/* ========================================
   YouTube 기반 공통 스타일
   모든 페이지에서 사용됨
   ======================================== */

/* 메인 헤더 및 네비게이션 */
.header {
    background-color: var(--yt-darker-bg);
    border-bottom: 1px solid var(--yt-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--yt-spacing-md) var(--yt-spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--yt-text-primary);
    display: flex;
    align-items: center;
    gap: var(--yt-spacing-sm);
}

.site-logo {
    color: var(--yt-red);
    font-size: 28px;
}

/* 유저 섹션 */
.user-section {
    display: flex;
    align-items: center;
    gap: var(--yt-spacing-lg);
}

.user-greeting {
    font-size: 14px;
    color: var(--yt-text-secondary);
}

.login-button,
.logout-button {
    padding: var(--yt-spacing-sm) var(--yt-spacing-lg);
    background-color: var(--yt-hover-bg);
    color: var(--yt-text-primary);
    border-radius: var(--yt-radius-full);
    font-size: 14px;
    font-weight: 500;
    transition: var(--yt-transition);
}

.login-button:hover,
.logout-button:hover {
    background-color: var(--yt-border);
}

/* 네비게이션 메뉴 */
.navigation {
    background-color: var(--yt-card-bg);
    border-bottom: 1px solid var(--yt-border);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    gap: var(--yt-spacing-sm);
    padding: var(--yt-spacing-md) var(--yt-spacing-xl);
}

.nav-link {
    padding: var(--yt-spacing-sm) var(--yt-spacing-md);
    color: var(--yt-text-primary);
    text-decoration: none;
    border-radius: var(--yt-radius-sm);
    font-size: 15px;
    font-weight: 500;
    transition: var(--yt-transition);
    display: inline-flex;
    align-items: center;
    gap: var(--yt-spacing-xs);
    white-space: nowrap;
}

.nav-link:hover {
    background-color: var(--yt-hover-bg);
}

.nav-link i {
    font-size: 13px;
}

/* 메뉴 네비게이션 */
.menu-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--yt-spacing-md);
    margin-bottom: var(--yt-spacing-xl);
}

.menu-item {
    background-color: var(--yt-card-bg);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-md);
    padding: var(--yt-spacing-lg);
    transition: var(--yt-transition);
    display: flex;
    align-items: center;
    gap: var(--yt-spacing-md);
}

.menu-item:hover {
    background-color: var(--yt-hover-bg);
    border-color: var(--yt-divider);
    transform: translateY(-2px);
}

.menu-icon {
    font-size: 32px;
    color: var(--yt-red);
}

.menu-text {
    flex: 1;
}

.menu-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--yt-text-primary);
    margin-bottom: var(--yt-spacing-xs);
}

.menu-desc {
    font-size: 12px;
    color: var(--yt-text-secondary);
}

/* 로그인 페이지 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--yt-dark-bg);
    padding: var(--yt-spacing-xl);
}

.login-card {
    background-color: var(--yt-card-bg);
    border-radius: var(--yt-radius-lg);
    box-shadow: var(--yt-shadow-lg);
    padding: var(--yt-spacing-2xl);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: var(--yt-spacing-xl);
}

.login-header h1 {
    font-size: 24px;
    font-weight: 500;
    color: var(--yt-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--yt-spacing-sm);
}

.login-header .site-logo {
    color: var(--yt-red);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--yt-spacing-lg);
}

.logindiv {
    margin-bottom: var(--yt-spacing-lg);
}

.logindiv label {
    display: block;
    margin-bottom: var(--yt-spacing-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--yt-text-primary);
}

.logindiv input {
    width: 100%;
    padding: var(--yt-spacing-md);
    background-color: var(--yt-darker-bg);
    color: var(--yt-text-primary);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-sm);
    font-size: 14px;
    transition: var(--yt-transition);
}

.logindiv input:focus {
    outline: none;
    border-color: var(--yt-blue);
    background-color: var(--yt-dark-bg);
}

.loginbtn input {
    width: 100%;
    padding: var(--yt-spacing-md);
    background-color: var(--yt-red);
    color: var(--yt-white);
    border: none;
    border-radius: var(--yt-radius-full);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--yt-transition);
}

.loginbtn input:hover {
    background-color: var(--yt-red-hover);
}

/* 게시판 목록 공통 스타일 */
.board-container,
.post-list-container {
    background-color: var(--yt-dark-bg);
    border-radius: var(--yt-radius-md);
    padding: var(--yt-spacing-lg);
}

.board-header,
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--yt-spacing-xl);
    padding-bottom: var(--yt-spacing-md);
    border-bottom: 1px solid var(--yt-divider);
}

.board-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--yt-text-primary);
}

/* 게시물 목록 */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    background-color: var(--yt-card-bg);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-md);
    overflow: hidden;
}

.post-item {
    background-color: var(--yt-card-bg);
    border-bottom: 1px solid var(--yt-border);
    padding: var(--yt-spacing-lg);
    transition: var(--yt-transition);
    text-decoration: none;
    display: block;
}

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

.post-item:hover {
    background-color: var(--yt-hover-bg);
}

.post-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--yt-text-primary);
}

.post-content {
    flex: 1;
    min-width: 0;
}

.post-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--yt-text-primary);
    margin-bottom: var(--yt-spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.post-meta {
    font-size: 12px;
    color: var(--yt-text-secondary);
    display: flex;
    gap: var(--yt-spacing-md);
    margin-top: var(--yt-spacing-xs);
}

.post-author,
.post-date {
    display: flex;
    align-items: center;
    gap: var(--yt-spacing-xs);
}

.post-author::before {
    content: "👤";
    font-size: 12px;
}

.post-date::before {
    content: "📅";
    font-size: 12px;
}

.post-arrow {
    color: var(--yt-text-disabled);
}

/* 푸터 */
.footer {
    text-align: center;
    padding: var(--yt-spacing-2xl);
    color: var(--yt-text-secondary);
    font-size: 12px;
    border-top: 1px solid var(--yt-divider);
    margin-top: var(--yt-spacing-2xl) * 2;
}

/* 유틸리티 클래스 */
.desktop-only {
    display: block;
}

@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }
}

/* 모바일 최적화 */
@media (max-width: 768px) {
    .header-content {
        padding: var(--yt-spacing-md);
        flex-direction: column;
        gap: var(--yt-spacing-md);
    }
    
    .user-section {
        width: 100%;
        justify-content: space-between;
    }
    
    .menu-section {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--yt-spacing-sm);
    }
    
    .menu-item {
        padding: var(--yt-spacing-md);
    }
    
    .menu-icon {
        font-size: 24px;
    }
    
    .menu-title {
        font-size: 14px;
    }
    
    .menu-desc {
        font-size: 11px;
    }
    
    .login-card {
        padding: var(--yt-spacing-xl);
    }
    
    .board-header,
    .list-header {
        flex-direction: column;
        gap: var(--yt-spacing-md);
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 18px;
    }
    
    .site-logo {
        font-size: 24px;
    }
    
    .menu-section {
        grid-template-columns: 1fr;
    }
    
    .post-link {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--yt-spacing-sm);
    }
    
    .post-meta {
        flex-direction: column;
        gap: var(--yt-spacing-xs);
    }
}