/* Contour Maker - Clean Design with Subtle Animations */

:root {
    /* ── Fonts ── */
    --font-display: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* ── Type Scale ── */
    --text-xs: 0.65rem;
    --text-sm: 0.75rem;
    --text-base: 0.85rem;
    --text-md: 0.95rem;
    --text-lg: 1.1rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.6rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3rem;

    /* ── Line Heights ── */
    --leading-tight: 1.1;
    --leading-normal: 1.6;
    --leading-relaxed: 1.7;

    /* ── Spacing (4px base) ── */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;

    /* ── Light Theme Colors ── */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;
    --color-bg-hover: #f1f5f9;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-primary-darker: #1e40af;
    --color-primary-light: #eff6ff;
    --color-primary-lighter: #dbeafe;

    --color-success: #10b981;
    --color-success-dark: #059669;
    --color-success-text: #166534;
    --color-success-light: #dcfce7;
    --color-success-lighter: #bbf7d0;
    --color-success-bg: #f0fdf4;

    --color-error: #ef4444;
    --color-error-dark: #dc2626;
    --color-error-light: #fef2f2;
    --color-error-border: #fecaca;
    --color-error-lighter: #fee2e2;

    --color-warning: #f59e0b;
    --color-warning-dark: #b45309;
    --color-warning-darker: #92400e;
    --color-warning-light: #fef3c7;
    --color-warning-lighter: #fde68a;

    --color-info-light: #e0f2fe;
    --color-info-lighter: #bae6fd;
    --color-info-dark: #0284c7;

    /* Wizard column colors */
    --color-col-x-bg: #dcfce7;
    --color-col-x-text: #166534;
    --color-col-x-cell: #f0fdf4;
    --color-col-y-bg: #fef3c7;
    --color-col-y-text: #92400e;
    --color-col-y-cell: #fffbeb;
    --color-col-z-bg: #ede9fe;
    --color-col-z-text: #5b21b6;
    --color-col-z-cell: #f5f3ff;

    /* Status badge colors */
    --color-status-processing: #1e40af;
    --color-status-success: #16a34a;

    /* PayPal */
    --color-paypal: #0070ba;
    --color-paypal-dark: #005ea6;

    /* ── Dark Theme (Landing) ── */
    --dark-bg: #0a1628;
    --dark-surface: rgba(30, 58, 95, 0.4);
    --dark-surface-hover: rgba(30, 58, 95, 0.6);
    --dark-border: rgba(59, 130, 246, 0.2);
    --dark-border-hover: rgba(59, 130, 246, 0.4);
    --dark-text: #fff;
    --dark-text-secondary: rgba(255, 255, 255, 0.8);
    --dark-text-muted: rgba(255, 255, 255, 0.6);
    --dark-text-faint: rgba(255, 255, 255, 0.4);
    --dark-text-faintest: rgba(255, 255, 255, 0.3);
    --dark-accent: #60a5fa;
    --dark-accent-hover: #7dd3fc;
    --dark-footer-border: rgba(59, 130, 246, 0.15);

    /* ── Gradients ── */
    --gradient-cta: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    --gradient-dark-card: linear-gradient(135deg, rgba(30, 58, 95, 0.4) 0%, rgba(15, 30, 50, 0.4) 100%);
    --gradient-dark-card-hover: linear-gradient(135deg, rgba(30, 58, 95, 0.6) 0%, rgba(15, 30, 50, 0.6) 100%);

    /* ── Border Radius ── */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;

    /* ── Shadows ── */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --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 12px 40px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-primary: 0 4px 12px rgba(59, 130, 246, 0.3);
    --shadow-success: 0 4px 12px rgba(16, 185, 129, 0.3);

    /* ── Transitions ── */
    --duration-fast: 0.15s;
    --duration-normal: 0.2s;
    --duration-slow: 0.3s;
    --ease-default: ease;
    --transition-all: all var(--duration-normal) var(--ease-default);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-12px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

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

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

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

html {
    font-size: 15px;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: var(--leading-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-6);
    height: 60px;
    display: flex;
    align-items: center;
    animation: fadeIn 0.4s var(--ease-default);
}

.nav-inner {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 12px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-lg);
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-all);
}

.nav-brand:hover {
    color: var(--color-primary);
}

.brand-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

/* Main */
.main {
    flex: 1;
    padding: 48px 24px;
}

.tool-page .main {
    padding-top: 32px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Hero */
.hero {
    text-align: center;
    margin-bottom: var(--space-10);
    animation: fadeInUp 0.5s var(--ease-default);
}

.hero.hero-compact {
    text-align: left;
    margin-bottom: var(--space-6);
}

.hero.hero-compact h1 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-1);
}

.hero.hero-compact p {
    font-size: var(--text-base);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.hero p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr minmax(280px, 340px);
    gap: var(--space-6);
    align-items: start;
}

/* Panels */
.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--duration-slow) var(--ease-default);
}

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

.panel-main {
    padding: 24px;
    animation: fadeInUp 0.5s ease 0.1s both;
}

.panel-side {
    padding: 24px;
    animation: fadeInUp 0.5s ease 0.2s both;
    position: sticky;
    top: 24px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 24px;
}

#fileInput {
    display: none;
}

.upload-area {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-10) var(--space-6);
    cursor: pointer;
    transition: all var(--duration-slow) var(--ease-default);
    background: linear-gradient(135deg, #fafbfc 0%, var(--color-bg) 100%);
}

.upload-area:hover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-lighter) 100%);
}

.upload-area:hover .upload-icon {
    transform: translateY(-4px);
    color: var(--color-primary);
}

.upload-area.dragover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-lighter) 100%);
    transform: scale(1.01);
}

.upload-content {
    text-align: center;
}

.upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    color: var(--color-text-secondary);
    transition: all var(--duration-slow) var(--ease-default);
}

.upload-icon svg {
    width: 100%;
    height: 100%;
}

.upload-title {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 12px;
}

.upload-formats {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
}

.format-tag {
    padding: var(--space-1) 10px;
    background: var(--color-primary);
    color: var(--dark-text);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: transform var(--duration-normal) var(--ease-default);
}

.upload-area:hover .format-tag {
    transform: scale(1.05);
}

.upload-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* File Info */
.file-info {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    background: var(--color-bg);
    animation: fadeInUp 0.3s var(--ease-default);
}

.file-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.file-icon {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-text);
    flex-shrink: 0;
}

.file-icon svg {
    width: 20px;
    height: 20px;
}

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

.file-name {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.btn-remove {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    transition: var(--transition-all);
}

.btn-remove:hover {
    background: var(--color-error-light);
    color: var(--color-error);
    transform: scale(1.1);
}

.btn-remove svg {
    width: 18px;
    height: 18px;
}

.file-preview-text {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    overflow-x: auto;
    color: var(--color-text-secondary);
}

/* Column Mapping Wizard */
.column-wizard {
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-lighter) 100%);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-lg);
}

.file-info .column-wizard svg {
    width: 18px !important;
    height: 18px !important;
    min-width: 18px;
    min-height: 18px;
    max-width: 18px;
    max-height: 18px;
    flex-shrink: 0;
}

.wizard-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.wizard-header svg {
    width: 18px !important;
    height: 18px !important;
    min-width: 18px;
    min-height: 18px;
    max-width: 18px;
    max-height: 18px;
    flex-shrink: 0;
    color: var(--color-primary);
}

.wizard-hint {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.wizard-table-container {
    overflow-x: auto;
    margin-bottom: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-primary-lighter);
}

.wizard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    background: var(--color-surface);
}

.wizard-table th,
.wizard-table td {
    padding: 8px 12px;
    text-align: left;
    border-bottom: 1px solid var(--color-primary-light);
    white-space: nowrap;
}

.wizard-table th {
    background: var(--color-primary-light);
    font-weight: 600;
    color: var(--color-primary-dark);
    position: relative;
}

.wizard-table th.col-x {
    background: var(--color-col-x-bg);
    color: var(--color-col-x-text);
}

.wizard-table th.col-y {
    background: var(--color-col-y-bg);
    color: var(--color-col-y-text);
}

.wizard-table th.col-z {
    background: var(--color-col-z-bg);
    color: var(--color-col-z-text);
}

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

.wizard-table td.col-x {
    background: var(--color-col-x-cell);
}

.wizard-table td.col-y {
    background: var(--color-col-y-cell);
}

.wizard-table td.col-z {
    background: var(--color-col-z-cell);
}

.wizard-table tr:last-child td {
    border-bottom: none;
}

.wizard-selectors {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 12px;
}

.wizard-select-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.wizard-select-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.wizard-select-group select {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: border-color var(--duration-normal), box-shadow var(--duration-normal);
}

.wizard-select-group select:focus {
    outline: none;
    border-color: var(--color-primary-dark);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.wizard-options {
    display: flex;
    align-items: center;
    gap: 16px;
}

.wizard-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.wizard-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

@media (max-width: 600px) {
    .wizard-selectors {
        grid-template-columns: 1fr;
    }
}

/* Parameters */
.params-section {
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
}

.param-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.param-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.param-group label svg {
    width: 16px;
    height: 16px;
    color: var(--color-primary);
}

.input-wrap {
    display: flex;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-all);
    background: var(--color-surface);
}

