:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --accent-color: #df1e12;
    /* Cornell Red */
    --accent-dark: #b31b1b;
    --secondary-text: #666666;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.1);
    --font-main: 'Inter', sans-serif;
    --font-serif: 'Merriweather', serif;
    --container-width: 1100px;
}

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

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

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

.gradient-text {
    background: linear-gradient(135deg, var(--accent-color), #ff4d4d);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 5rem 0;
}

/* Hero Section */
.hero {
    position: relative;
    height: 80vh;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: url('assets/images/cornell-hero.png') center/cover no-repeat;
    color: white;
    text-align: center;
}

.main-nav {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 2rem 0;
    z-index: 10;
}

.nav-container {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    opacity: 1;
    text-decoration: underline;
    text-underline-offset: 8px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.6));
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    letter-spacing: 0.5px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 15px rgba(223, 30, 18, 0.3);
}

.btn-primary:hover {
    transform: scale(1.05);
    background-color: white;
    color: var(--accent-color);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

/* Stats Strip */
.stats-strip {
    background-color: #f8f9fa;
    padding: 3rem 0;
    border-bottom: 1px solid #eee;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

@media (max-width: 1000px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 600px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-item {
    text-align: center;
    padding: 1.2rem 0.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent-color);
    line-height: 1.1;
    margin-bottom: 0.5rem;
    white-space: nowrap;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Why Partner Section */
.why-partner h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.feature-card {
    padding: 2rem;
    border-radius: 20px;
    background: white;
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(223, 30, 18, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

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

/* Pricing Section */
.pricing {
    background-color: #fcfcfc;
}

.pricing-header {
    text-align: center;
    margin-bottom: 4rem;
}

.pricing-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid #eee;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    border-color: var(--accent-color);
    position: relative;
    transform: scale(1.05);
    box-shadow: var(--shadow-soft);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.package-desc {
    font-size: 0.95rem;
    color: var(--secondary-text);
    margin-bottom: 2rem;
    flex: 1;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 2rem;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--secondary-text);
}

.btn-outline {
    display: block;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background-color: var(--accent-color);
    color: white;
}

.pricing-card.popular .btn-outline {
    background-color: var(--accent-color);
    color: white;
}

/* How It Works */
.how-it-works h2 {
    text-align: center;
    margin-bottom: 4rem;
    font-size: 2.5rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step h3 {
    margin-bottom: 1rem;
}

/* Footer & Guidelines */
.contact-footer {
    padding: 4rem 0;
    background: #1a1a1a;
    color: white;
    text-align: center;
}

.guidelines {
    max-width: 800px;
    margin: 0 auto 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

.guidelines p {
    font-style: italic;
    font-size: 0.95rem;
    opacity: 0.8;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

/* Responsiveness */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .pricing-card.popular {
        transform: scale(1);
    }

    section {
        padding: 3rem 0;
    }
}