/* ============================================
   CleanVault - Privacy-First PDF Tools
   Modern SaaS Style Design
   ============================================ */

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

:root {
    --color-navy: #1e3a5f;
    --color-navy-dark: #152a45;
    --color-white: #ffffff;
    --color-gray-light: #f8fafc;
    --color-gray: #64748b;
    --color-gray-dark: #334155;
    --color-green: #4ade80;
    --color-green-dark: #22c55e;
    --color-error: #ef4444;
    --color-success: #10b981;
    --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);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-gray-dark);
    background-color: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid #e2e8f0;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

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

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-navy);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--color-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav a:hover {
    color: var(--color-navy);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    color: var(--color-white);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 16px;
    opacity: 0.95;
}

.hero-tagline {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-green);
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--color-green);
    color: var(--color-navy-dark);
}

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

.btn-primary:disabled {
    background-color: var(--color-gray);
    cursor: not-allowed;
    transform: none;
}

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

.btn-secondary:hover {
    background-color: var(--color-navy);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-back {
    background-color: transparent;
    color: var(--color-gray);
    border: 1px solid var(--color-gray);
    padding: 10px 20px;
    margin-bottom: 24px;
    font-size: 14px;
}

.btn-back:hover {
    background-color: var(--color-gray-light);
    color: var(--color-navy);
}

/* Tools Section */
.tools {
    padding: 80px 0;
    background-color: var(--color-gray-light);
}

.tools h2 {
    text-align: center;
    font-size: 36px;
    color: var(--color-navy);
    margin-bottom: 48px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.tool-card {
    background-color: var(--color-white);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: center;
}

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

.tool-icon {
    color: var(--color-navy);
    margin-bottom: 20px;
}

.tool-card h3 {
    font-size: 24px;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.tool-card p {
    color: var(--color-gray);
    margin-bottom: 24px;
    line-height: 1.6;
}

/* Tool Interface */
.tool-interface {
    padding: 60px 0;
    background-color: var(--color-white);
    min-height: 400px;
}

.tool-content {
    background-color: var(--color-gray-light);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.tool-header {
    margin-bottom: 32px;
}

.tool-header h2 {
    font-size: 32px;
    color: var(--color-navy);
    margin-bottom: 8px;
}

.tool-header p {
    color: var(--color-gray);
}

/* File Upload Area */
.upload-area {
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    background-color: var(--color-white);
    margin-bottom: 24px;
    transition: all 0.2s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--color-navy);
    background-color: #f1f5f9;
}

.upload-area.dragover {
    border-color: var(--color-green);
    background-color: #f0fdf4;
}

.upload-icon {
    color: var(--color-gray);
    margin-bottom: 16px;
}

.upload-area p {
    color: var(--color-gray);
    margin-bottom: 8px;
}

.upload-area input[type="file"] {
    display: none;
}

/* File List */
.file-list {
    margin: 24px 0;
}

.file-item {
    background-color: var(--color-white);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.file-icon {
    color: var(--color-navy);
}

.file-name {
    font-weight: 500;
    color: var(--color-gray-dark);
}

.file-size {
    font-size: 14px;
    color: var(--color-gray);
}

.file-remove {
    background-color: transparent;
    border: none;
    color: var(--color-error);
    cursor: pointer;
    padding: 8px;
    font-size: 20px;
    line-height: 1;
}

.file-remove:hover {
    background-color: #fef2f2;
    border-radius: 4px;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-gray-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-navy);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 14px;
    color: var(--color-gray);
    margin-top: 6px;
}

/* Radio Buttons */
.radio-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.radio-option:hover {
    border-color: var(--color-navy);
    background-color: #f8fafc;
}

.radio-option input[type="radio"] {
    width: auto;
    margin: 0;
}

.radio-option:has(input:checked) {
    border-color: var(--color-navy);
    background-color: #f1f5f9;
}

/* Action Buttons */
.tool-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* Status Messages */
.status {
    padding: 16px;
    border-radius: 8px;
    margin: 16px 0;
    display: none;
}

.status.show {
    display: block;
}

.status.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.status.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.status.info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