.input-wrap:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-wrap input {
    flex: 1;
    padding: 10px 12px;
    border: none;
    font-size: 0.95rem;
    background: transparent;
    outline: none;
    min-width: 0;
}

.input-unit {
    padding: 10px 14px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    border-left: 1px solid var(--color-border);
}

/* Generate Button */
.btn-generate {
    width: 100%;
    padding: 14px var(--space-6);
    background: var(--color-primary);
    color: var(--dark-text);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
}

.btn-generate::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-generate:hover:not(:disabled)::before {
    left: 100%;
}

.btn-generate:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.btn-generate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-label svg {
    width: 18px;
    height: 18px;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Progress */
.progress-section {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    animation: fadeIn 0.3s var(--ease-default);
}

.progress-track {
    height: 6px;
    background: var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--space-3);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    background-size: 200% 100%;
    width: 0%;
    transition: width 0.4s ease;
    animation: shimmer 2s linear infinite;
}

.progress-status {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-align: center;
}

.queue-status {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 8px;
    animation: pulse 2s ease-in-out infinite;
}

/* Results */
.results-section {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 0.4s var(--ease-default);
}

.results-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.results-header svg {
    width: 20px;
    height: 20px;
    color: var(--color-success);
}

.results-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-success);
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-bottom: 24px;
}

.stat {
    text-align: center;
    padding: 14px var(--space-2);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: transform var(--duration-normal) var(--ease-default);
}

.stat:hover {
    transform: translateY(-2px);
}

.stat-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 2px;
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px var(--space-6);
    background: var(--color-success);
    color: var(--dark-text);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-md);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-all);
}

.btn-download:hover {
    background: var(--color-success-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-success);
}

.btn-download svg {
    width: 20px;
    height: 20px;
    animation: float 2s ease-in-out infinite;
}

/* Preview Canvas */
.preview-container {
    margin-bottom: var(--space-5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.preview-controls {
    display: flex;
    gap: 6px;
}

.preview-btn {
    width: 28px;
    height: 28px;
    padding: var(--space-1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--duration-fast) var(--ease-default);
}

.preview-btn:hover {
    background: var(--color-bg-hover);
    color: var(--color-text);
    border-color: var(--color-border-hover);
}

.preview-btn svg {
    width: 100%;
    height: 100%;
}

.preview-canvas {
    display: block;
    width: 100%;
    height: min(500px, 50vh);
    cursor: grab;
    background: var(--color-bg);
}

.preview-canvas:active {
    cursor: grabbing;
}

/* Fullscreen Preview (native Fullscreen API) */
.preview-container.fullscreen {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    margin: 0;
    border: none;
    border-radius: 0;
    background: var(--color-text);
}

.preview-container.fullscreen .preview-header {
    flex-shrink: 0;
    background: rgba(30, 41, 59, 0.95);
    border-bottom: 1px solid var(--dark-border);
    color: var(--color-border);
    padding: var(--space-3) var(--space-5);
}

.preview-container.fullscreen .preview-btn {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--dark-border);
    color: var(--color-border);
}

.preview-container.fullscreen .preview-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--dark-text);
}

.preview-container.fullscreen .preview-canvas {
    flex: 1;
    min-height: 0;
    width: 100%;
    background: var(--color-text);
}

/* Exit fullscreen icon */
.preview-container.fullscreen #fullscreenBtn svg {
    transform: rotate(180deg);
}

.preview-canvas:active {
    cursor: grabbing;
}

/* Error */
.error-section {
    margin-top: var(--space-6);
    padding: var(--space-5);
    background: var(--color-error-light);
    border: 1px solid var(--color-error-border);
    border-radius: var(--radius-lg);
    animation: fadeIn 0.3s var(--ease-default);
}

.error-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--color-error);
}

.error-header svg {
    width: 20px;
    height: 20px;
}

.error-text {
    font-size: 0.9rem;
    color: var(--color-error);
    margin-bottom: 16px;
}

.btn-retry {
    padding: 10px var(--space-5);
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-all);
}

.btn-retry:hover {
    background: var(--color-bg);
    border-color: var(--color-text-secondary);
}

/* Info Blocks */
.info-block {
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}

.info-block:last-child {
    padding-bottom: 0;
    margin-bottom: 0;
    border-bottom: none;
}

.info-block h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.info-block h3 svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
}

.info-text {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.steps {
    list-style: none;
    counter-reset: step;
}

.steps li {
    counter-increment: step;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    padding-left: 32px;
    position: relative;
    margin-bottom: 12px;
    transition: transform 0.2s ease;
}

.steps li:hover {
    transform: translateX(4px);
}

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

.steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 22px;
    height: 22px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}

