/* Professional Document Creator - Modern UI Design */

/* CSS Custom Properties for Consistent Theming */
:root {
    --primary-color: #3B82F6;
    --primary-dark: #1E40AF;
    --secondary-color: #6B7280;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-overlay: rgba(0, 0, 0, 0.05);
    
    --border-color: #E5E7EB;
    --border-hover: #D1D5DB;
    --border-focus: #3B82F6;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --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;
    
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

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

*::before,
*::after {
    box-sizing: border-box;
}

html {
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
}

.logo i {
    font-size: var(--font-size-2xl);
    opacity: 0.9;
}

.logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: -0.025em;
}

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

.nav-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.25);
    box-shadow: var(--shadow-sm);
}

.nav-btn i {
    font-size: var(--font-size-sm);
}

/* Main Content */
.main {
    min-height: calc(100vh - 160px);
}

.section {
    display: none;
}

.section.active {
    display: block;
}

/* Home Section Styles */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: var(--radius-xl);
    margin: var(--spacing-2xl) 0;
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    pointer-events: none;
}

.hero-content {
    padding: var(--spacing-2xl) var(--spacing-2xl);
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.hero p {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
    margin-top: var(--spacing-2xl);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: center;
}

.stat i {
    font-size: var(--font-size-3xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.stat span {
    font-weight: 600;
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

/* Features Grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.feature-card {
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: var(--font-size-3xl);
    color: white;
}

.feature-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

/* Template Showcase */
.template-showcase {
    margin: var(--spacing-2xl) 0;
    text-align: center;
}

.template-showcase h3 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    font-weight: 700;
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.template-preview-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.template-preview-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.template-preview {
    width: 100%;
    height: 120px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.template-preview.classic {
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
}

.template-preview.modern {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.template-preview.minimal {
    background: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 100%);
    border: 2px solid var(--border-color);
}

.template-preview.corporate {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.template-preview.creative {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.template-preview-card h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

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

/* Document Builder Layout */
.document-builder {
    padding: var(--spacing-2xl) 0;
}

.builder-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.builder-header h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.builder-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.builder-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    min-height: 800px;
}

/* Form Styles */
.builder-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-height: 800px;
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

.builder-form::-webkit-scrollbar {
    width: 6px;
}

.builder-form::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.builder-form::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: var(--radius-sm);
}

.builder-form::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.form-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

.form-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.form-card h3 i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: var(--border-hover);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

/* Template Selector */
.template-selector {
    margin-bottom: var(--spacing-lg);
}

.template-selector label {
    display: block;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--text-primary);
}

.template-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-sm);
}

.template-option {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.template-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.template-option.active {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

.template-thumb {
    width: 40px;
    height: 24px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
}

.template-thumb.classic { background: linear-gradient(135deg, #1f2937, #374151); }
.template-thumb.modern { background: linear-gradient(135deg, #3b82f6, #1e40af); }
.template-thumb.minimal { background: linear-gradient(135deg, #f9fafb, #e5e7eb); border: 1px solid var(--border-color); }
.template-thumb.corporate { background: linear-gradient(135deg, #059669, #047857); }
.template-thumb.creative { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

.template-option span {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
}

/* Color Selector */
.color-selector {
    margin-bottom: var(--spacing-lg);
}

.color-selector label {
    display: block;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--text-primary);
}

.color-options {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.color-option {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.color-option:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.color-option.active {
    border-color: var(--text-primary);
    box-shadow: var(--shadow-lg);
}

.color-option.active::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Items Container */
.items-container {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    margin-bottom: var(--spacing-md);
}

.item-row {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.item-inputs {
    display: grid;
    grid-template-columns: 2fr 80px 100px 100px 40px;
    gap: var(--spacing-sm);
    align-items: center;
}

.item-inputs input {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.item-amount {
    font-weight: 600;
    color: var(--text-primary);
    text-align: right;
    font-size: var(--font-size-sm);
}

.remove-item {
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-item:hover {
    background: #dc2626;
    transform: scale(1.1);
}

.add-item {
    width: 100%;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    min-height: 44px;
    user-select: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn i {
    font-size: var(--font-size-sm);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.form-actions .btn {
    flex: 1;
    min-width: 140px;
}

/* Preview Styles */
.builder-preview {
    position: sticky;
    top: 140px;
    height: fit-content;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.preview-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.preview-header h3 i {
    color: var(--primary-color);
}

.preview-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.preview-zoom {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preview-zoom:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.preview-zoom.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.preview-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    max-height: 700px;
    overflow-y: auto;
}

.preview-container::-webkit-scrollbar {
    width: 6px;
}

.preview-container::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.preview-container::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: var(--radius-sm);
}

.preview-document {
    background: white;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    min-height: 600px;
    transform-origin: top left;
    transition: transform var(--transition-normal);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.footer .container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

.footer a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .builder-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .builder-preview {
        position: static;
    }
    
    .hero h2 {
        font-size: var(--font-size-3xl);
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .template-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .header .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav {
        width: 100%;
        justify-content: center;
    }
    
    .nav-btn {
        flex: 1;
        justify-content: center;
        padding: var(--spacing-sm);
    }
    
    .hero-content {
        padding: var(--spacing-xl);
    }
    
    .hero h2 {
        font-size: var(--font-size-2xl);
    }
    
    .hero p {
        font-size: var(--font-size-base);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-card {
        padding: var(--spacing-xl);
    }
    
    .builder-header h2 {
        font-size: var(--font-size-2xl);
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .item-inputs {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .item-inputs .item-amount {
        text-align: left;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        flex: none;
    }
    
    .template-options {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .template-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: var(--font-size-lg);
    }
    
    .nav-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .nav-btn span {
        display: none;
    }
    
    .hero h2 {
        font-size: var(--font-size-xl);
    }
    
    .builder-header h2 {
        font-size: var(--font-size-xl);
    }
    
    .template-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .template-grid {
        grid-template-columns: 1fr;
    }
}

/* Animation Classes */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Focus States for Accessibility */
.btn:focus,
.nav-btn:focus,
.template-option:focus,
.color-option:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
        --bg-secondary: #ffffff;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}