@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* CSS Custom Properties for Design System */
:root {
    --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Dark Theme (Default) */
    --bg-base: #080710;
    --bg-surface: rgba(255, 255, 255, 0.05);
    --bg-surface-hover: rgba(255, 255, 255, 0.09);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-hover: rgba(255, 255, 255, 0.2);
    
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
    --accent-glow: 0 8px 32px 0 rgba(99, 102, 241, 0.2);
    
    --primary-color: #6366f1;
    --secondary-color: #a855f7;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.3);
    
    --glass-blur: 16px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    --ad-bg: rgba(255, 255, 255, 0.02);
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-base: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.7);
    --bg-surface-hover: rgba(255, 255, 255, 0.95);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-color-hover: rgba(0, 0, 0, 0.15);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
    --accent-glow: 0 8px 32px 0 rgba(59, 130, 246, 0.15);
    
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --ad-bg: rgba(0, 0, 0, 0.02);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    position: relative;
}

/* Cosmic Background Decorative Blobs */
body::before, body::after {
    content: '';
    position: absolute;
    width: 35vw;
    height: 35vw;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.15;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

body::before {
    top: -10%;
    left: -10%;
    background: var(--primary-color);
}

body::after {
    bottom: 10%;
    right: -10%;
    background: var(--secondary-color);
}

[data-theme="light"]::before, [data-theme="light"]::after {
    opacity: 0.08;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Glassmorphism Styles */
.glass-panel {
    background: var(--bg-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.glass-panel:hover {
    border-color: var(--border-color-hover);
    background: var(--bg-surface-hover);
}

/* Header styling */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border var(--transition-normal);
}

header.scrolled {
    background: var(--bg-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.9;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary-gradient);
    color: #fff;
    -webkit-text-fill-color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
    box-shadow: var(--accent-glow);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding: 6px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-normal);
    border-radius: 2px;
}

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

.actions-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Toggle */
.theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-color-hover);
    transform: scale(1.05);
}

.theme-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.theme-btn .sun {
    display: none;
}

[data-theme="light"] .theme-btn .moon {
    display: none;
}

[data-theme="light"] .theme-btn .sun {
    display: block;
}

/* Menu Toggle Button for Mobile */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 80px 0 40px 0;
    text-align: center;
    position: relative;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero h1 span {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    font-family: var(--font-primary);
    border: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--accent-glow);
}

.btn-primary:hover {
    opacity: 0.95;
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(99, 102, 241, 0.35);
}

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

.btn-secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
}

/* Grid layout for Dashboard */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.tool-card {
    padding: 32px;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--bg-surface-hover);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: all var(--transition-fast);
}

.tool-card:hover .tool-icon {
    background: var(--primary-gradient);
    color: #fff;
    border-color: transparent;
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--accent-glow);
}

.tool-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    flex-grow: 1;
    margin-bottom: 20px;
}

.tool-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 20px;
    text-transform: uppercase;
}

.badge-new {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-soon {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Tool Detail Page Layout */
.tool-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    margin-top: 40px;
}

.tool-content {
    flex: 1;
    min-width: 280px;
}

.tool-sidebar {
    /* MẶC ĐỊNH ẨN KHI CHƯA DUYỆT QUẢNG CÁO:
       Để trống thanh bên sẽ tạo khoảng trống thừa mất thẩm mỹ.
       Đổi thành 'block' khi bạn chèn mã quảng cáo thật vào. */
    display: none; 
    width: 300px;
    flex-shrink: 0;
}

@media (max-width: 992px) {
    .tool-sidebar {
        width: 100%;
    }
}

/* Dropzone styling */
.dropzone-container {
    padding: 40px;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    background: rgba(255, 255, 255, 0.01);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.dropzone-container:hover, .dropzone-container.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.dropzone-icon {
    font-size: 3rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

/* Tool Actions & Settings */
.tool-settings {
    margin-top: 32px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.settings-row {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: center;
}

.settings-col {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

select, input[type="range"] {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-primary);
    outline: none;
    transition: all var(--transition-fast);
}

select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Image preview section */
.file-list {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.02);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.file-preview-thumb {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    object-fit: cover;
    background: #333;
}

.file-meta h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
    word-break: break-all;
}

.file-meta span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-status {
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 12px;
}

.status-pending {
    background: var(--border-color);
    color: var(--text-secondary);
}

.status-processing {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
}

.status-done {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.btn-remove {
    background: none;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    padding: 8px;
    font-size: 1.1rem;
    border-radius: 50%;
    transition: background-color var(--transition-fast);
}