.code-sample {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    overflow-x: auto;
    color: var(--color-text-secondary);
}

/* Task History */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-toggle-history {
    display: block;
    width: 100%;
    padding: 6px 0;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary);
    background: none;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-all);
}

.btn-toggle-history:hover {
    background: var(--color-primary-lighter);
    border-color: var(--color-primary);
}

.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    transition: var(--transition-all);
}

.task-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.task-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.task-filename {
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.task-time {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.task-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-badge {
    padding: var(--space-1) 10px;
    border-radius: var(--radius-2xl);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-completed { background: var(--color-success-light); color: var(--color-success-text); }
.status-processing { background: var(--color-primary-lighter); color: var(--color-status-processing); animation: pulse 1.5s ease-in-out infinite; }
.status-queued { background: var(--color-warning-light); color: var(--color-warning-darker); }
.status-failed { background: var(--color-error-light); color: var(--color-error); }
.status-cancelled { background: var(--color-bg); color: var(--color-text-muted); }

.btn-small {
    padding: 5px var(--space-3);
    font-size: 0.7rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition-all);
}

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

.btn-small.btn-cancel {
    color: var(--color-error);
    border-color: var(--color-error-border);
}

.btn-small.btn-cancel:hover {
    background: var(--color-error-light);
}

.btn-small.btn-delete {
    color: var(--color-text-secondary);
    border-color: transparent;
    padding: 4px 6px;
    min-width: auto;
    font-size: 0.75rem;
}

.btn-small.btn-delete:hover {
    color: var(--color-error);
    background: var(--color-error-light);
}

/* Footer */
.footer {
    padding: 20px 24px;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.footer-sep {
    margin: 0 8px;
}

/* ========================================
   Landing Page - Apple Style Hero
   ======================================== */

.landing-page {
    background: var(--dark-bg);
}

.hero-landing {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* Video Background */
.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    opacity: 0;
    filter: saturate(1.2) contrast(1.1);
    transition: opacity 1s ease-in-out;
    /* Prevent interaction and download */
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

.hero-video[src] {
    opacity: 0.35;
}

/* Video overlay for better text readability */
.hero-video-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 100% 100% at 50% 50%,
        transparent 0%,
        rgba(10, 22, 40, 0.4) 50%,
        rgba(10, 22, 40, 0.7) 100%);
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(30, 64, 175, 0.5) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(59, 130, 246, 0.4) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 50% 80%, rgba(14, 165, 233, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

/* Animated flowing light waves */
.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    z-index: 2;
    background:
        linear-gradient(90deg,
            transparent 0%,
            rgba(59, 130, 246, 0.03) 20%,
            rgba(59, 130, 246, 0.06) 40%,
            rgba(147, 197, 253, 0.1) 50%,
            rgba(59, 130, 246, 0.06) 60%,
            rgba(59, 130, 246, 0.03) 80%,
            transparent 100%);
    animation: lightWave 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes lightWave {
    0%, 100% { transform: translateX(-25%) skewX(-15deg); }
    50% { transform: translateX(25%) skewX(-15deg); }
}

/* Primary glow - top right arc */
.hero-glow {
    position: absolute;
    top: -30%;
    right: -20%;
    width: 90%;
    height: 90%;
    z-index: 3;
    background:
        radial-gradient(ellipse at 70% 30%,
            rgba(96, 165, 250, 0.25) 0%,
            rgba(59, 130, 246, 0.12) 30%,
            rgba(37, 99, 235, 0.06) 50%,
            transparent 70%);
    filter: blur(40px);
    animation: glowFloat 10s ease-in-out infinite;
    pointer-events: none;
}

/* Secondary glow - bottom left */
.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 60%;
    height: 60%;
    z-index: 3;
    background:
        radial-gradient(ellipse at center,
            rgba(14, 165, 233, 0.2) 0%,
            rgba(6, 182, 212, 0.1) 40%,
            transparent 70%);
    filter: blur(60px);
    animation: glowFloat 12s ease-in-out infinite reverse;
    pointer-events: none;
}

@keyframes glowFloat {
    0%, 100% {
        opacity: 0.8;
        transform: translate(0, 0) scale(1);
    }
    25% {
        opacity: 1;
        transform: translate(2%, -2%) scale(1.05);
    }
    50% {
        opacity: 0.9;
        transform: translate(0, 2%) scale(1.02);
    }
    75% {
        opacity: 1;
        transform: translate(-2%, 0) scale(1.08);
    }
}

