/**
 * Lahochi System - Layout Styles
 * 整體布局：Header、Main、Footer
 */

/* ========================================
   容器系統
   ======================================== */

.container {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
    box-sizing: border-box;
}

@media (min-width: 640px) {
    .container { max-width: var(--container-sm); }
}

@media (min-width: 768px) {
    .container { max-width: var(--container-md); padding: 0 var(--spacing-6); }
}

@media (min-width: 1024px) {
    .container { max-width: var(--container-lg); }
}

@media (min-width: 1280px) {
    .container { max-width: var(--container-xl); }
}

.container-fluid {
    width: 100%;
    max-width: 100%;
    padding: 0 var(--spacing-4);
    box-sizing: border-box;
}

/* ========================================
   Header 樣式
   ======================================== */

.header {
    background-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
}

/* Logo 區域 */
.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    text-decoration: none;
    color: var(--color-text-white);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.header-logo img {
    height: 50px;
    width: auto;
}

.header-logo:hover {
    opacity: 0.9;
    text-decoration: none;
}

/* 導覽列 */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.nav-link {
    color: var(--color-text-white);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 語言切換器 */
.lang-switcher {
    position: relative;
}

.lang-switcher select {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-2) var(--spacing-6) var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='white' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-2) center;
}

.lang-switcher select:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.lang-switcher select option {
    background-color: var(--color-primary);
    color: var(--color-text-white);
}

/* 漢堡選單（手機版） */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-white);
    font-size: var(--font-size-2xl);
    padding: var(--spacing-2);
    cursor: pointer;
}

/* ========================================
   Main 區域
   ======================================== */

.main {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-4) 0;
}

/* Dashboard 專用：移除上方 padding */
.page-dashboard .main {
    padding-top: 0;
    padding-bottom: 0;
}

/* Course Manage 專用：縮小上方 padding 至 8px */
.page-course-manage .main {
    padding-top: 0.5rem;
    padding-bottom: 0;
}

/* 統一的頁面標題列 */
.page-title-bar {
    background: white;
    border-bottom: 1px solid var(--color-border-light);
    padding: 1.25rem 0;
    margin-bottom: var(--spacing-8);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.page-title-bar h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-title-bar h1 i {
    font-size: 1.5rem;
}

.page-title-bar p {
    color: var(--color-text-secondary);
    margin: 0.5rem 0 0 0;
    font-size: var(--font-size-sm);
}

.main-content {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Hero 區塊 */
/* Hero 區塊已移除，使用統一的 page-title-bar 代替 */

/* ========================================
   Footer 樣式
   ======================================== */

.footer {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    padding: var(--spacing-6) 0;
    margin-top: var(--spacing-12);
}

.footer-copyright {
    text-align: center;
    opacity: 0.9;
}

/* ========================================
   網格系統
   ======================================== */

.grid {
    display: grid;
    gap: var(--spacing-5);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ========================================
   Flexbox 工具
   ======================================== */

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

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

.justify-center {
    justify-content: center;
}

.gap-2 { gap: var(--spacing-2); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

/* ========================================
   響應式布局
   ======================================== */

@media (max-width: 767px) {
    /* 手機版容器 padding 調整 */
    .container {
        padding: 0 0.5rem;
    }
    
    .container-fluid {
        padding: 0 0.5rem;
    }
    
    /* 手機版 Header */
    .header-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-primary);
        flex-direction: column;
        padding: var(--spacing-4);
        box-shadow: var(--shadow-lg);
    }
    
    .header-nav.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    /* 手機版頁面標題 */
    .page-title-bar h1 {
        font-size: 1.5rem;
    }
    
    /* 手機版網格 */
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: repeat(1, 1fr);
    }
    
    /* 手機版 Footer */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    /* 平板版網格 */
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========================================
   列印樣式
   ======================================== */

@media print {
    .header,
    .footer,
    .mobile-menu-toggle,
    .lang-switcher {
        display: none;
    }
    
    .main {
        min-height: auto;
        padding: 0;
    }
}

/* ========================================
   Home Page & Section Styles (Phase 1 Refactor)
   首頁文字放大 2 級
   ======================================== */

/* 首頁整體文字放大 */
.page-home .card-body {
    font-size: var(--font-size-lg);  /* 從 base(16px) 放大到 lg(18px) */
}

/* Announcement Section */
.announcement-item {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border-light);
}

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

.announcement-title {
    margin-bottom: 0.5rem;
    font-size: var(--font-size-xl);  /* 放大公告標題 */
}

.announcement-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
}

.announcement-link:hover {
    text-decoration: underline;
}

.announcement-meta {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);  /* 從 sm(14px) 放大到 base(16px) */
    margin-bottom: 0.5rem;
}

.announcement-content {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);  /* 放大公告內容 */
}

.announcement-detail-link {
    color: var(--color-primary);
    font-weight: 500;
    margin-left: 0.5rem;
    text-decoration: none;
}

.announcement-detail-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Section Footer (View More Buttons) */
.section-footer {
    text-align: center;
    margin-top: 2rem;
}

/* Course Card Actions */
.course-card-action {
    margin-top: 1rem;
    width: 100%;
}

/* Table Card Actions (Mobile) */
.table-card-action {
    margin-top: 1rem;
}

.table-card-btn {
    width: 100%;
}

/* User Card Styles */
.user-card {
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.user-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.badge-senior {
    margin-top: 0.5rem;
}