/* ========================================
   ToolBox Pro - 主样式表
   ======================================== */

/* CSS Variables */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --secondary: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #9ca3af;
    
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --sidebar-width: 260px;
    --sidebar-collapsed: 64px;
    --header-height: 64px;
    
    --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 24px;
}

.sidebar-toggle {
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar.collapsed .logo span,
.sidebar.collapsed .search-box,
.sidebar.collapsed .nav-title,
.sidebar.collapsed .nav-list span,
.sidebar.collapsed .friend-links {
    display: none;
}

.search-box {
    padding: 12px 16px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 26px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 14px;
}

.search-box input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    font-size: 13px;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-light);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 2px;
}

.nav-section {
    margin-bottom: 8px;
}

.nav-title {
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-list {
    list-style: none;
}

.nav-list li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-list li a:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.nav-list li a.active {
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 500;
}

.nav-list li a i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

/* Friend Links in Sidebar */
.friend-links {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
}

.friend-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white !important;
    border-radius: var(--radius);
    font-size: 13px;
    transition: var(--transition);
}

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

.friend-link i {
    font-size: 14px;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: var(--transition);
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed);
}

/* Top Header */
.top-header {
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-left .subtitle {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

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

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

/* Page Content */
.page-content {
    flex: 1;
    padding: 24px;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 32px;
    color: white;
    text-align: center;
}

.hero-content h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.hero-content p {
    font-size: 16px;
    opacity: 0.9;
}

/* Section Title */
.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.section-title i {
    color: var(--primary);
}

/* Tools Section */
.tools-section {
    margin-bottom: 40px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.tool-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.tool-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    flex-shrink: 0;
}

.bg-blue { background: linear-gradient(135deg, #3b82f6, #06b6d4); }
.bg-green { background: linear-gradient(135deg, #10b981, #34d399); }
.bg-purple { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.bg-orange { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.bg-cyan { background: linear-gradient(135deg, #06b6d4, #22d3ee); }
.bg-pink { background: linear-gradient(135deg, #ec4899, #f472b6); }
.bg-red { background: linear-gradient(135deg, #ef4444, #f87171); }
.bg-indigo { background: linear-gradient(135deg, #4f46e5, #818cf8); }

.tool-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tool-info p {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* Friend Section */
.friend-section {
    margin-bottom: 40px;
}

.friend-card {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.friend-card:hover {
    box-shadow: var(--shadow-md);
}

.friend-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
    flex-shrink: 0;
}

.friend-content {
    flex: 1;
}

.friend-content h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.friend-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

/* Category Section */
.category-section {
    margin-bottom: 40px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.category-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
}

.category-card:hover {
    box-shadow: var(--shadow);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.category-header i {
    font-size: 20px;
}

.text-blue { color: #3b82f6; }
.text-green { color: #10b981; }
.text-purple { color: #8b5cf6; }
.text-orange { color: #f59e0b; }
.text-pink { color: #ec4899; }
.text-cyan { color: #06b6d4; }
.text-indigo { color: #4f46e5; }

.category-header h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.category-list {
    list-style: none;
}

.category-list li {
    margin-bottom: 8px;
}

.category-list li:last-child {
    margin-bottom: 0;
}

.category-list a {
    display: block;
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 13px;
    transition: var(--transition);
}

.category-list a:hover {
    color: var(--primary);
    padding-left: 8px;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 24px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    margin: 0 12px;
    font-size: 14px;
}

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

.copyright {
    font-size: 13px;
    color: var(--text-tertiary);
}

.copyright a {
    color: var(--primary);
}

/* ========================================
   Tool Page Styles
   ======================================== */

.tool-container {
    max-width: 1000px;
    margin: 0 auto;
}

.tool-header {
    margin-bottom: 24px;
}

.tool-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tool-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.tool-box {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
}

.tool-section {
    margin-bottom: 20px;
}

.tool-section:last-child {
    margin-bottom: 0;
}

.tool-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tool-input,
.tool-textarea,
.tool-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.tool-input:focus,
.tool-textarea:focus,
.tool-select:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.tool-textarea {
    min-height: 200px;
    resize: vertical;
    font-family: "Consolas", "Monaco", monospace;
}

.tool-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.tool-result {
    margin-top: 20px;
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.tool-result-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.tool-result-content {
    font-family: "Consolas", "Monaco", monospace;
    font-size: 13px;
    word-break: break-all;
    color: var(--text-primary);
}

/* Options Group */
.options-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.option-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.option-item label {
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Convert Row */
.convert-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.convert-row .tool-input {
    flex: 1;
}

.convert-swap {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.convert-swap:hover {
    background: var(--primary);
    color: white;
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload:hover,
.file-upload.dragover {
    border-color: var(--primary-light);
    background: rgba(79, 70, 229, 0.02);
}

.file-upload i {
    font-size: 48px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.file-upload p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.file-upload .file-hint {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* QR Code Container */
.qr-container {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.qr-input {
    flex: 1;
    min-width: 300px;
}

.qr-output {
    width: 256px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#qrcode {
    width: 200px;
    height: 200px;
    margin-bottom: 16px;
    padding: 16px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

/* Color Picker */
.color-picker-wrapper {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 16px;
}

.color-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.color-input-group input[type="color"] {
    width: 48px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
}

.color-preview {
    width: 100%;
    height: 100px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-top: 16px;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar.collapsed ~ .main-content {
        margin-left: 0;
    }
    
    .overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }
    
    .overlay.show {
        display: block;
    }
}

@media (max-width: 768px) {
    .page-content {
        padding: 16px;
    }
    
    .hero-section {
        padding: 24px;
    }
    
    .hero-content h2 {
        font-size: 22px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .friend-card {
        flex-direction: column;
        text-align: center;
    }
    
    .friend-logo {
        margin: 0 auto;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .convert-row {
        flex-direction: column;
    }
    
    .convert-swap {
        transform: rotate(90deg);
    }
    
    .qr-container {
        flex-direction: column;
        align-items: center;
    }
    
    .qr-input {
        width: 100%;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

.hidden { display: none !important; }

/* Loading Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Copy Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gray-800);
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Code Block */
pre {
    background: var(--gray-800);
    color: var(--gray-100);
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 13px;
    line-height: 1.6;
}

code {
    font-family: "Consolas", "Monaco", monospace;
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 16px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

td {
    color: var(--text-secondary);
}