:root {
    --primary: #0ea5e9;
    --primary-glow: rgba(14, 165, 233, 0.5);
    --secondary: #2dd4bf;
    --accent: #fbbf24;
    --background: #020617;
    --card-bg: rgba(30, 41, 59, 0.4);
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --nav-height: 80px;
}

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

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

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--background);
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.blue-gradient-text {
    background: linear-gradient(135deg, #0ea5e9 0%, #2dd4bf 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

section {
    padding: 100px 0;
}

/* --- Glassmorphism --- */
.glass {
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
}

/* --- Navigation --- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

nav.scrolled {
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    height: 70px;
}

nav .container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
}

.logo i {
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

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

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
}

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

.cta-nav {
    background: var(--primary);
    color: #fff !important;
    padding: 10px 24px;
    border-radius: 12px;
    transition: all 0.3s !important;
}

.cta-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--primary-glow);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--nav-height);
    overflow: hidden;
}

/* Background Gradients */
.hero-blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    z-index: -1;
    opacity: 0.5;
}

.blob-1 { top: -200px; right: -100px; background: radial-gradient(circle, rgba(14, 165, 233, 0.3) 0%, transparent 70%); }
.blob-2 { bottom: -200px; left: -100px; background: radial-gradient(circle, rgba(45, 212, 191, 0.2) 0%, transparent 70%); }

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size:clamp(3rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 48px;
}

.btn {
    padding: 16px 32px;
    border-radius: 16px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s;
    cursor: pointer;
}

.btn-primary {
    background: #fff;
    color: var(--background);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.2);
}

.btn-outline {
    border: 2px solid var(--glass-border);
    color: #fff;
}

.btn-outline:hover {
    background: var(--glass);
    border-color: #fff;
}

/* Mockup Display */
.hero-mockup {
    position: relative;
}

.phone-wrapper {
    width: 320px;
    height: 640px;
    background: #0f172a;
    border-radius: 40px;
    border: 8px solid #1e293b;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
    box-shadow: 0 50px 100px -20px rgba(0,0,0,0.5);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.phone-screen i {
    font-size: 80px;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

/* --- Features Section --- */
.features-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.features-header h2 {
    font-size: 3rem;
    margin-bottom: 16px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 48px;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-12px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
}

.feature-card i {
    font-size: 2.5rem;
    margin-bottom: 24px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-muted);
}

/* --- Download Section --- */
.download-box {
    padding: 80px;
    text-align: center;
}

.download-box h2 {
    font-size: 3.5rem;
    margin-bottom: 24px;
}

.install-guide {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin: 60px 0;
}

.step {
    text-align: center;
}

.step-num {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-weight: 800;
    font-size: 1.25rem;
}

.step h4 {
    margin-bottom: 8px;
}

.step p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- Footer --- */
footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--glass-border);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
}

.footer-brand p {
    margin-top: 16px;
    color: var(--text-muted);
    max-width: 300px;
}

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

.footer-col h5 {
    color: #fff;
    margin-bottom: 24px;
    font-size: 1rem;
}

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

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

.footer-col a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Animations --- */
@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* --- Status Dot --- */
.health-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 10px currentColor;
}

/* --- Responsive --- */
@media (max-width: 968px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        justify-content: center;
    }
    .install-guide {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-top {
        flex-direction: column;
        gap: 48px;
    }
    .footer-nav {
        gap: 40px;
        flex-wrap: wrap;
    }
}