:root {
    --bg-dark: #0a0a0f;
    --bg-card: rgba(255, 255, 255, 0.03);
    --text-main: #f0f0f5;
    --text-muted: #a0a0b0;
    --accent-primary: #ff6b35; /* Vibrant orange/amber for 'spark/idea' */
    --accent-secondary: #7b2cbf; /* Deep purple */
    --accent-glow: rgba(255, 107, 53, 0.4);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
}

.highlight {
    color: var(--accent-primary);
    background: linear-gradient(90deg, var(--accent-primary), #f7b801);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Glassmorphism utility */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 5%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-primary);
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--accent-primary);
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.6);
    color: #fff;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 0 5%;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.5;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    top: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite alternate;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-primary);
    bottom: 10%;
    right: -50px;
    animation: float 8s ease-in-out infinite alternate-reverse;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

/* Sections */
.section {
    padding: 100px 5%;
}

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

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
    font-size: 1.2rem;
}

/* Cards Grid */
.about-grid, .educator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    padding: 2rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 107, 53, 0.3);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

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

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

/* Split Content */
.split-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.feature-list {
    list-style: none;
    margin-top: 2rem;
}

.feature-list li {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-list span {
    color: var(--accent-primary);
    font-weight: bold;
}

.visual-content {
    position: relative;
    height: 400px;
    border-radius: 20px;
    background: linear-gradient(45deg, rgba(255,255,255,0.05), rgba(255,255,255,0.01));
    border: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.abstract-shape {
    width: 200px;
    height: 200px;
    background: conic-gradient(from 0deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
    border-radius: 50%;
    filter: blur(20px);
    animation: spin 10s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* Educators */
.educator-card {
    padding: 2rem;
    text-align: center;
}

.avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.gradient-bg-1 { background: linear-gradient(135deg, #ff6b35, #f7b801); }
.gradient-bg-2 { background: linear-gradient(135deg, #7b2cbf, #ff6b35); }
.gradient-bg-3 { background: linear-gradient(135deg, #3a0ca3, #4361ee); }

/* CTA & Footer */
.cta-section {
    text-align: center;
}

.waitlist-form {
    max-width: 500px;
    margin: 2rem auto;
    padding: 0.5rem;
    display: flex;
    border-radius: 40px;
}

.waitlist-form input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 1rem 1.5rem;
    color: #fff;
    font-family: inherit;
    outline: none;
}

footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 4rem 5% 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.powered-by span {
    font-weight: bold;
    color: #fff;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Scroll Animation Classes */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

/* Responsive */
@media (max-width: 768px) {
    .split-content {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none; /* In a real app, add a hamburger menu */
    }
    
    .waitlist-form {
        flex-direction: column;
        border-radius: 16px;
        background: transparent;
        border: none;
    }
    
    .waitlist-form input {
        background: var(--bg-card);
        border: 1px solid rgba(255,255,255,0.1);
        border-radius: 30px;
        margin-bottom: 1rem;
    }
}