/* AnyDesk Download Site Styles - Red & Orange Tech Theme */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #1A202C;
    background-color: #FFFFFF;
}

/* ===== CSS Variables ===== */
:root {
    --primary: #E53E3E;
    --primary-dark: #C53030;
    --accent: #F6AD55;
    --accent-orange: #FF6B35;
    --bg-white: #FFFFFF;
    --bg-light: #FFF5F5;
    --bg-gray: #F7FAFC;
    --text-dark: #1A202C;
    --text-gray: #4A5568;
    --text-light: #718096;
    --border: #E2E8F0;
    --shadow: 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);
    --radius: 12px;
    --radius-lg: 16px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0 20px;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    max-width: 1200px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 36px;
    width: auto;
}

.logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
}

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

.nav a {
    color: var(--text-gray);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

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

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

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: 0.3s;
}

/* ===== Hero Section ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-content h1 {
    color: var(--text-dark);
    margin-bottom: 20px;
}

.hero-content h1 span {
    color: var(--primary);
}

.hero-content .subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-content .subtitle strong {
    color: var(--primary);
}

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(229, 62, 62, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 62, 62, 0.5);
    color: white;
}

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

.btn-secondary:hover {
    background: var(--bg-light);
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.hero-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* ===== Stats Section ===== */
.stats {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 60px 0;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.9;
}

/* ===== Section Common ===== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header h2 span {
    color: var(--primary);
}

.section-header p {
    color: var(--text-gray);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.bg-light {
    background: var(--bg-light);
}

/* ===== Installation Steps ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
}

.steps-grid::before {
    content: '';
    position: absolute;
    top: 45px;
    left: 12.5%;
    right: 12.5%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    z-index: 0;
}

.step-item {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    margin: 0 auto 24px;
    box-shadow: 0 8px 25px rgba(229, 62, 62, 0.3);
}

.step-item h4 {
    margin-bottom: 12px;
    color: var(--text-dark);
}

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

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: white;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--bg-light) 0%, #FEE2E2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

.feature-card h4 {
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-gray);
    font-size: 0.9375rem;
}

/* ===== Scenes Grid ===== */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.scene-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.scene-card img {
    aspect-ratio: 16/9;
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: var(--radius);
}

.scene-card .scene-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
    padding: 40px 20px 20px;
    color: white;
}

.scene-overlay h4 {
    margin-bottom: 4px;
}

.scene-overlay p {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ===== Pricing Table ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.pricing-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    border: 2px solid var(--border);
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card.featured {
    border-color: var(--primary);
    transform: scale(1.05);
}

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

.pricing-card.featured {
    box-shadow: 0 10px 40px rgba(229, 62, 62, 0.2);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border);
}

.pricing-header h3 {
    margin-bottom: 8px;
}

.pricing-header .price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.pricing-header .price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-gray);
}

.pricing-header .desc {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-top: 8px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--bg-gray);
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-gray);
}

.pricing-features li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
}

.pricing-features li.disabled {
    color: var(--text-light);
    text-decoration: line-through;
}

.pricing-features li.disabled::before {
    content: '✗';
    color: var(--text-light);
}

.pricing-card .btn {
    width: 100%;
}

/* ===== FAQ Section ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius);
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    padding: 24px;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: background 0.3s;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 24px;
    color: var(--text-gray);
    line-height: 1.8;
}

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

.testimonial-card {
    background: white;
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.testimonial-content {
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 24px;
    position: relative;
}

.testimonial-content::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.2;
    position: absolute;
    top: -20px;
    left: -10px;
    font-family: Georgia, serif;
}

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

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.testimonial-info h5 {
    color: var(--text-dark);
    margin-bottom: 4px;
}

.testimonial-info p {
    color: var(--text-light);
    font-size: 0.875rem;
}

.testimonial-stars {
    color: #FFC107;
    font-size: 0.875rem;
    margin-top: 4px;
}

/* ===== Footer ===== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
    margin-top: 16px;
    font-size: 0.9375rem;
    line-height: 1.7;
}

.footer-column h5 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: rgba(255,255,255,0.7);
    font-size: 0.9375rem;
    transition: color 0.3s;
}

.footer-column ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    font-size: 0.875rem;
}

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

/* ===== Legal Pages ===== */
.legal-page {
    padding-top: 100px;
}

.legal-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.legal-header h1 {
    margin-bottom: 12px;
}

.legal-header p {
    opacity: 0.9;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.legal-content h2 {
    font-size: 1.5rem;
    margin: 40px 0 20px;
    color: var(--text-dark);
}

.legal-content h3 {
    font-size: 1.25rem;
    margin: 30px 0 16px;
    color: var(--text-dark);
}

.legal-content p {
    margin-bottom: 16px;
    color: var(--text-gray);
    line-height: 1.8;
}

.legal-content ul {
    margin: 16px 0;
    padding-left: 24px;
    color: var(--text-gray);
}

.legal-content li {
    margin-bottom: 12px;
    line-height: 1.7;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 0;
    }
    
    .btn-group {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .steps-grid::before {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scenes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .stat-item h3 {
        font-size: 2.25rem;
    }
    
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .features-grid,
    .scenes-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== Image Styles ===== */
img {
    max-width: 100%;
    height: auto;
}

img[alt] {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.bg-primary { background: var(--primary); }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }