/* ========================================
   Landing Page Styles
   ======================================== */

/* CSS Variables for Theming */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --nav-bg: rgba(255, 255, 255, 0.98);
    --card-bg: #f8fafc;
    --card-hover-bg: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] {
    --bg-primary: #18181b;
    --bg-secondary: #27272a;
    --bg-tertiary: #3f3f46;
    --text-primary: #f4f4f5;
    --text-secondary: #e4e4e7;
    --text-tertiary: #a1a1aa;
    --nav-bg: rgba(24, 24, 27, 0.98);
    --card-bg: #27272a;
    --card-hover-bg: #3f3f46;
    --border-color: #52525b;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* Base Landing Page */
.landing-page {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-secondary);
    overflow-x: hidden;
    transition: background-color 0.3s ease;
}

/* Navigation */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 28px;
    font-weight: 700;
    color: #3b82f6;
    cursor: pointer;
}

.nav-logo i {
    font-size: 32px;
}

.nav-logo-image {
    height: 46px;
    width: auto;
    max-width: 120px;
    object-fit: contain;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #3b82f6;
}

.theme-toggle-btn {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
}

.theme-toggle-btn:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.nav-login-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white !important;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.nav-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding-top: 70px;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: heroAnimation 20s ease-in-out infinite;
}

@keyframes heroAnimation {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 40px 20px;
}

.hero-title {
    font-size: 72px;
    font-weight: 800;
    margin: 0 0 20px 0;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 32px;
    font-weight: 600;
    margin: 0 0 20px 0;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-description {
    font-size: 18px;
    line-height: 1.8;
    margin: 0 0 50px 0;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

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

/* Download Buttons */
.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease-out 0.6s backwards;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.95);
    color: #1e293b;
    padding: 18px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    background: white;
}

.download-btn i {
    font-size: 40px;
}

.download-btn.android i {
    color: #3ddc84;
}

.download-btn.ios i {
    color: #000000;
}

.download-btn.pc i {
    color: #0078d4;
}

.download-btn div {
    text-align: left;
}

.download-btn small {
    display: block;
    font-size: 12px;
    opacity: 0.7;
}

.download-btn strong {
    display: block;
    font-size: 18px;
}

/* Social Links */
.social-links {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease-out 0.8s backwards;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    font-size: 24px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: white;
    color: #3b82f6;
    transform: translateY(-5px);
}

/* Section Styles */
section {
    padding: 100px 0;
}

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

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

.section-header h2 {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 15px 0;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
    margin: 0;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-color: #3b82f6;
    background: var(--card-hover-bg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 36px;
    color: white;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 15px 0;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* Gallery Section */
.gallery-section {
    background: var(--bg-secondary);
}

.video-showcase {
    margin-bottom: 50px;
}

.video-container {
    max-width: 900px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.video-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.video-placeholder:hover {
    transform: scale(1.02);
}

.video-placeholder i {
    font-size: 80px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.video-placeholder p {
    font-size: 24px;
    font-weight: 600;
    margin: 0;
}

.video-placeholder small {
    font-size: 14px;
    opacity: 0.8;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.screenshot-item {
    aspect-ratio: 16 / 9;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.screenshot-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.screenshot-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.screenshot-placeholder i {
    font-size: 48px;
    margin-bottom: 10px;
    opacity: 0.7;
}

.screenshot-placeholder p {
    font-size: 14px;
    margin: 0;
    opacity: 0.9;
}

/* News Section */
.news-section {
    background: var(--bg-primary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 30px;
    display: flex;
    gap: 20px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: #3b82f6;
    background: var(--card-hover-bg);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border-radius: 12px;
    padding: 15px;
    min-width: 70px;
}

.news-date .day {
    font-size: 28px;
    font-weight: 700;
    line-height: 1;
}

.news-date .month {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
}

.news-content {
    flex: 1;
}

.news-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px 0;
}

.news-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 15px 0;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #3b82f6;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: gap 0.3s ease;
}

.news-link:hover {
    gap: 12px;
}

/* Requirements Section */
.requirements-section {
    background: var(--bg-secondary);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.requirement-card {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.requirement-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.requirement-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 40px;
    color: white;
}

.requirement-card h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 25px 0;
}

.requirement-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.requirement-card li {
    font-size: 15px;
    color: var(--text-secondary);
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.requirement-card li:last-child {
    border-bottom: none;
}

.requirement-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

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

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

.faq-item {
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active {
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.2);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    background: none;
    border: none;
    text-align: left;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: #3b82f6;
}

.faq-question i {
    font-size: 14px;
    color: #3b82f6;
    transition: transform 0.3s ease;
}

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

.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;
    padding: 0 30px 25px;
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 15px;
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact-section .section-header h2,
.contact-section .section-header p {
    color: white;
}

.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 50px;
}

.contact-info h3,
.contact-form-wrapper h3 {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 30px 0;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.contact-item i {
    font-size: 28px;
    opacity: 0.9;
}

.contact-item strong {
    display: block;
    font-size: 16px;
    margin-bottom: 5px;
}

.contact-item p {
    margin: 0;
    font-size: 14px;
    opacity: 0.9;
}

.contact-form-wrapper {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.95);
    color: #1e293b;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #64748b;
}

.contact-form select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: white;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: white;
    color: #667eea;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* Footer */
.landing-footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 20px 0;
}

.footer-section p {
    font-size: 14px;
    color: #cbd5e1;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #3b82f6;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin: 0;
    font-size: 14px;
    color: #94a3b8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 24px;
    }
    
    .hero-description {
        font-size: 16px;
        padding: 0 15px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: calc(100% - 40px);
        max-width: 280px;
        justify-content: center;
        margin: 0;
        box-sizing: border-box;
    }

    .download-btn i {
        font-size: 32px;
    }
    
    .download-btn div {
        text-align: left;
    }
    
    .download-btn small {
        font-size: 11px;
    }
    
    .download-btn strong {
        font-size: 16px;
    }
    
    .section-header h2 {
        font-size: 32px;
    }
    
    .features-grid,
    .news-grid,
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 14px;
    }
    
    .nav-logo {
        font-size: 22px;
    }
    
    .nav-logo i {
        font-size: 26px;
    }
    
    .nav-logo-image {
        height: 46px;
        max-width: 100px;
        border-radius: 8px;
    }
    
    .download-btn {
        max-width: 280px;
        width: calc(100% - 30px);
        box-sizing: border-box;
    }
    
    .download-buttons {
        padding: 0;
        gap: 12px;
    }
    
    .social-links a {
        width: 45px;
        height: 45px;
        font-size: 20px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .feature-card,
    .requirement-card {
        padding: 30px 20px;
    }
}

/* Screenshot Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90%;
    animation: modalFadeIn 0.3s ease-out;
}

.modal-content img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 35px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: #ff6b6b;
}

.modal-caption {
    text-align: center;
    color: white;
    padding: 20px 0;
    font-size: 18px;
    font-weight: 500;
}

.screenshot-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.screenshot-preview:hover {
    transform: scale(1.02);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}