/* Modern CSS with 2025 Design Trends */
:root {
    /* Color System - Bold minimalism with premium feel */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #667eea;
    --accent-hover: #5a67d8;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --border-color: #e2e8f0;
    
    /* Shadows - Enhanced depth */
    --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-glow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    
    /* Typography - Modern font system */
    --font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", 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;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Borders & Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

/* Dark Theme Variables */
html[data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --card-bg: rgba(30, 41, 59, 0.95);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
}

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

html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

/* Container */
.generator-container {
    width: 100%;
    max-width: 600px;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header - Enhanced typography */
.gen-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-xl);
    background: var(--card-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.header-content h3.main-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

/* Theme Toggle - Micro-interaction */
.theme-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.theme-toggle:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.1) rotate(10deg);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Progress Container - Modern progress indicator */
.progress-container {
    margin-bottom: var(--space-xl);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    width: 25%;
}

/* Steps Indicator - Enhanced with icons and labels */
.steps-indicator {
    display: flex;
    justify-content: space-between;
    gap: var(--space-md);
}

.step-bubble {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm);
    border-radius: var(--radius-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    flex: 1;
    min-width: 0;
}

.step-bubble:hover {
    background: rgba(102, 126, 234, 0.05);
    transform: translateY(-2px);
}

.step-bubble.active {
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.step-icon {
    font-size: var(--font-size-lg);
    display: block;
}

.step-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

.step-bubble.active .step-label {
    color: var(--accent-color);
}

/* Steps - Smooth transitions */
.step {
    display: none;
    animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step.active {
    display: block;
}

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

/* Modern Cards */
.modern-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

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

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.card-actions {
    display: flex;
    gap: var(--space-sm);
}

/* Form Elements - Enhanced with focus states */
.form-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-input {
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: var(--shadow-glow);
    background: rgba(255, 255, 255, 1);
    transform: translateY(-1px);
}

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

/* Enhanced Table */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-lg);
}

.modern-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.modern-table th {
    background: rgba(102, 126, 234, 0.05);
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.modern-table td {
    padding: var(--space-sm);
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table-input {
    border: none;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    background: transparent;
    font-size: var(--font-size-sm);
}

.table-input:focus {
    background: rgba(102, 126, 234, 0.05);
    transform: none;
}

/* Buttons - Modern with micro-interactions */
.btn-primary,
.btn-secondary,
.btn-add-item,
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: rgba(102, 126, 234, 0.05);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-add-item {
    background: var(--success-color);
    color: white;
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
}

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

.btn-icon {
    background: none;
    border: none;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
}

.btn-icon:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.1);
}

.btn-remove {
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    transition: all 0.3s ease;
}

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

/* Totals Section */
.totals-section {
    background: rgba(102, 126, 234, 0.02);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.totals-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
}

.totals-row:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.total-final {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--accent-color);
    margin-top: var(--space-sm);
    padding-top: var(--space-md);
    border-top: 2px solid var(--accent-color) !important;
}

.totals-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.totals-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Preview Section */
.preview-content {
    background: white;
    color: #000;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    min-height: 400px;
    font-family: var(--font-family);
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    gap: var(--space-md);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Navigation */
.wizard-footer {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .generator-container {
        max-width: 100%;
        padding: 0;
    }
    
    .gen-header {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .header-content h3.main-title {
        font-size: var(--font-size-xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .steps-indicator {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    .step-bubble {
        flex: 1 1 calc(50% - var(--space-sm));
        min-width: calc(50% - var(--space-sm));
    }
    
    .step-label {
        font-size: 0.7rem;
    }
    
    .wizard-footer {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    body {
        padding: var(--space-md);
    }
    
    .modern-card {
        padding: var(--space-lg);
    }
    
    .header-content h3.main-title {
        font-size: var(--font-size-lg);
    }
    
    .table-container {
        font-size: var(--font-size-xs);
    }
    
    .modern-table th,
    .modern-table td {
        padding: var(--space-xs);
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus indicators for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}
/* Preview Actions - Button Group */
.preview-actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.btn-print {
    background: var(--success-color);
    color: white;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-print:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-print:active {
    transform: translateY(0);
}

/* Responsive adjustments for preview actions */
@media (max-width: 480px) {
    .preview-actions {
        flex-direction: column;
        width: 100%;
        gap: var(--space-md);
    }
    
    .btn-print,
    .btn-download {
        width: 100%;
        justify-content: center;
    }
}
/* Progress Bar */
.progress-container {
    margin-bottom: var(--space-xl, 2rem);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border-color, #e2e8f0);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: var(--accent-color, #635bff);
    border-radius: 3px;
    transition: width 0.4s ease;
    width: 25%;
}

/* Enhanced Step Bubbles */
.steps-indicator {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.step-bubble {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem;
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    cursor: pointer;
    flex: 1;
    min-width: 0;
    background: var(--card-bg, rgba(255, 255, 255, 0.75));
}

.step-bubble:hover {
    background: rgba(99, 91, 255, 0.05);
    transform: translateY(-2px);
}

.step-bubble.active {
    background: rgba(99, 91, 255, 0.1);
    transform: translateY(-2px);
}

.step-icon {
    font-size: 1.125rem;
    display: block;
}

.step-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-color, #1a1a1a);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

/* Preview Actions */
.preview-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-print,
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-print {
    background: #10b981;
    color: white;
}

.btn-print:hover {
    background: #059669;
    transform: translateY(-2px);
}

.btn-download {
    background: var(--accent-color, #635bff);
    color: white;
}

.btn-download:hover {
    background: #574fdb;
    transform: translateY(-2px);
}

/* Enhanced Form Elements */
.modern-card {
    background: var(--card-bg, rgba(255, 255, 255, 0.75));
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.form-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-input {
    padding: 0.75rem;
    border: 2px solid transparent;
    border-radius: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-color, #1a1a1a);
    transition: all 0.3s ease;
    width: 100%;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color, #635bff);
    background: rgba(255, 255, 255, 1);
}

/* Totals Section */
.totals-section {
    background: rgba(99, 91, 255, 0.02);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid rgba(99, 91, 255, 0.1);
    margin-top: 1rem;
}

.totals-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.totals-row:not(:last-child) {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.total-final {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--accent-color, #635bff);
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 2px solid var(--accent-color, #635bff) !important;
}

/* Responsive */
@media (max-width: 480px) {
    .preview-actions {
        flex-direction: column;
        width: 100%;
        gap: 0.75rem;
    }
    
    .btn-print,
    .btn-download {
        width: 100%;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}