/* Base Tokens and Root Variables */
:root {
    --bg-dark: #0a0a0f;
    --bg-card: rgba(20, 20, 30, 0.6);
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    
    --primary-color: #6366f1; /* Indigo */
    --secondary-color: #a855f7; /* Purple */
    --accent-color: #ec4899; /* Pink */
    
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glow-spread: 0 0 20px rgba(99, 102, 241, 0.4);
    
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* Reset and Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

body::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.08), transparent 30%),
                radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.08), transparent 30%);
    pointer-events: none;
    z-index: -1;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* Typography elements */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
}

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

/* Buttons */
.btn {
    display: inline-block;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-small {
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: #fff;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Glassmorphism Classes */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.glass-nav.scrolled {
    padding-top: 10px;
    padding-bottom: 10px;
    box-shadow: var(--glass-shadow);
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--glass-shadow);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
}

.glass-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--glow-spread), var(--glass-shadow);
    border-color: rgba(255,255,255,0.2);
}

/* Header & Nav */
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: padding 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-image {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 8px;
    display: inline-block;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a:not(.btn) {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
}

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

/* Hero Section */
.hero {
    position: relative;
    padding: 12rem 2rem 8rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-bg-glow {
    position: absolute;
    width: 60vw;
    height: 60vw;
    top: -20vh;
    left: 20vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(10, 10, 15, 0) 70%);
    z-index: 0;
    filter: blur(80px);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: -1.5px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

/* Features Section */
.features {
    padding: 8rem 2rem;
}

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

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    padding: 3rem 2rem;
    text-align: left;
}

.feature-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    margin-bottom: 1.5rem;
}

.icon-blue { background: linear-gradient(135deg, #3b82f6, #60a5fa); }
.icon-purple { background: linear-gradient(135deg, #8b5cf6, #c084fc); }
.icon-pink { background: linear-gradient(135deg, #ec4899, #f472b6); }

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* CTA Section */
.cta {
    padding: 4rem 2rem 8rem;
    text-align: center;
}

.cta-card {
    max-width: 1000px;
    margin: 0 auto;
    padding: 5rem 2rem;
    background: linear-gradient(180deg, rgba(30, 30, 45, 0.4) 0%, rgba(20, 20, 30, 0.8) 100%);
    border-color: rgba(99, 102, 241, 0.3);
}

.cta-card h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.cta-card p {
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-bottom: 3rem;
}

/* Footer */
footer {
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 4rem 2rem 2rem;
    background: #050508;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.link-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.link-col a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

/* Animations - Intersection Observer hook */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero-title { font-size: 3rem; }
    .nav-links { display: none; } /* Simplified mobile for now */
    .hero-buttons { flex-direction: column; }
    .footer-container { flex-direction: column; }
}