/* ========================================
   YouTube 스타일 - 메인 페이지
   main.css를 대체함
   ======================================== */

/* ========================================
   Index 페이지 전용 헤더
   ======================================== */
.index-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--yt-dark-bg);
    border-bottom: 1px solid var(--yt-border);
}

.index-nav-home {
    width: 100%;
    justify-content: center;
    padding-top: 1rem;
}

.index-nav-home-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 20px;
    color: #D0D0D0;
    text-decoration: none;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--yt-transition);
    background-color: var(--yt-card-bg);
    text-align: center;
}

.index-nav-home-link i {
    font-size: 16px;
}

.index-nav-home-link:hover {
    background-color: var(--yt-hover-bg);
    color: #E0E0E0;
}

.index-header-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    padding: 12px 24px;
    gap: 0;
}

.index-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--yt-text-primary);
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    flex-shrink: 0;
    align-self: flex-start;
}

.index-logo i {
    color: var(--yt-red);
    font-size: 22px;
}

.index-logo:hover {
    color: var(--yt-white);
}

.index-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    margin-top: 8px;
}

.index-nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    color: var(--yt-text-primary);
    text-decoration: none;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--yt-transition);
    white-space: nowrap;
}

.index-nav-link i {
    font-size: 16px;
}

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

.index-user {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    align-self: flex-end;
    position: absolute;
    right: 24px;
    top: 12px;
}

.index-username {
    color: var(--yt-text-primary);
    font-size: 14px;
    font-weight: 500;
}

.index-icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--yt-text-primary);
    background-color: transparent;
    border-radius: 50%;
    transition: var(--yt-transition);
    text-decoration: none;
}

.index-icon-btn i {
    font-size: 20px;
}

.index-icon-btn:hover {
    background-color: var(--yt-hover-bg);
}

.index-login-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background-color: #ff0000;
    color: white;
    text-decoration: none;
    border-radius: 18px;
    font-size: 14px;
    font-weight: 500;
    transition: background-color .3s;
}

.index-login-btn:hover {
    background-color: #cc0000;
    color: white;
}

/* 메인 컨테이너 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--yt-spacing-xl);
    background-color: transparent;
}

/* 카테고리 타이틀 */
.category-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--yt-text-primary);
    margin-bottom: var(--yt-spacing-xl);
    padding-bottom: var(--yt-spacing-md);
    border-bottom: 1px solid var(--yt-divider);
}

/* 그리드 컨테이너 */
.grid-container {
    display: flex;
    flex-direction: column;
    gap: var(--yt-spacing-2xl);
}

/* 랜덤 이미지 그리드 */
.random-grid-container {
    margin-bottom: var(--yt-spacing-xl);
}

.random-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--yt-spacing-md);
    margin-bottom: var(--yt-spacing-lg);
}

.random-grid img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--yt-radius-sm);
    cursor: pointer;
    transition: var(--yt-transition);
}

.random-grid img:hover {
    transform: scale(1.05);
    border-radius: var(--yt-radius-md);
}

/* 메뉴 섹션 (모바일 대응) */
.menu-section {
    display: grid;
    grid-template-columns: repeat(3, 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);
    overflow: hidden;
    transition: var(--yt-transition);
    position: relative;
    min-height: 50px;
}

.menu-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--yt-red);
    opacity: 0;
    transition: var(--yt-transition);
}

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

.menu-item:hover::before {
    opacity: 1;
}

.menu-item a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 0.5rem;
    color: #D0D0D0;
    text-decoration: none;
    transition: var(--yt-transition);
}

.menu-icon {
    display: none; /* 모바일에서는 아이콘 숨김 */
}

.menu-text {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.menu-title {
    font-size: 14px;
    font-weight: 500;
    color: #D0D0D0;
    white-space: nowrap;
}

.menu-desc {
    display: none;
}

/* 달력 섹션 */
.calendar-section {
    background-color: var(--yt-card-bg);
    border-radius: var(--yt-radius-lg);
    padding: var(--yt-spacing-xl);
    border: 1px solid var(--yt-border);
}

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

.calendar-header h2 {
    font-size: 20px;
    font-weight: 500;
    color: var(--yt-text-primary);
    margin-bottom: var(--yt-spacing-md);
}

.date-selector {
    display: flex;
    justify-content: center;
    gap: var(--yt-spacing-md);
}

.date-select {
    padding: var(--yt-spacing-sm) var(--yt-spacing-md);
    background-color: var(--yt-hover-bg);
    color: var(--yt-text-primary);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-sm);
    font-size: 14px;
}

.date-select:focus {
    outline: none;
    border-color: var(--yt-blue);
}

/* 달력 그리드 */
.calendar {
    max-width: 600px;
    margin: 0 auto;
}

.days-of-week,
.days-container {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--yt-spacing-xs);
}

.day-header {
    text-align: center;
    padding: var(--yt-spacing-sm);
    font-size: 12px;
    font-weight: 500;
    color: var(--yt-text-secondary);
    background-color: var(--yt-hover-bg);
    border-radius: var(--yt-radius-sm);
}

.day {
    text-align: center;
    padding: var(--yt-spacing-md);
    background-color: var(--yt-hover-bg);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-sm);
    cursor: pointer;
    transition: var(--yt-transition);
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--yt-text-primary);
}

.day:hover {
    background-color: var(--yt-border);
    border-color: var(--yt-divider);
}

.day.has-memo {
    background-color: var(--yt-red);
    color: var(--yt-white);
    border-color: var(--yt-red);
}

.day.selected {
    background-color: var(--yt-blue);
    color: var(--yt-white);
    border-color: var(--yt-blue);
}