/* Subtle noise texture overlay */
.hero-gradient::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 24px 40px;
    max-width: 960px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 700;
    color: var(--dark-text);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-5);
    line-height: var(--leading-tight);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--dark-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: 28px;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.hero-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--dark-text);
    text-decoration: none;
    font-size: var(--text-lg);
    font-weight: 500;
    transition: all var(--duration-slow) var(--ease-default);
}

.hero-link svg {
    width: 18px;
    height: 18px;
    transition: transform var(--duration-slow) var(--ease-default);
}

.hero-link:hover {
    color: var(--dark-accent-hover);
}

.hero-link:hover svg {
    transform: translateX(4px);
}

/* Hero Feature Cards - integrated into hero section */
.hero-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
    max-width: 900px;
}

.hero-feature-card {
    text-align: center;
    padding: var(--space-6) var(--space-5);
    background: var(--gradient-dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    transition: all var(--duration-slow) var(--ease-default);
}

.hero-feature-card:hover {
    background: var(--gradient-dark-card-hover);
    border-color: var(--dark-border-hover);
    transform: translateY(-4px);
}

.hero-feature-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 14px;
    color: var(--dark-accent);
}

.hero-feature-icon svg {
    width: 100%;
    height: 100%;
}

.hero-feature-card h3 {
    font-family: var(--font-display);
    font-size: var(--text-md);
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: var(--space-2);
}

.hero-feature-card p {
    font-size: 0.8rem;
    color: var(--dark-text-muted);
    line-height: 1.5;
}

/* Features Section */
.features-section {
    background: var(--dark-bg);
    padding: 100px var(--space-6);
}

.features-container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: var(--space-10) 30px;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.5) 0%, rgba(15, 30, 50, 0.5) 100%);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-2xl);
    transition: all 0.4s var(--ease-default);
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.7) 0%, rgba(15, 30, 50, 0.7) 100%);
    border-color: var(--dark-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px rgba(59, 130, 246, 0.1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 24px;
    color: #3b82f6;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: var(--space-3);
}

.feature-card p {
    font-size: var(--text-md);
    color: var(--dark-text-muted);
    line-height: var(--leading-normal);
}

/* Landing Footer */
.footer-landing {
    background: var(--dark-bg);
    border-top: 1px solid var(--dark-footer-border);
    padding: var(--space-6);
}

.footer-landing .footer-inner {
    color: var(--dark-text-faint);
}

.footer-landing .footer-links {
    margin-bottom: var(--space-2);
}

.footer-landing .footer-links a {
    color: var(--dark-text-faint);
    text-decoration: none;
}

.footer-landing .footer-links a:hover {
    color: var(--dark-text-secondary);
}

.footer-landing .footer-sep {
    color: var(--dark-text-faintest);
}

.footer-landing .footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.footer-landing .footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.footer-landing .footer-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.footer .footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.footer .footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.footer .lang-switch,
.footer-landing .lang-switch {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-1);
    padding: 6px 10px;
    border-radius: var(--radius-full);
}

.footer .lang-switch {
    border: 1px solid var(--color-border);
    background: var(--color-bg-hover);
}

.footer-landing .lang-switch {
    border: 1px solid var(--dark-border);
    background: rgba(15, 30, 50, 0.55);
}

.footer .lang-globe,
.footer-landing .lang-globe {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
}

.footer .lang-globe {
    color: var(--color-primary);
}

.footer-landing .lang-globe {
    color: var(--dark-accent);
}

.footer .lang-switch-label,
.footer-landing .lang-switch-label {
    font-size: var(--text-sm);
}

.footer .lang-switch-label {
    color: var(--color-text-secondary);
}

.footer-landing .lang-switch-label {
    color: var(--dark-text-muted);
}

.footer .lang-btn,
.footer-landing .lang-btn {
    border: 1px solid transparent;
    background: transparent;
    border-radius: var(--radius-full);
    padding: 4px 10px;
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition-all);
}

.footer .lang-btn {
    color: var(--color-text-secondary);
}

.footer-landing .lang-btn {
    color: var(--dark-text-secondary);
}

.footer .lang-btn:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

.footer-landing .lang-btn:hover {
    border-color: var(--dark-border-hover);
    color: var(--dark-text);
}

.footer .lang-btn.active {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}

.footer-landing .lang-btn.active {
    background: var(--dark-accent);
    color: #0a1628;
    border-color: var(--dark-accent);
}

/* Landing Navigation */
.nav-landing {
    background: transparent;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
}

.nav-landing .nav-brand {
    color: var(--dark-text);
}

.nav-landing .brand-icon {
    color: var(--dark-accent);
}

.nav-landing .nav-link {
    color: rgba(255,255,255,0.7);
}

.nav-landing .nav-link:hover {
    color: var(--dark-text);
}

/* ========================================
   Tool Page Navigation
   ======================================== */

