/* code.com.cfd - 簡約淡色系主題 */

/* 變數定義 */
:root {
    /* 色彩系統 - 淡色系調 */
    --color-bg-primary: #fafafa;
    --color-bg-secondary: #f5f5f5;
    --color-bg-tertiary: #eeeeee;

    --color-text-primary: #2c3e50;
    --color-text-secondary: #5a6c7d;
    --color-text-muted: #8a9ba8;

    --color-accent-primary: #3498db;
    --color-accent-secondary: #2980b9;
    --color-accent-hover: #1e6fa8;

    --color-success: #27ae60;
    --color-warning: #f39c12;
    --color-error: #e74c3c;

    --color-border-light: #e8e8e8;
    --color-border-medium: #d0d0d0;

    /* 陰影和圓角 */
    --shadow-soft: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-hard: rgba(0, 0, 0, 0.15);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* 間距系統 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* 動畫 */
    --transition-fast: all 0.15s ease;
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* 字體 */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
}

/* 基礎重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    font-size: var(--font-size-base);
}

/* 容器系統 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

/* Hero 區域樣式 */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 快速導航卡片 */
.quick-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: 4rem;
}

.nav-card {
    background: white;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--shadow-soft);
    border-color: var(--color-accent-primary);
}

.nav-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    opacity: 0;
    transition: var(--transition-normal);
}

.nav-card:hover::before {
    opacity: 1;
}

.nav-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.nav-card p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.nav-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--color-accent-primary);
}

/* 狀態指示器 */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
}

/* 按鈕組件 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--color-accent-secondary);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
}

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-medium);
}

/* 卡片組件 */
.card {
    background: white;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    transition: var(--transition-normal);
}

.card:hover {
    box-shadow: 0 8px 25px var(--shadow-soft);
    border-color: var(--color-border-medium);
}

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.card-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.card-content {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .hero {
        padding: 4rem 0 3rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .quick-nav {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .nav-card {
        padding: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .nav-card {
        padding: var(--spacing-lg);
    }
}

/* 動畫效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

.pulse {
    animation: pulse 2s infinite;
}

/* 工具類 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.items-center { align-items: center; }
.flex-wrap { flex-wrap: wrap; }

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* 導航欄組件 */
.navbar {
    background: white;
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.logo-link {
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.logo-link:hover {
    color: var(--color-accent-primary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-item {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: var(--transition-fast);
}

.nav-item:hover {
    color: var(--color-accent-primary);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-primary);
    transition: var(--transition-fast);
}

.nav-item:hover::after {
    width: 100%;
}

/* 響應式導航欄 */
@media (max-width: 768px) {
    .navbar .container {
        padding: 0 var(--spacing-md);
    }

    .nav-links {
        gap: var(--spacing-md);
    }

    .logo-text {
        font-size: 1.125rem;
    }

    .domain-badge {
        display: none;
    }
}

/* 小型設備調整 */
@media (max-width: 480px) {
    .navbar {
        padding: var(--spacing-sm) 0;
    }

    .logo-text {
        font-size: 1rem;
    }

    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
}

/* 導航欄固定效果 */
.navbar.sticky {
    box-shadow: 0 2px 20px var(--shadow-soft);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.navbar.sticky.dark-theme,
.navbar.sticky:root.dark-theme {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    background: rgba(15, 20, 25, 0.95);
}

/* 平滑滾動效果 */
html {
    scroll-behavior: smooth;
}

/* 滾動進度指示器 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    transform-origin: 0%;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.scroll-progress.visible {
    opacity: 1;
}

/* 暗色模式導航欄調整 */
@media (prefers-color-scheme: dark) {
    .navbar {
        background: rgba(15, 20, 25, 0.9);
        border-bottom-color: var(--color-border-light);
    }
}

/* 動畫效果 */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-down {
    animation: slideDown 0.3s ease-out forwards;
}

