color: var(--sns-danger);
}

/* ============ 애니메이션 ============ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.3s ease;
}

/* ============ 유틸리티 클래스 ============ */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.text-truncate-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.gap-1-5 {
    gap: 0.75rem;
}

.rounded-xl {
    border-radius: 16px;
}

.transition-all {
    transition: all 0.3s ease;
}