/* Page Info */
.page-info {
    background-color: var(--color-white);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.page-info strong {
    color: var(--color-navy);
}

/* Privacy Section */
.privacy {
    padding: 80px 0;
    background-color: var(--color-white);
}

.privacy h2 {
    text-align: center;
    font-size: 36px;
    color: var(--color-navy);
    margin-bottom: 48px;
}

.privacy-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.privacy-item {
    text-align: center;
    padding: 32px;
}

.privacy-item svg {
    color: var(--color-green);
    margin-bottom: 20px;
}

.privacy-item h3 {
    font-size: 24px;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.privacy-item p {
    color: var(--color-gray);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: var(--color-gray-light);
}

.about h2 {
    text-align: center;
    font-size: 36px;
    color: var(--color-navy);
    margin-bottom: 24px;
}

.about p {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 16px;
    color: var(--color-gray);
    line-height: 1.8;
}

.benefits-list {
    max-width: 600px;
    margin: 24px auto;
    padding: 0;
    list-style: none;
    text-align: left;
}

.benefits-list li {
    padding: 8px 0;
    color: var(--color-gray-dark);
    font-size: 16px;
    border-bottom: 1px solid #e2e8f0;
}

.benefits-list li:last-child {
    border-bottom: none;
}

.upgrade-placeholder {
    text-align: center;
    margin-top: 48px;
    padding: 32px;
    background-color: var(--color-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.upgrade-placeholder h3 {
    font-size: 24px;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.upgrade-placeholder p {
    color: var(--color-gray);
    margin-bottom: 20px;
}

/* Pro Badge */
.pro-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background-color: #e2e8f0;
    color: var(--color-gray);
    margin-left: 8px;
}

.pro-badge.active {
    background-color: var(--color-green);
    color: var(--color-navy-dark);
}

/* Pro Tool Cards */
.pro-tool {
    position: relative;
    border: 2px solid #e2e8f0;
}

.pro-badge-card {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: var(--color-green);
    color: var(--color-navy-dark);
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 10;
}

.pro-tool.locked {
    opacity: 0.7;
    cursor: not-allowed;
}

.pro-tool.locked::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    pointer-events: none;
}

.upgrade-prompt {
    text-align: center;
    padding: 20px;
    background-color: #fef3c7;
    border: 1px solid #fbbf24;
    border-radius: 8px;
    margin-top: 16px;
}

.upgrade-prompt p {
    color: #92400e;
    margin-bottom: 12px;
}

.upgrade-prompt .btn {
    background-color: #fbbf24;
    color: #92400e;
}

.upgrade-prompt .btn:hover {
    background-color: #f59e0b;
}

.pro-label {
    display: inline-block;
    background-color: var(--color-green);
    color: var(--color-navy-dark);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    margin-left: 8px;
    vertical-align: middle;
}

/* Activation Section */
.activation-section {
    max-width: 500px;
    margin: 32px auto 0;
    padding: 32px;
    background-color: var(--color-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.activation-section h3 {
    font-size: 24px;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.activation-section p {
    color: var(--color-gray);
    margin-bottom: 20px;
}

.activation-form {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.license-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 16px;
    font-family: monospace;
    letter-spacing: 1px;
}

.license-input:focus {
    outline: none;
    border-color: var(--color-navy);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.activation-status {
    font-weight: 600;
    margin-bottom: 12px;
    min-height: 24px;
}

.activation-status.success {
    color: var(--color-success);
}

.activation-status.error {
    color: var(--color-error);
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background-color: var(--color-white);
}

.pricing h2 {
    text-align: center;
    font-size: 36px;
    color: var(--color-navy);
    margin-bottom: 16px;
}

.pricing-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
    color: var(--color-gray);
    font-size: 18px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background-color: var(--color-white);
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

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

.pricing-card.corporate {
    border-color: var(--color-navy);
}

.pricing-badge {
    display: inline-block;
    background-color: #fbbf24;
    color: #92400e;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.pricing-card.corporate .pricing-badge {
    background-color: var(--color-green);
    color: var(--color-navy-dark);
}

.pricing-description {
    color: var(--color-gray);
    font-size: 16px;
    margin-bottom: 16px;
}