/* 工具類補充 */
.ml-auto { margin-left: auto; }
.text-bold { font-weight: 700; }

/* 手動暗色模式覆蓋 */
.dark-theme {
    --color-bg-primary: #0f1419;
    --color-bg-secondary: #1a1f26;
    --color-bg-tertiary: #242930;

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0aec0;
    --color-text-muted: #718096;

    --color-border-light: #2d3748;
    --color-border-medium: #4a5568;
}

/* 系統暗色模式支援 */
@media (prefers-color-scheme: dark) {
    :root:not(.light-theme) {
        --color-bg-primary: #0f1419;
        --color-bg-secondary: #1a1f26;
        --color-bg-tertiary: #242930;

        --color-text-primary: #ffffff;
        --color-text-secondary: #a0aec0;
        --color-text-muted: #718096;

        --color-border-light: #2d3748;
        --color-border-medium: #4a5568;
    }
}

/* 主題切換按鈕 */
.theme-toggle {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 1.2rem;
}

.theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-soft);
    border-color: var(--color-accent-primary);
}

/* 域名徽章 */
.domain-badge {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 2px;
    font-weight: 400;
}

.logo-link:hover .domain-badge {
    color: var(--color-accent-primary);
}

/* 響應式調整 */
@media (max-width: 768px) {
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .domain-badge {
        display: none;
    }

    /* 隱藏桌面導航 */
    .nav-links {
        display: none;
    }

    /* 移動設備菜單按鈕 */
    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--color-text-primary);
        cursor: pointer;
        padding: var(--spacing-xs);
    }
}

/* 移動設備菜單 */
.mobile-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--spacing-md);
    box-shadow: 0 4px 20px var(--shadow-soft);
    z-index: 99;
}

.mobile-menu-item {
    display: block;
    padding: var(--spacing-sm) 0;
    text-decoration: none;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border-light);
    transition: var(--transition-fast);
}

.mobile-menu-item:hover {
    color: var(--color-accent-primary);
    padding-left: var(--spacing-sm);
}

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

/* 顯示移動設備菜單 */
.mobile-menu.active {
    display: block;
    animation: slideDown 0.3s ease-out;
}

/* 暗色模式移動設備菜單 */
.dark-theme .mobile-menu,
:root.dark-theme .mobile-menu {
    background: var(--color-bg-secondary);
    border-bottom-color: var(--color-border-medium);
}

.dark-theme .mobile-menu-item,
:root.dark-theme .mobile-menu-item {
    color: var(--color-text-primary);
    border-bottom-color: var(--color-border-medium);
}

.dark-theme .mobile-menu-item:hover,
:root.dark-theme .mobile-menu-item:hover {
    color: var(--color-accent-primary);
}

/* 小型設備調整 */
@media (max-width: 480px) {
    .navbar {
        padding: var(--spacing-xs) 0;
    }

    .logo-text {
        font-size: 1rem;
    }

    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .mobile-menu-btn {
        font-size: 1.25rem;
        padding: var(--spacing-xs);
    }

    .mobile-menu {
        padding: var(--spacing-sm);
    }

    .mobile-menu-item {
        padding: var(--spacing-xs) 0;
    }
}

/* 暗色模式導航欄調整 */
.dark-theme .navbar,
:root.dark-theme .navbar {
    background: rgba(15, 20, 25, 0.95);
    border-bottom-color: var(--color-border-light);
}

.dark-theme .theme-toggle,
:root.dark-theme .theme-toggle {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-medium);
}

.dark-theme .nav-item,
:root.dark-theme .nav-item {
    color: var(--color-text-secondary);
}

.dark-theme .nav-item:hover,
:root.dark-theme .nav-item:hover {
    color: var(--color-accent-primary);
}

/* 動畫效果 */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-down {
    animation: slideDown 0.3s ease-out forwards;
}

/* 工具類補充 */
.ml-auto { margin-left: auto; }
.text-bold { font-weight: 700; }