/* CSS Variables & Theme Setup */
:root {
    --bg-dark: #070b19;
    --bg-card: rgba(255, 255, 255, 0.02);
    --bg-card-hover: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.15);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary-cyan: #00f2fe;
    --primary-blue: #4facfe;
    --primary-purple: #8a2be2;
    --primary-indigo: #4f46e5;
    
    --gradient-primary: linear-gradient(135deg, var(--primary-cyan) 0%, var(--primary-blue) 100%);
    --gradient-purple: linear-gradient(135deg, var(--primary-purple) 0%, #a855f7 100%);
    --gradient-glow: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-dark);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

/* Container Utility */
.nav-container,
.hero-container,
.features-section,
.download-section,
.instructions-container,
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: #050813;
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 15px;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-normal);
    gap: 8px;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #070b19;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 242, 254, 0.4);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-download {
    background: var(--gradient-primary);
    color: #070b19;
    font-size: 16px;
    padding: 14px 32px;
    width: 100%;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.15);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.35);
}

.btn-purple {
    background: var(--gradient-purple);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(138, 43, 226, 0.15);
}

.btn-purple:hover {
    box-shadow: 0 6px 20px rgba(138, 43, 226, 0.35);
}

.btn-nav {
    padding: 8px 20px;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-nav:hover {
    background: var(--gradient-primary);
    color: #070b19;
    border-color: transparent;
}

/* HEADER / NAVBAR */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(7, 11, 25, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.nav-container {
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.5px;
}

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

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

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.nav-menu a.nav-cta-secondary {
    position: relative;
}

.nav-menu a.nav-cta-secondary::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-menu a.nav-cta-secondary:hover::after {
    width: 100%;
}

/* HERO SECTION */
.hero-section {
    padding-top: 160px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: var(--gradient-glow);
    pointer-events: none;
    z-index: 0;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: 48px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
}

.hero-content h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 540px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.2);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-cyan);
    margin-bottom: 24px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background-color: var(--primary-cyan);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 10px var(--primary-cyan);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.4); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-graphic {
    display: flex;
    justify-content: center;
}

.graphic-wrapper {
    position: relative;
    border-radius: 20px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.hero-image {
    border-radius: 14px;
    transition: var(--transition-normal);
}

.graphic-wrapper:hover .hero-image {
    transform: scale(1.02);
}

.glow-effect {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: 2;
}

/* FEATURES SECTION */
.features-section {
    padding: 100px 24px;
    position: relative;
}

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

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 36px;
    border-radius: 16px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-fast);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 242, 254, 0.05);
    border-radius: 12px;
    color: var(--primary-cyan);
    margin-bottom: 24px;
}

.feature-card:nth-child(even) .feature-icon {
    background: rgba(138, 43, 226, 0.05);
    color: #a855f7;
}

.feature-card:nth-child(even)::before {
    background: var(--gradient-purple);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* DOWNLOAD SECTION */
.download-section {
    padding: 100px 24px;
    background: radial-gradient(100% 100% at 50% 100%, rgba(138, 43, 226, 0.03) 0%, transparent 100%);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

@media (max-width: 900px) {
    .download-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
}

.download-card {
    background: rgba(10, 16, 35, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-normal);
}

.download-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.02) 0%, transparent 50%);
    pointer-events: none;
    transition: var(--transition-normal);
}

.download-card:nth-child(2) .card-glow {
    background: radial-gradient(circle, rgba(138, 43, 226, 0.02) 0%, transparent 50%);
}

.download-card:hover .card-glow {
    opacity: 1.5;
}

.card-content {
    position: relative;
    z-index: 1;
}

.app-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.15);
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--primary-cyan);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.app-badge.badge-purple {
    background: rgba(138, 43, 226, 0.08);
    border-color: rgba(138, 43, 226, 0.15);
    color: #a855f7;
}

.download-card h3 {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.filename {
    font-family: monospace;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.app-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    height: 72px;
}

@media (max-width: 768px) {
    .app-desc {
        height: auto;
    }
}

.app-specs {
    list-style: none;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    margin-bottom: 36px;
}

.app-specs li {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
}

.app-specs li strong {
    color: var(--text-primary);
}

/* INSTRUCTIONS SECTION */
.instructions-section {
    padding: 100px 24px;
    background: #050813;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.instructions-container {
    max-width: 800px;
}

.instructions-container h2 {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.step-item {
    display: flex;
    gap: 24px;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 18px;
    color: var(--primary-cyan);
    flex-shrink: 0;
}

.step-item:nth-child(2) .step-number {
    color: #a855f7;
}

.step-text h4 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-text strong {
    color: var(--text-primary);
}

/* FOOTER */
.footer {
    background-color: var(--bg-dark);
    padding: 80px 24px 40px 24px;
    font-size: 14px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 360px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
}

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

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.footer-links h4 {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* RESPONSIVE DESIGN */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 40px;
    }
    
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-graphic {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 10px 0;
    }
    
    .nav-menu {
        display: none; /* simple responsive choice or we can hide links */
    }
    
    .navbar .btn-nav {
        display: flex;
    }
    
    .hero-section {
        padding-top: 120px;
        padding-bottom: 60px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
}