:root {
    --bg-dark: #09090b;
    --bg-card: #18181b;
    --bg-card-hover: #27272a;
    --text-primary: #f8fafc;
    --text-secondary: #a1a1aa;
    --accent-blue: #3b82f6;
    --accent-indigo: #6366f1;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-green: #10b981;
    
    --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --gradient-text: linear-gradient(to right, #60a5fa, #c084fc, #f472b6);
    --gradient-ai: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
    
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(9, 9, 11, 0.8);
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
    padding: 16px 0;
}

.navbar.scrolled {
    padding: 12px 0;
    border-bottom-color: var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

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

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.04em;
}

.logo .dot {
    color: var(--accent-blue);
}

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

.nav-links a:not(.btn) {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-dark);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--gradient-text);
    color: white;
    box-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
    padding: 10px 20px;
}

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

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(59, 130, 246, 0.1) 40%, transparent 60%);
    filter: blur(80px);
    z-index: 0;
    pointer-events: none;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

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

/* Hero App Mockup */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-image::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
    filter: blur(40px);
    z-index: -1;
}

.app-mockup {
    width: 280px;
    height: 580px;
    background: var(--bg-card);
    border: 8px solid #27272a;
    border-radius: 40px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--border-color);
    overflow: hidden;
    transform: rotate(5deg) translateY(-10px);
    animation: floating 6s ease-in-out infinite;
}

@keyframes floating {
    0% { transform: rotate(5deg) translateY(0px); }
    50% { transform: rotate(5deg) translateY(-20px); }
    100% { transform: rotate(5deg) translateY(0px); }
}

.app-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #18181b 0%, #09090b 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.ai-orb {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.5), inset 0 0 20px rgba(255, 255, 255, 0.5);
    animation: pulse 3s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 40px rgba(139, 92, 246, 0.5); }
    100% { transform: scale(1.05); box-shadow: 0 0 60px rgba(59, 130, 246, 0.7); }
}

.app-ui {
    position: absolute;
    bottom: 80px;
    width: 80%;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 16px;
}

.ui-bar {
    height: 30px;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    margin-bottom: 12px;
}

.ui-line {
    height: 8px;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    margin-bottom: 8px;
}

.ui-line.short {
    width: 60%;
}

.app-status {
    position: absolute;
    bottom: 30px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
}

/* Sections */
.section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

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

/* Features Profile */
.features {
    background-color: rgba(255, 255, 255, 0.01);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.05) 0%, transparent 60%);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
}

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

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

.icon-blue { background: rgba(59, 130, 246, 0.1); color: var(--accent-blue); }
.icon-purple { background: rgba(139, 92, 246, 0.1); color: var(--accent-purple); }
.icon-red { background: rgba(236, 72, 153, 0.1); color: var(--accent-pink); }
.icon-green { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); }

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* How It Works */
.workflow {
    display: flex;
    flex-direction: column;
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: center;
    gap: 30px;
    background: var(--bg-card);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.step:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.step-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.step-icon.ai-glow {
    background: var(--gradient-ai);
    border-color: rgba(139, 92, 246, 0.3);
    color: var(--accent-purple);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.2);
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.step-connector {
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, var(--border-color), rgba(255, 255, 255, 0.2));
    margin: 0 0 0 80px;
}

/* Footer */
.footer {
    padding: 80px 0 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 12px;
    font-size: 1.1rem;
}

.hackathon-badge {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 16px 32px;
    border-radius: 999px;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.3);
}

.hackathon-badge strong {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.footer-bottom {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

/* Animations & Utilities */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Media Queries */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin: 0 auto 40px;
    }

    .hero-cta {
        justify-content: center;
    }
    
    .hero-image {
        margin-top: 60px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 30px 20px;
    }
    
    .step-connector {
        margin: 0 auto;
        height: 40px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}