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-left: auto;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--duration-normal);
}

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

.nav .lang-switch,
.nav-landing .lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    flex: 0 0 auto;
    white-space: nowrap;
}

.nav .lang-switch {
    border: 1px solid var(--color-border);
    background: var(--color-bg-hover);
}

.nav-landing .lang-switch {
    border: 1px solid var(--dark-border);
    background: rgba(15, 30, 50, 0.5);
}

.nav .lang-globe,
.nav-landing .lang-globe {
    width: 10px;
    height: 10px;
    flex: 0 0 auto;
    display: block;
}

.nav .lang-globe {
    color: var(--color-primary);
}

.nav-landing .lang-globe {
    color: var(--dark-accent);
}

.nav .lang-switch-label,
.nav-landing .lang-switch-label {
    display: none;
}

.nav .lang-switch-label {
    color: var(--color-text-secondary);
}

.nav-landing .lang-switch-label {
    color: var(--dark-text-muted);
}

.nav .lang-btn,
.nav-landing .lang-btn {
    border: 1px solid transparent;
    background: transparent;
    border-radius: var(--radius-full);
    padding: 2px 6px;
    font-size: 0.68rem;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition-all);
}

.nav .lang-btn {
    color: var(--color-text-secondary);
}

.nav-landing .lang-btn {
    color: var(--dark-text-secondary);
}

.nav .lang-btn:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

.nav-landing .lang-btn:hover {
    border-color: var(--dark-border-hover);
    color: var(--dark-text);
}

.nav .lang-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

.nav-landing .lang-btn.active {
    background: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #0a1628;
}

/* ========================================
   Examples Page
   ======================================== */

.examples-main {
    padding-top: 60px;
    padding-bottom: 80px;
}

.examples-hero {
    text-align: center;
    margin-bottom: 60px;
}

.examples-hero h1 {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-3);
}

.examples-hero p {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 80px;
}

.example-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--duration-slow) var(--ease-default);
}

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

.example-image {
    height: 180px;
    background: var(--gradient-cta);
    display: flex;
    align-items: center;
    justify-content: center;
}

.example-placeholder {
    width: 80px;
    height: 80px;
    color: var(--dark-text-faint);
}

.example-placeholder svg {
    width: 100%;
    height: 100%;
}

.example-content {
    padding: 24px;
}

.example-content h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.example-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.example-stats {
    display: flex;
    gap: 20px;
}

.example-stat {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.example-stat strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* Technology Section */
.tech-section {
    margin-bottom: 80px;
}

.tech-section h2 {
    text-align: center;
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-12);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.tech-step {
    text-align: center;
    padding: var(--space-8) var(--space-5);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--duration-slow) var(--ease-default);
}

.tech-step:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.1);
}

.tech-number {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--space-4);
    background: var(--gradient-cta);
    color: var(--dark-text);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    font-weight: 700;
}

.tech-step h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.tech-step p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 60px var(--space-10);
    background: var(--gradient-cta);
    border-radius: var(--radius-2xl);
}

.cta-section h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: var(--space-3);
}

.cta-section p {
    font-size: var(--text-lg);
    color: var(--dark-text-secondary);
    margin-bottom: var(--space-8);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    background: var(--dark-text);
    color: var(--color-primary-darker);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--duration-slow) var(--ease-default);
}

.cta-button svg {
    width: 20px;
    height: 20px;
    transition: transform var(--duration-slow) var(--ease-default);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.cta-button:hover svg {
    transform: translateX(4px);
}

/* ========================================
   Responsive - Landing & Examples
   ======================================== */

@media (max-width: 1024px) {
    .main {
        padding: 40px 20px;
    }

    .nav {
        padding: 0 var(--space-5);
    }

    .nav-links {
        gap: 16px;
    }

    .nav-link {
        font-size: 0.85rem;
    }

    .nav .lang-switch,
    .nav-landing .lang-switch {
        margin-left: 6px;
        padding: 2px 5px;
    }

    .hero-content {
        max-width: 820px;
        padding: 24px 28px;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .examples-main {
        padding-top: 48px;
        padding-bottom: 64px;
    }

    .examples-grid {
        gap: 24px;
    }
}

@media (max-width: 820px) {
    .nav {
        height: auto;
        min-height: 60px;
        padding: var(--space-2) var(--space-4);
    }

    .nav-inner {
        flex-wrap: wrap;
        row-gap: 10px;
        column-gap: 10px;
    }

    .nav-links {
        width: 100%;
        order: 3;
        margin-left: 0;
        gap: 12px;
        flex-wrap: wrap;
    }

    .nav .lang-switch,
    .nav-landing .lang-switch {
        order: 2;
        margin-left: auto;
    }

