/* EZUSEAI - Modern AI Tools Platform Styles */

/* 基本樣式重置 */
:root {
    /* 顏色系統 */
    --color-primary-50: #f8f7ff;
    --color-primary-100: #e6e3ff;
    --color-primary-200: #beb4ef;
    --color-primary-300: #a594ea;
    --color-primary-400: #8c76e0;
    --color-primary-500: #7c63d8;
    --color-primary-600: #623bc8;
    --color-primary-700: #4a2c9a;
    --color-primary-800: #371f76;
    --color-primary-900: #241050;
    
    --color-background: #0a0616;
    --color-surface: #1a1335;
    --color-surface-elevated: #25194a;
    --color-text: #ffffff;
    --color-text-muted: #a1a1aa;
    
    /* 漸層 */
    --gradient-primary: linear-gradient(135deg, #8c76e0 0%, #623bc8 50%, #4a2c9a 100%);
    --gradient-surface: linear-gradient(145deg, rgba(26, 19, 53, 0.8) 0%, rgba(37, 25, 74, 0.9) 100%);
    --gradient-glow: linear-gradient(135deg, rgba(140, 118, 224, 0.3) 0%, rgba(98, 59, 200, 0.2) 100%);
    
    /* 陰影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 24px rgba(140, 118, 224, 0.5);
    
    /* 字體 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* 邊距 */
    --border-radius: 0.75rem;
    --border-radius-lg: 1rem;
    
    /* 動畫 */
    --transition: all 0.3s cubic-bezier(0, 0, 0.2, 1);
}

/* 基本重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
}

body.loaded {
    opacity: 1;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 隱藏類 */
.hidden {
    display: none !important;
}

/* Header */
.header {
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(98, 59, 200, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(26, 19, 53, 0.95);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--color-primary-100);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--color-primary-200);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    background: var(--gradient-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

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

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(140, 118, 224, 0.1) 0%, transparent 70%);
    transform: translateX(-50%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    line-height: 1.5;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 32px rgba(140, 118, 224, 0.6);
}

.button-arrow {
    transition: transform 0.3s ease;
}

.cta-button:hover .button-arrow {
    transform: translateX(4px);
}

/* Section 基礎樣式 */
.tools-section,
.categories-section,
.about-section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-primary-100);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.tool-card {
    background: var(--gradient-surface);
    border: 1px solid rgba(98, 59, 200, 0.2);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition);
}

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

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(98, 59, 200, 0.4);
}

.tool-card-inner {
    position: relative;
    z-index: 1;
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.tool-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-primary-100);
}

.tool-description {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.tool-category {
    font-size: var(--font-size-sm);
    color: var(--color-primary-300);
    background: rgba(98, 59, 200, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    display: inline-block;
    margin-bottom: 1rem;
}

.tool-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.tool-status.active .status-indicator {
    background: #10b981;
    box-shadow: 0 0 6px rgba(16, 185, 129, 0.5);
}

.tool-status.coming-soon .status-indicator {
    background: #f59e0b;
    box-shadow: 0 0 6px rgba(245, 158, 11, 0.5);
}

.featured-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--color-surface);
    border: 1px solid rgba(98, 59, 200, 0.2);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-2px);
    border-color: rgba(98, 59, 200, 0.4);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.category-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary-200);
}

.category-count {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* About Section */
.about-section {
    background: rgba(26, 19, 53, 0.3);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid rgba(98, 59, 200, 0.2);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-primary-200);
}

.feature-desc {
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid rgba(98, 59, 200, 0.2);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-desc {
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

.copyright {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 6, 22, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner.hidden {
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(98, 59, 200, 0.3);
    border-top: 3px solid var(--color-primary-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 動畫 */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-6px); }
}

/* 響應式設計 */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}