/* UI/UX Pro Max Design System - Minimalism & Swiss Style */
/* Typography: Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables */
:root {
    --primary: #0066FF;
    --primary-hover: #0052CC;
    --cta: #00C853;
    --cta-hover: #00A843;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border: #E0E0E0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
    --radius: 4px;
    --radius-lg: 8px;
    --spacing: 8px;
    --touch-target: 44px;
    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 1.5);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
}

.logo svg {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: calc(var(--spacing) * 4);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: calc(var(--spacing) * 1) 0;
    cursor: pointer;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--primary);
}

.nav-link.active {
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary);
}

.nav-link:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 4px;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--spacing) * 3);
    min-height: calc(100vh - 200px);
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: calc(var(--spacing) * 8) calc(var(--spacing) * 2);
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing) * 2);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.gradient-text {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: calc(var(--spacing) * 6);
}

/* Search Container */
.search-container {
    max-width: 700px;
    margin: 0 auto calc(var(--spacing) * 4);
    position: relative;
}

.search-box {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
    gap: calc(var(--spacing) * 2);
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.search-icon {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.125rem;
    color: var(--text-primary);
    background: transparent;
    font-family: inherit;
    min-height: var(--touch-target);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-btn {
    background: var(--cta);
    color: white;
    border: none;
    padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 3);
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 1);
    transition: var(--transition);
    font-family: inherit;
    min-height: var(--touch-target);
}

.search-btn:hover {
    background: var(--cta-hover);
}

.search-btn:focus-visible {
    outline: 2px solid var(--cta);
    outline-offset: 2px;
}

/* Suggestions */
.suggestions {
    position: absolute;
    top: calc(100% + calc(var(--spacing) * 1));
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    max-height: 300px;
    overflow-y: auto;
    display: none;
    z-index: 50;
}

.suggestions.active {
    display: block;
}

.suggestion-item {
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
    min-height: var(--touch-target);
    display: flex;
    align-items: center;
}

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

.suggestion-item:hover,
.suggestion-item:focus {
    background: var(--bg-secondary);
}

/* Hot Keywords */
.hot-keywords {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: calc(var(--spacing) * 2);
    flex-wrap: wrap;
}

.hot-label {
    color: var(--text-secondary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 1);
}

.hot-label svg {
    color: var(--primary);
}

.hot-list {
    display: flex;
    gap: calc(var(--spacing) * 1.5);
    flex-wrap: wrap;
}

.hot-tag {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
    border-radius: calc(var(--radius) * 5);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border);
    cursor: pointer;
    min-height: var(--touch-target);
    display: inline-flex;
    align-items: center;
}

.hot-tag:hover,
.hot-tag:focus {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.hot-tag:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing) * 3);
    margin-top: calc(var(--spacing) * 6);
}

.feature-card {
    background: var(--bg-primary);
    padding: calc(var(--spacing) * 4) calc(var(--spacing) * 3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    margin: 0 auto calc(var(--spacing) * 2);
    color: var(--primary);
    display: flex;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: calc(var(--spacing) * 1);
    color: var(--text-primary);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Result Page */
.back-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 2);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing) * 1);
    min-height: var(--touch-target);
    margin-bottom: calc(var(--spacing) * 2);
}

.back-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.back-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.back-btn svg {
    flex-shrink: 0;
}

.result-header {
    background: var(--bg-primary);
    padding: calc(var(--spacing) * 3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-bottom: calc(var(--spacing) * 3);
}

.search-box-small {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2);
}

.search-box-small .search-input {
    flex: 1;
    padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
}

.search-btn-small {
    background: var(--primary);
    color: white;
    border: none;
    padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 3);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    min-height: var(--touch-target);
}

.search-btn-small:hover {
    background: var(--primary-hover);
}

/* Result Info */
.result-info {
    background: var(--bg-primary);
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-bottom: calc(var(--spacing) * 3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: calc(var(--spacing) * 2);
}

.result-filters {
    display: flex;
    gap: calc(var(--spacing) * 1);
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--text-primary);
    font-weight: 500;
    min-height: var(--touch-target);
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Loading */
.loading {
    text-align: center;
    padding: calc(var(--spacing) * 8) 0;
    display: none;
}

.loading.active {
    display: block;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto calc(var(--spacing) * 2);
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Result List */
.result-list {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing) * 2);
}