    .nav-landing {
        position: sticky;
        background: rgba(10, 22, 40, 0.82);
        border-bottom-color: rgba(148, 163, 184, 0.35);
        backdrop-filter: blur(10px);
    }
}

@media (max-width: 900px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

    .features-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .examples-grid {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .hero-landing {
        align-items: center;
        padding-top: 26px;
        padding-bottom: 34px;
    }

    .hero-title {
        font-size: 1.75rem;
        line-height: 1.15;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .hero-actions {
        flex-direction: column;
        gap: 16px;
    }

    .hero-features-grid {
        margin-top: 32px;
    }

    .hero-content {
        padding: 18px 16px;
        margin-top: 0;
    }

    .hero.hero-compact {
        margin-bottom: var(--space-5);
    }

    .hero.hero-compact h1 {
        font-size: 1.45rem;
        line-height: 1.3;
    }

    .hero.hero-compact p {
        font-size: 0.9rem;
        line-height: 1.55;
    }

    .nav {
        height: auto;
        min-height: 0;
        padding: 10px 12px;
    }

    .nav-inner {
        flex-wrap: wrap;
        row-gap: 10px;
    }

    .nav-brand {
        width: 100%;
        justify-content: center;
        font-size: 0.98rem;
        gap: 8px;
    }

    .nav-brand .brand-icon {
        width: 20px;
        height: 20px;
    }

    .nav-links {
        width: 100%;
        order: 2;
        gap: 8px;
        margin-left: 0;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .nav-link {
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        min-height: 34px;
        padding: 6px 4px;
        border-radius: var(--radius-md);
        background: rgba(148, 163, 184, 0.12);
        line-height: 1.2;
        word-break: keep-all;
    }

    .nav .lang-switch,
    .nav-landing .lang-switch {
        order: 3;
        margin-left: 0;
        width: 100%;
        justify-content: center;
        padding: 2px 6px;
        gap: 3px;
    }

    .nav .lang-globe,
    .nav-landing .lang-globe {
        width: 8px;
        height: 8px;
    }

    .nav .lang-btn,
    .nav-landing .lang-btn {
        padding: 2px 5px;
        font-size: 0.62rem;
    }

    .footer .footer-links,
    .footer-landing .footer-links {
        gap: var(--space-2);
    }

    .footer .footer-links .footer-sep,
    .footer-landing .footer-links .footer-sep,
    .footer-landing .footer-meta .footer-sep {
        display: none;
    }

    .footer-landing .footer-meta {
        flex-direction: column;
        gap: var(--space-1);
    }

    .footer .lang-switch,
    .footer-landing .lang-switch {
        width: 100%;
        max-width: 240px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .cta-section {
        padding: 40px 24px;
    }
}

@media (max-width: 420px) {
    .hero-title {
        font-size: 1.55rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .nav-links {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .nav-link {
        font-size: 0.8rem;
    }
}

/* ========================================
   Custom Modal Dialog
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s var(--ease-default);
}

.modal-dialog {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.3s var(--ease-default);
}

.modal-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-icon svg {
    width: 32px;
    height: 32px;
}

.modal-icon.modal-icon-warning {
    background: linear-gradient(135deg, var(--color-warning-light) 0%, var(--color-warning-lighter) 100%);
}

.modal-icon.modal-icon-warning svg {
    stroke: var(--color-warning-dark);
}

.modal-icon.modal-icon-error {
    background: linear-gradient(135deg, var(--color-error-lighter) 0%, var(--color-error-border) 100%);
}

.modal-icon.modal-icon-error svg {
    stroke: var(--color-error-dark);
}

.modal-icon.modal-icon-success {
    background: linear-gradient(135deg, var(--color-success-light) 0%, var(--color-success-lighter) 100%);
}

.modal-icon.modal-icon-success svg {
    stroke: var(--color-status-success);
}

.modal-icon.modal-icon-info {
    background: linear-gradient(135deg, var(--color-info-light) 0%, var(--color-info-lighter) 100%);
}

.modal-icon.modal-icon-info svg {
    stroke: var(--color-info-dark);
}

.modal-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--space-3) 0;
}

.modal-message {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0 0 24px 0;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.modal-btn {
    padding: 10px var(--space-6);
    border-radius: var(--radius-md);
    font-size: var(--text-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-all);
    border: none;
}

.modal-btn-primary {
    background: var(--color-primary);
    color: var(--dark-text);
}

.modal-btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

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

.modal-btn-secondary:hover {
    background: var(--color-border);
}

/* ========================================
   Responsive - Tool Page
   ======================================== */

/* Responsive */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .panel-main {
        order: -1;
    }

    .panel-side {
        position: static;
    }
}

@media (max-width: 600px) {
    html {
        font-size: 14px;
    }

    .main {
        padding: 32px 16px;
    }

    .hero {
        margin-bottom: 32px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .panel-main {
        padding: 20px;
    }

    .param-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .upload-area {
        padding: 32px 16px;
    }

    .preview-canvas {
        height: min(300px, 40vh);
    }
}

/* ========================================
   Statistics Section (Right Panel - Above Payment)
   ======================================== */

.stats-section {
    padding: var(--space-5);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-primary);
    margin-bottom: var(--space-5);
    animation: fadeInUp 0.4s var(--ease-default);
}

.stats-section h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin: 0 0 16px 0;
}

.stats-section h3 svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    padding: 10px var(--space-3);
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-primary-lighter);
}

.stat-item .stat-label {
    font-size: 0.75rem;
    color: var(--color-primary-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.stat-item .stat-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    font-family: var(--font-mono);
}

/* ========================================
   Payment Section (Right Panel)
   ======================================== */

.payment-section {
    padding: var(--space-5);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-warning);
    margin-bottom: var(--space-5);
}

.payment-section h3 {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-md);
    font-weight: 600;
    color: var(--color-warning-darker);
    margin: 0 0 var(--space-4) 0;
}

.payment-section h3 svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-warning);
}

.payment-info {
    text-align: center;
    margin-bottom: 16px;
}

.payment-price {
    margin-bottom: 8px;
}

.price-value {
    font-size: var(--text-2xl);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-warning-dark);
}

.payment-note {
    font-size: var(--text-base);
    color: var(--color-warning-darker);
    margin: 0;
}

#paypal-button-container {
    min-height: 45px;
    margin-bottom: 12px;
}

.payment-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--color-success-light);
    border-radius: var(--radius-md);
    color: var(--color-success-text);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.payment-status svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-status-success);
}

.payment-section .btn-download {
    width: 100%;
    margin: 0;
}

/* Demo Pay Button */
.demo-pay-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--color-paypal);
    color: var(--dark-text);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--duration-normal);
}

.demo-pay-btn:hover {
    background: var(--color-paypal-dark);
}

.demo-pay-btn svg {
    width: 20px;
    height: 20px;
}

.demo-note {
    font-size: var(--text-sm);
    color: var(--color-warning-darker);
    text-align: center;
    margin: var(--space-2) 0 0 0;
}

.provider-pay-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.provider-pay-btn {
    width: 100%;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--duration-fast), opacity var(--duration-normal);
}

.provider-pay-btn:hover {
    transform: translateY(-1px);
    opacity: 0.95;
}

.provider-paddle {
    background: #0f172a;
    color: #ffffff;
}

.provider-creem {
    background: #0ea5a4;
    color: #ffffff;
}

.provider-alipay {
    background: #1677ff;
    color: #ffffff;
}

.provider-secondary {
    background: #334155;
    color: #ffffff;
}

.provider-verify {
    background: #16a34a;
    color: #ffffff;
}

/* ========================================
   Responsive - Supplemental
   ======================================== */

@media (max-width: 1024px) {
    .panel-main,
    .panel-side {
        padding: 20px;
    }

    .results-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .preview-canvas {
        height: min(440px, 46vh);
    }
}

@media (max-width: 820px) {
    .results-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .preview-header {
        flex-wrap: wrap;
        row-gap: 8px;
    }

    .task-item {
        flex-wrap: wrap;
        align-items: flex-start;
        gap: 8px;
    }

    .task-status {
        width: 100%;
        justify-content: flex-end;
    }

    .example-stats {
        flex-wrap: wrap;
        gap: 12px;
    }
}

@media (max-width: 600px) {
    .results-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 6px;
    }

    .stat {
        padding: 10px 6px;
    }

    .stat-value {
        font-size: 0.95rem;
    }

    .stat-label {
        font-size: 0.64rem;
        letter-spacing: 0.3px;
    }

    .preview-header {
        padding: 10px 12px;
    }

    .preview-controls {
        margin-left: auto;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .payment-status {
        align-items: flex-start;
        justify-content: flex-start;
        text-align: left;
    }

    .demo-pay-btn,
    .provider-pay-btn {
        font-size: 0.92rem;
    }

    .examples-main {
        padding-top: 40px;
        padding-bottom: 56px;
    }

    .example-content {
        padding: 20px 18px;
    }

    .cta-section {
        border-radius: var(--radius-xl);
    }
}

@media (max-width: 420px) {
    .results-stats {
        grid-template-columns: 1fr;
    }

    .hero-link {
        width: 100%;
        justify-content: center;
    }
}