/* Design System - Syllabus Landing Page */

:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --accent: #d946ef;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

h1, h2, h3, .logo-text {
    font-family: 'Outfit', sans-serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    height: 80px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.8);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

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

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

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

/* Hero */
.hero {
    padding: 10rem 0 6rem;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    z-index: -1;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-title span {
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

.hero-image {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
}

.hero-image img {
    width: 100%;
    display: block;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    cursor: pointer;
}

.btn-xl {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.3);
}

.btn-outline {
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

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

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

/* Features */
.features {
    padding: 8rem 0;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

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

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

/* Pricing */
.pricing {
    padding: 8rem 0;
    background: rgba(15, 23, 42, 0.3);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.pricing-card {
    background: var(--bg-card);
    padding: 3rem 2rem;
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    text-align: center;
    position: relative;
    transition: all 0.3s;
}

.pricing-card.featured {
    border: 2px solid var(--primary);
    transform: scale(1.05);
    background: rgba(139, 92, 246, 0.05);
}

.badge {
    position: absolute;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass);
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid var(--glass-border);
}

.pricing-card h3 {
    font-size: 2rem;
    margin: 1rem 0;
}

.pricing-card .desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    min-height: 40px;
}

.pricing-card .price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.pricing-card .price span {
    font-size: 1.2rem;
    color: var(--text-muted);
}

.pricing-card .monthly, .pricing-card .offer {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.plan-features {
    list-style: none;
    text-align: left;
    margin-bottom: 3rem;
}

.plan-features li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.pricing-footer {
    text-align: center;
    background: var(--glass);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.pricing-footer strong {
    color: var(--accent);
}

/* CTA */
.cta {
    padding: 4rem 0 8rem;
}

.cta-card {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent) 100%);
    padding: 4rem;
    border-radius: 32px;
    text-align: center;
    color: white;
}

.cta-card h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-card p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    padding: 4rem 0;
    border-top: 1px solid var(--glass-border);
}

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

.footer-info p {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-title {
        font-size: 3rem;
    }
    .hero-btns {
        justify-content: center;
    }
}