.result-item {
    background: var(--bg-primary);
    padding: calc(var(--spacing) * 3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    display: flex;
    gap: calc(var(--spacing) * 2);
    transition: var(--transition);
    cursor: pointer;
}

.result-item:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.file-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
    color: var(--primary);
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-info h3 {
    font-size: 1.125rem;
    margin-bottom: calc(var(--spacing) * 1);
    color: var(--text-primary);
    font-weight: 600;
}

.file-info h3 mark,
.file-path mark {
    background: #FFF3CD;
    color: #856404;
    padding: 2px 4px;
    border-radius: 2px;
}

.file-path {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: calc(var(--spacing) * 1.5);
    word-break: break-all;
}

.file-meta {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2);
    flex-wrap: wrap;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn-view {
    background: var(--primary);
    color: white;
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
    border-radius: var(--radius);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    min-height: var(--touch-target);
    display: inline-flex;
    align-items: center;
}

.btn-view:hover {
    background: var(--primary-hover);
}

.share-pwd {
    background: var(--bg-secondary);
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
    border-radius: var(--radius);
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing) * 1);
    margin-top: calc(var(--spacing) * 4);
    flex-wrap: wrap;
}

.page-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    min-height: var(--touch-target);
    min-width: var(--touch-target);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.page-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: calc(var(--spacing) * 8) calc(var(--spacing) * 2);
    display: none;
}

.empty-state.active {
    display: block;
}

.empty-state h3 {
    margin: calc(var(--spacing) * 2) 0 calc(var(--spacing) * 1);
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
}

.empty-state p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    margin-top: calc(var(--spacing) * 8);
    padding: calc(var(--spacing) * 4);
    border-top: 1px solid var(--border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    flex-wrap: wrap;
    gap: calc(var(--spacing) * 2);
}

.footer-links {
    display: flex;
    gap: calc(var(--spacing) * 3);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .nav-content {
        flex-direction: column;
        gap: calc(var(--spacing) * 2);
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
        justify-content: center;
    }
    
    .result-item {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}


/* 转存弹窗样式 */
.conversion-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.conversion-modal.active {
    opacity: 1;
    visibility: visible;
}

.conversion-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 48px 40px;
    text-align: center;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.conversion-modal.active .conversion-content {
    transform: scale(1);
}

.conversion-status {
    width: 60px;
    height: 60px;
    margin: 0 auto 24px;
    position: relative;
}

.conversion-status svg {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.conversion-status.loading .spinner {
    opacity: 1;
}

.conversion-status.success .checkmark {
    opacity: 1;
}

.conversion-status.error .error-icon {
    opacity: 1;
}

/* 加载动画 */
.spinner {
    animation: rotate 2s linear infinite;
}

.spinner .path {
    stroke: #6366F1;
    stroke-linecap: round;
    animation: dash 1.5s ease-in-out infinite;
}

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

@keyframes dash {
    0% {
        stroke-dasharray: 1, 150;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -35;
    }
    100% {
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -124;
    }
}

/* 成功动画 */
.checkmark-circle {
    stroke: #10B981;
    stroke-width: 2;
    stroke-miterlimit: 10;
    animation: fill 0.4s ease-in-out 0.4s forwards, scale 0.3s ease-in-out 0.9s both;
}

.checkmark-check {
    stroke: #10B981;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.8s forwards;
}

@keyframes stroke {
    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes scale {
    0%, 100% {
        transform: none;
    }
    50% {
        transform: scale3d(1.1, 1.1, 1);
    }
}

@keyframes fill {
    100% {
        box-shadow: inset 0 0 0 30px #10B981;
    }
}

/* 错误动画 */
.error-circle {
    stroke: #EF4444;
    stroke-width: 2;
    stroke-miterlimit: 10;
    animation: fill-error 0.4s ease-in-out 0.4s forwards, scale 0.3s ease-in-out 0.9s both;
}

.error-cross {
    stroke: #EF4444;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 54;
    stroke-dashoffset: 54;
    animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.8s forwards;
}

@keyframes fill-error {
    100% {
        box-shadow: inset 0 0 0 30px #EF4444;
    }
}

.conversion-message {
    font-size: 18px;
    font-weight: 600;
    color: #1F2937;
    margin: 0 0 12px;
}

.conversion-countdown {
    font-size: 14px;
    color: #6B7280;
    margin: 0;
}