.pricing-guarantee {
    text-align: center;
    margin-top: 32px;
    padding: 20px;
    background-color: #f0fdf4;
    border-radius: 12px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-guarantee p {
    color: #065f46;
    font-weight: 500;
    font-size: 16px;
}

.pricing-header {
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 28px;
    color: var(--color-navy);
    margin-bottom: 16px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price {
    font-size: 56px;
    font-weight: 800;
    color: var(--color-navy);
}

.period {
    font-size: 20px;
    color: var(--color-gray);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 32px;
}

.pricing-features li {
    padding: 12px 0;
    color: var(--color-gray-dark);
    font-size: 16px;
    border-bottom: 1px solid #e2e8f0;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.btn-pricing {
    width: 100%;
    padding: 18px 32px;
    font-size: 18px;
}

.pricing-note {
    margin-top: 16px;
    font-size: 14px;
    color: var(--color-gray);
}

/* Upgrade Button */
.btn-upgrade {
    background-color: var(--color-green);
    color: var(--color-navy-dark);
    border: none;
    width: 100%;
    margin-top: 8px;
}

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

/* Feedback Section */
.feedback {
    padding: 80px 0;
    background-color: var(--color-gray-light);
    text-align: center;
}

.feedback h2 {
    font-size: 36px;
    color: var(--color-navy);
    margin-bottom: 16px;
}

.feedback p {
    color: var(--color-gray);
    margin-bottom: 24px;
    font-size: 18px;
}

/* Footer */
.footer {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
}

.footer-logo .logo-icon {
    width: 24px;
    height: 24px;
}

.footer-tagline {
    color: var(--color-green);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .header .container {
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        gap: 16px;
    }

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

    .privacy-content {
        grid-template-columns: 1fr;
    }

    .tool-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }

    .hero h1 {
        font-size: 28px;
    }

    .tools,
    .privacy,
    .about {
        padding: 60px 0;
    }

    .tools h2,
    .privacy h2,
    .about h2 {
        font-size: 28px;
    }
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-white);
    animation: spin 0.8s linear infinite;
}

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

/* Progress Bar */
.progress-container {
    width: 100%;
    background-color: #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    margin: 16px 0;
}

.progress-bar {
    height: 8px;
    background-color: var(--color-green);
    transition: width 0.3s ease;
    width: 0%;
}

/* Drag and Drop Visual Feedback */
.drag-handle {
    cursor: move;
    color: var(--color-gray);
    padding: 4px 8px;
}

.drag-handle:hover {
    color: var(--color-navy);
}

.file-item.dragging {
    opacity: 0.5;
    background-color: #f1f5f9;
}

/* Reorder pages list */
.reorder-pages-list {
    max-height: 500px;
    overflow-y: auto;
    border: 2px dashed #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    background: #f9fafb;
}

.page-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    margin-bottom: 8px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    cursor: move;
    transition: all 0.2s;
}

.page-item:hover {
    border-color: var(--color-green);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.page-item.dragging {
    opacity: 0.5;
    background: #f0fdf4;
}

.page-item .drag-handle {
    cursor: move;
    color: #9ca3af;
    font-size: 18px;
    user-select: none;
}

.page-item:hover .drag-handle {
    color: var(--color-green);
}

.page-number {
    font-weight: 500;
    color: var(--color-navy);
}

/* ============================================
   Accessibility Styles (SEO & UX)
   ============================================ */

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-navy);
    color: var(--color-white);
    padding: 8px 16px;
    z-index: 10000;
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 4px 0;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Visually hidden but accessible to screen readers */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Enhanced focus styles for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-green);
    outline-offset: 2px;
}

/* Ensure sufficient color contrast */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--color-green);
    outline-offset: 2px;
}

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

/* High contrast mode support */
@media (forced-colors: active) {
    .btn-primary {
        border: 2px solid ButtonText;
    }
    
    .btn-secondary {
        border: 2px solid ButtonText;
    }
}

/* 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;
    }
}

/* Print styles */
@media print {
    .header,
    .footer,
    .btn,
    .hero-buttons {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
    }
}