.day.empty {
    background-color: transparent;
    border-color: transparent;
    cursor: default;
}

/* 메모 섹션 */
.memo-section {
    margin-top: var(--yt-spacing-xl);
    padding: var(--yt-spacing-lg);
    background-color: var(--yt-hover-bg);
    border-radius: var(--yt-radius-md);
    border: 1px solid var(--yt-border);
}

.memo-section h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--yt-text-primary);
    margin-bottom: var(--yt-spacing-md);
}

.memo-input-area {
    display: flex;
    gap: var(--yt-spacing-md);
    margin-bottom: var(--yt-spacing-md);
}

#memoInput {
    flex: 1;
    padding: var(--yt-spacing-md);
    background-color: var(--yt-card-bg);
    color: var(--yt-text-primary);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-sm);
    font-size: 14px;
    resize: vertical;
    min-height: 60px;
    font-family: inherit;
}

#memoInput:focus {
    outline: none;
    border-color: var(--yt-blue);
}

.memo-list {
    display: flex;
    flex-direction: column;
    gap: var(--yt-spacing-sm);
}

.memo-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--yt-spacing-md);
    background-color: var(--yt-card-bg);
    border-radius: var(--yt-radius-sm);
    border-left: 3px solid var(--yt-red);
}

.memo-text {
    flex: 1;
    margin-right: var(--yt-spacing-md);
    font-size: 14px;
    color: var(--yt-text-primary);
}

/* 카테고리 관리 */
.category-container {
    display: flex;
    align-items: center;
    gap: var(--yt-spacing-md);
    margin-bottom: var(--yt-spacing-lg);
}

.category-container select {
    flex: 1;
    padding: var(--yt-spacing-md);
    background-color: var(--yt-card-bg);
    color: var(--yt-text-primary);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-sm);
    font-size: 14px;
}

.category-management {
    display: flex;
    gap: var(--yt-spacing-sm);
}

.category-btn {
    width: 44px;
    height: 44px;
    background-color: var(--yt-hover-bg);
    color: var(--yt-text-primary);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--yt-transition);
    font-size: 18px;
}

.category-btn:hover {
    background-color: var(--yt-border);
    border-color: var(--yt-divider);
}

/* 로그인 페이지 스타일 */
.loginSub {
    max-width: 420px;
    margin: 50px auto;
    padding: var(--yt-spacing-2xl);
    background-color: var(--yt-card-bg);
    border-radius: var(--yt-radius-lg);
    box-shadow: var(--yt-shadow-lg);
    border: 1px solid var(--yt-border);
}

.login-header h1 {
    font-size: 24px;
    font-weight: 500;
    color: var(--yt-text-primary);
    text-align: center;
    margin-bottom: var(--yt-spacing-xl);
}

.signup-link {
    text-align: center;
    margin-top: var(--yt-spacing-xl);
    padding-top: var(--yt-spacing-xl);
    border-top: 2px solid var(--yt-border);
}

.signup-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #FFFFFF !important;
    text-decoration: none;
    border-radius: var(--yt-radius-md);
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    border: 2px solid transparent;
    min-width: 180px;
    width: 100%;
    max-width: 300px;
}

.signup-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.6);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    border-color: rgba(255, 255, 255, 0.3);
}

.signup-btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.signup-btn i {
    font-size: 18px;
    color: #FFFFFF !important;
}

/* 모바일 최적화 */
@media (max-width: 768px) {
    .index-header-content {
        padding: 10px 16px;
        flex-wrap: wrap;
    }
    
    .index-logo {
        font-size: 16px;
    }
    
    .index-logo i {
        font-size: 20px;
    }
    
    .index-nav {
        width: 100%;
        order: 3;
        justify-content: space-around;
        gap: 4px;
        padding-top: 8px;
        border-top: 1px solid var(--yt-border);
    }
    
    .index-nav-link {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .index-nav-link i {
        font-size: 14px;
    }
    
    .index-username {
        display: none;
    }
    
    .index-icon-btn {
        width: 36px;
        height: 36px;
    }
    
    .index-icon-btn i {
        font-size: 18px;
    }
    
    .container {
        padding: var(--yt-spacing-lg);
    }
    
    .random-grid {
        gap: var(--yt-spacing-xs);
    }
    
    .menu-section {
        gap: var(--yt-spacing-xs);
    }
    
    .menu-title {
        font-size: 13px;
    }
    
    .calendar-section {
        padding: var(--yt-spacing-lg);
    }
    
    .date-selector {
        flex-direction: column;
        align-items: center;
    }
    
    .day {
        padding: var(--yt-spacing-sm);
        min-height: 50px;
        font-size: 12px;
    }
    
    .memo-input-area {
        flex-direction: column;
    }
    
    .memo-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--yt-spacing-sm);
    }
    
    .loginSub {
        max-width: 100%;
        margin: 20px auto;
        padding: var(--yt-spacing-xl);
    }
    
    .signup-btn {
        padding: 16px 24px;
        font-size: 16px;
        min-width: 100%;
        max-width: 100%;
    }
    
    .signup-btn i {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--yt-spacing-md);
    }
    
    .random-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .category-title {
        font-size: 18px;
    }
    
    .day {
        padding: var(--yt-spacing-xs);
        min-height: 40px;
        font-size: 11px;
    }
    
    .calendar-header h2 {
        font-size: 18px;
    }
}

/* Index 페이지 푸터 */
.index-footer {
    background-color: var(--yt-dark-bg);
    border-top: 1px solid var(--yt-border);
    padding: 16px 24px;
    margin-top: 48px;
    text-align: center;
}

.index-footer p {
    margin: 0;
    font-size: 12px;
    color: var(--yt-text-secondary);
}