:root {
    --bg-color: #0b0f19;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #10b981;
    --accent-hover: #059669;
    --accent-secondary: #3b82f6;
    --glass-bg: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --surface: #1e293b;
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --green: #10b981;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --orange: #f59e0b;
    --red: #ef4444;
    --teal: #14b8a6;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
}

html {
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 12px;
}

p {
    color: var(--text-secondary);
}

.highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
}

/* Button Styles */
.btn-primary {
    background-color: var(--accent-primary);
    color: #fff;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 20px -10px var(--accent-primary);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -10px var(--accent-primary);
}

.btn-primary-outline {
    background: transparent;
    color: var(--accent-primary);
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 500;
    border: 1px solid var(--accent-primary);
    transition: all 0.3s;
}

.btn-primary-outline:hover {
    background: rgba(16, 185, 129, 0.1);
    transform: translateY(-1px);
}

.btn-large {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
    border: 1px solid var(--glass-border);
    padding: 20px 32px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    text-align: left;
    transition: all 0.4s;
    cursor: pointer;
    color: var(--text-primary);
}

.btn-large:hover {
    background: linear-gradient(135deg, rgba(30, 41, 59, 1), rgba(16, 185, 129, 0.15));
    border-color: rgba(16, 185, 129, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -15px rgba(16, 185, 129, 0.2);
}

.btn-large .material-icons-round {
    font-size: 2.5rem;
    color: var(--accent-primary);
    transition: transform 0.3s;
}

.btn-large:hover .material-icons-round {
    transform: scale(1.1);
}

.btn-text {
    display: flex;
    flex-direction: column;
}

.btn-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.btn-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-secondary {
    background: rgba(30, 41, 59, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 16px 0;
    transition: padding 0.3s;
}

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

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

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px -5px var(--accent-primary);
}

.logo-icon.small {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.05em;
}

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

.nav-links a:not(.btn-primary-outline) {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:not(.btn-primary-outline):hover {
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 64px;
}

.hero-text {
    flex: 1;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    max-width: 500px;
}

.cta-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
}

.security-note {
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.check-icon {
    color: var(--accent-primary);
    font-size: 1.1rem;
}

.hero-image-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

/* App Mockup */
.app-mockup {
    width: 320px;
    height: 640px;
    border-radius: 32px;
    padding: 8px;
    border: 8px solid #0f172a;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 10;
    transform: rotateY(-10deg) rotateX(5deg);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    background: #0f172a;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-mockup:hover {
    transform: rotateY(0deg) rotateX(0deg) translateY(-10px);
}

.mockup-header {
    background: var(--surface);
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-weight: 600;
    border-bottom: 1px solid var(--glass-border);
}

.mockup-body {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.folder-item, .file-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 8px;
    transition: background 0.2s;
    cursor: pointer;
}

.folder-item:hover, .file-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.icon-folder { color: #facc15; }
.icon-zip { color: var(--blue); }
.icon-rar { color: var(--purple); }
.icon-apk { color: var(--green); }

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

.file-info .name {
    font-size: 0.95rem;
    font-weight: 500;
    color: #e2e8f0;
}

.file-info .date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.mockup-fab {
    position: absolute;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
    cursor: pointer;
}

/* Floating Bubbles */
.floating-bubble {
    position: absolute;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    color: var(--text-primary);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    animation: float 6s ease-in-out infinite;
    z-index: 5;
}

.bubble-1 { top: 10%; left: -5%; animation-delay: 0s; color: var(--accent-primary); }
.bubble-2 { bottom: 20%; left: -10%; animation-delay: 1.5s; color: var(--blue); }
.bubble-3 { top: 40%; right: -15%; animation-delay: 3s; color: var(--purple); }

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Features Range */
.features {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 32px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.5);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.feature-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--green); }
.feature-icon.blue { background: rgba(59, 130, 246, 0.1); color: var(--blue); }
.feature-icon.purple { background: rgba(139, 92, 246, 0.1); color: var(--purple); }
.feature-icon.orange { background: rgba(245, 158, 11, 0.1); color: var(--orange); }
.feature-icon.red { background: rgba(239, 68, 68, 0.1); color: var(--red); }
.feature-icon.teal { background: rgba(20, 184, 166, 0.1); color: var(--teal); }

.feature-card h3 {
    margin-bottom: 16px;
}

/* Stats */
.stats {
    padding: 80px 0;
    margin: 60px 0;
    background: linear-gradient(90deg, rgba(30, 41, 59, 0.4), rgba(15, 23, 42, 0.8), rgba(30, 41, 59, 0.4));
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.stats-content {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.stat-item {
    text-align: center;
}

.stat-item h3 {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: inline-block;
}

.stat-item span {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-item .star {
    font-size: 3rem;
    vertical-align: middle;
}

.stat-break {
    width: 2px;
    height: 60px;
    background: var(--glass-border);
}

/* Download Section */
.download-section {
    padding: 100px 0;
}

.download-box {
    display: flex;
    gap: 48px;
    padding: 48px;
    align-items: center;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.6), rgba(15, 23, 42, 0.8));
    position: relative;
    overflow: hidden;
}

.download-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.download-info {
    flex: 1.2;
}

.version-details {
    margin-top: 32px;
    background: rgba(0, 0, 0, 0.2);
    padding: 24px;
    border-radius: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.detail-item {
    display: flex;
    flex-direction: column;
}

.detail-item .label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.detail-item .value {
    font-weight: 500;
    color: var(--text-primary);
}

.download-actions {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Footer */
footer {
    background: #060912;
    padding: 80px 0 24px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 64px;
    margin-bottom: 64px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand p {
    margin-top: 24px;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.link-group h4 {
    color: var(--text-primary);
    margin-bottom: 24px;
    font-weight: 600;
}

.link-group a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 12px;
    transition: color 0.2s;
}

.link-group a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    width: 90%;
    max-width: 400px;
    transform: translateY(20px);
    transition: transform 0.3s;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 32px 24px;
    text-align: center;
}

.download-progress-circle {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 24px;
}

.circular-chart {
    display: block;
    margin: 0 auto;
    max-width: 80%;
    max-height: 250px;
}

.circle-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 2.5;
}

.circle {
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    transition: stroke-dasharray 0.3s ease;
}

.circular-chart.green .circle {
    stroke: var(--accent-primary);
}

.percentage {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.download-status {
    margin-top: 12px;
    color: var(--accent-primary);
    font-weight: 500;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: flex-end;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .cta-group {
        align-items: center;
    }
    
    h1 {
        font-size: 2.8rem;
    }
    
    .download-box {
        flex-direction: column;
        text-align: center;
    }
    
    .version-details {
        text-align: left;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 40px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 40px;
    }
    
    .stat-break {
        display: none;
    }
    
    .version-details {
        grid-template-columns: 1fr;
    }
    
    .app-mockup {
        transform: none;
    }
    .app-mockup:hover {
        transform: translateY(-10px);
    }
}