.btn-remove:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Rich SEO Text Content */
.seo-section {
    margin-top: 80px;
    border-top: 1px solid var(--border-color);
    padding-top: 60px;
}

.seo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

@media (max-width: 768px) {
    .seo-grid {
        grid-template-columns: 1fr;
    }
}

.seo-card h2 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.seo-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.seo-card ul {
    list-style-position: inside;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* FAQ Accordion Styling */
.faq-section {
    margin-bottom: 80px;
}

.faq-section h2 {
    font-size: 2.25rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 40px;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-surface);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    outline: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--primary-color);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-question::after {
    content: '-';
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out, padding var(--transition-normal) ease-out;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.faq-item.active .faq-answer {
    max-height: 500px; /* arbitrary height to slide down */
    padding: 0 24px 24px 24px;
}

/* AdSense Ad Unit Placeholders */
.ad-slot {
    /* MẶC ĐỊNH ẨN TRONG GIAI ĐOẠN XÉT DUYỆT ADSENSE:
       Tránh việc Google từ chối duyệt web vì lỗi "giao diện dở dang/chờ quảng cáo".
       Khi được duyệt thành công, đổi 'display: none' thành 'display: flex' */
    display: none;
    background: var(--ad-bg);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    position: relative;
    overflow: hidden;
    margin: 24px 0;
}

.ad-slot::before {
    content: 'Advertisement';
    position: absolute;
    top: 4px;
    left: 8px;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ad-leaderboard {
    width: 100%;
    min-height: 90px;
    max-height: 120px;
}

.ad-sidebar {
    width: 100%;
    height: 600px;
    position: sticky;
    top: 96px;
}

.ad-inline {
    width: 100%;
    min-height: 250px;
}


/* Footer Styling */
footer {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 40px 0;
    background: rgba(0, 0, 0, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-col:first-child {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-col:first-child {
        grid-column: span 1;
    }
}

.footer-col h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-col p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Static Information Pages layout (About, Contact, Privacy, Terms) */
.page-layout {
    max-width: 800px;
    margin: 40px auto 80px auto;
}

.page-layout h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-layout h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 32px 0 16px 0;
}

.page-layout p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.page-layout ul, .page-layout ol {
    margin-bottom: 20px;
    padding-left: 20px;
    color: var(--text-secondary);
}

.page-layout li {
    margin-bottom: 8px;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-family: var(--font-primary);
    outline: none;
    transition: all var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary-color);
    background: var(--bg-surface-hover);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Mobile Responsive Menu adjustments */
@media (max-width: 768px) {
    .nav-menu {
        display: none; /* JS will toggle class 'active' */
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        height: calc(100vh - 72px);
        background: var(--bg-base);
        flex-direction: column;
        justify-content: center;
        gap: 40px;
        font-size: 1.5rem;
        z-index: 99;
        transition: all var(--transition-normal);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
}

/* Tab Layout System */
.tab-container {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
    gap: 8px;
}

.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--text-primary);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 3px 3px 0 0;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* JSON Utility Workspace */
.json-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .json-workspace {
        grid-template-columns: 1fr;
    }
}

.monospace-textarea {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    background: var(--bg-base);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    width: 100%;
    height: 450px;
    resize: vertical;
    outline: none;
    transition: border-color var(--transition-fast);
}

.monospace-textarea:focus {
    border-color: var(--primary-color);
}

.json-output-container {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-base);
    height: 450px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.json-output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.json-output-pre {
    flex-grow: 1;
    overflow: auto;
    padding: 16px;
    margin: 0;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-primary);
}

.json-error-banner {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    color: var(--error-color);
    padding: 12px 16px;
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* QR Code & Scanner Styles */
.qr-workspace {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    max-width: 500px;
    margin: 0 auto;
}

.qr-result-box {
    text-align: center;
    margin-top: 20px;
    padding: 24px;
    width: 100%;
}

.qr-result-image {
    padding: 16px;
    background: white;
    border-radius: var(--radius-sm);
    display: inline-block;
    box-shadow: var(--shadow-md);
    margin-bottom: 16px;
}

.qr-result-image canvas, .qr-result-image img {
    display: block;
    max-width: 100%;
}

/* Scanner viewport wrapper */
#reader {
    width: 100%;
    max-width: 450px;
    background: black;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin: 0 auto;
}

/* Custom list items for merging ordering */
.sortable-item {
    cursor: grab;
}

.sortable-item:active {
    cursor: grabbing;
    background: var(--bg-surface-hover);
    border-color: var(--primary-color);
}