/* =========================================
   Doc Scanner Landing Page - CSS Styles
   ========================================= */

/* CSS Variables */
:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --secondary-color: #06B6D4;
    --accent-color: #F59E0B;
    --success-color: #10B981;
    --danger-color: #EF4444;

    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;

    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;

    --border-color: #E5E7EB;
    --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);

    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 30px;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
}

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

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-xl {
    padding: 20px 40px;
    font-size: 1.125rem;
}

.btn-xl .btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.btn-xl .btn-text .small {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.9;
}

.btn-xl .btn-text .large {
    font-size: 1.25rem;
    font-weight: 700;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-top: 16px;
}

/* =========================================
   Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo img {
    border-radius: var(--border-radius-sm);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: 10px 20px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-color);
    margin-bottom: 24px;
}

.hero-badge i {
    color: var(--accent-color);
}

.hero h1 {
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-image {
    position: relative;
}

.phone-mockup {
    position: relative;
    max-width: 350px;
    margin: 0 auto;
}

.phone-mockup img {
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    font-weight: 600;
    font-size: 0.875rem;
}

.floating-card i {
    font-size: 1.25rem;
}

.floating-card.card-1 {
    top: 20%;
    left: -60px;
    color: var(--danger-color);
}

.floating-card.card-1 i {
    color: var(--danger-color);
}

.floating-card.card-2 {
    bottom: 25%;
    right: -60px;
    color: var(--success-color);
}

.floating-card.card-2 i {
    color: var(--success-color);
}

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: -1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-color);
    bottom: -50px;
    left: -50px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--accent-color);
    top: 50%;
    left: 30%;
}

/* =========================================
   Trust Badges
   ========================================= */
.trust-badges {
    padding: 40px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.badges-wrapper {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-weight: 500;
}

.badge-item i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

/* =========================================
   Features Section
   ========================================= */
.features {
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.feature-card {
    padding: 30px;
    background: white;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-radius: var(--border-radius-md);
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.feature-card h3 {
    margin-bottom: 12px;
}

.feature-card > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.feature-list li i {
    color: var(--success-color);
    font-size: 0.875rem;
}

.more-features {
    text-align: center;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
}

.more-features h3 {
    margin-bottom: 30px;
}

.more-features-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.mini-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: white;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.mini-feature i {
    color: var(--primary-color);
}

/* =========================================
   How It Works Section
   ========================================= */
.how-it-works {
    background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
}

.steps-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
}

.step {
    flex: 1;
    max-width: 300px;
    text-align: center;
    padding: 30px;
    position: relative;
}

.step-number {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    border-radius: 50%;
    font-size: 1.125rem;
}

.step-icon {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    margin: 30px auto 20px;
    box-shadow: var(--shadow-md);
}

.step-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.step h3 {
    margin-bottom: 12px;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.step-connector {
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin-top: 100px;
    opacity: 0.3;
}

/* =========================================
   Screenshots Section
   ========================================= */
.screenshots {
    background: var(--text-primary);
    color: white;
}

.screenshots .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.screenshots h2 {
    color: white;
}

.screenshots p {
    color: rgba(255, 255, 255, 0.7);
}

.screenshots-slider {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.screenshots-slider::-webkit-scrollbar {
    display: none;
}

.screenshot-item {
    flex: 0 0 auto;
    width: 250px;
    scroll-snap-align: center;
}

.screenshot-item img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

/* =========================================
   Use Cases Section
   ========================================= */
.use-cases {
    background: var(--bg-primary);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.use-case-card {
    text-align: center;
    padding: 40px 30px;
    background: white;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
}

.use-case-icon i {
    font-size: 2rem;
    color: white;
}

.use-case-card h3 {
    margin-bottom: 12px;
}

.use-case-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* =========================================
   Testimonials Section
   ========================================= */
.testimonials {
    background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    padding: 30px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.stars i {
    color: var(--accent-color);
}

.testimonial-card > p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.author-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    border-radius: 50%;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    font-weight: 600;
}

.author-info span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* =========================================
   Comparison Section
   ========================================= */
.comparison {
    background: var(--bg-primary);
}

.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--bg-secondary);
    font-weight: 600;
}

.comparison-table th.highlight {
    background: var(--primary-color);
    color: white;
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: 500;
}

.comparison-table td.highlight {
    background: rgba(79, 70, 229, 0.05);
}

.comparison-table .fa-check-circle {
    color: var(--success-color);
    font-size: 1.25rem;
}

.comparison-table .fa-times-circle {
    color: var(--text-light);
    font-size: 1.25rem;
}

/* =========================================
   FAQ Section
   ========================================= */
.faq {
    background: var(--bg-secondary);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--border-radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-question i {
    transition: transform var(--transition-normal);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* =========================================
   Download CTA Section
   ========================================= */
.download-cta {
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.download-cta .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.cta-content h2 {
    color: white;
    margin-bottom: 16px;
}

.cta-content > p {
    opacity: 0.9;
    font-size: 1.125rem;
    margin-bottom: 32px;
}

.cta-buttons {
    margin-bottom: 24px;
}

.cta-buttons .btn {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.cta-features {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.cta-features span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    opacity: 0.9;
}

.cta-image {
    position: relative;
}

.cta-image img {
    max-width: 350px;
    margin: 0 auto;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 30px;
}

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

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin: 16px 0 24px;
}

.footer-brand .logo span {
    color: white;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
}

.footer-links h4 {
    color: white;
    margin-bottom: 20px;
    font-size: 1rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* =========================================
   Back to Top Button
   ========================================= */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
}

/* =========================================
   Responsive Styles
   ========================================= */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        max-width: 400px;
        margin: 40px auto 0;
    }

    .floating-card {
        display: none;
    }

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

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

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

    .download-cta .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .cta-features {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .nav-links,
    .nav-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

    .steps-container {
        flex-direction: column;
        align-items: center;
    }

    .step-connector {
        width: 2px;
        height: 50px;
        margin: 0;
    }

    .use-cases-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .social-links {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

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

    .hero {
        padding: 120px 0 60px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .btn-lg {
        padding: 14px 24px;
        font-size: 1rem;
    }

    .badges-wrapper {
        gap: 20px;
    }

    .badge-item span {
        display: none;
    }

    .badge-item i {
        font-size: 1.5rem;
    }
}

/* =========================================
   Mobile Menu (JS Controlled)
   ========================================= */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}