:root {
    --bg: #0f172a;
    --card: #1e293b;
    --neon: #06b6d4;
    /* Cyan neon */
    --neon-hover: #0891b2;
    --white: #f8fafc;
    --font-head: 'Teko', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--white);
    font-family: var(--font-body);
    line-height: 1.6;
}

h1,
h2,
h3 {
    font-family: var(--font-head);
    text-transform: uppercase;
    margin: 0 0 1rem;
    letter-spacing: 1px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-neon {
    color: var(--neon);
}

/* Nav */
.navbar {
    padding: 20px 0;
    background: rgba(15, 23, 42, 0.9);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 2rem;
    font-family: var(--font-head);
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    font-style: italic;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links a {
    color: #ccc;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    transition: 0.3s;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    transition: 0.3s;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
}

.btn-neon {
    background: var(--neon);
    color: #000;
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

.btn-neon:hover {
    background: var(--neon-hover);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.8);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.btn-link {
    color: var(--neon);
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
}

/* Hero */
.hero {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(45deg, #0f172a 0%, #1e293b 100%);
    overflow: hidden;
    clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.hero h1 {
    font-size: 6rem;
    line-height: 0.9;
    font-style: italic;
    margin-bottom: 20px;
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.2rem;
    color: #94a3b8;
    margin-bottom: 40px;
}

/* Stats */
.stats {
    padding: 60px 0;
    background: var(--card);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    color: var(--neon);
    margin: 0;
    line-height: 1;
}

.stat-item p {
    margin: 0;
    font-weight: 700;
    text-transform: uppercase;
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Classes */
.classes {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

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

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.class-card {
    background: var(--card);
    border-radius: 8px;
    overflow: hidden;
    transition: 0.3s;
    border: 1px solid #334155;
    position: relative;
}

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

.class-bg {
    height: 200px;
}

.class-content {
    padding: 30px;
}

.class-content h3 {
    font-size: 1.5rem;
}

.class-content p {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* BMI */
.bmi-calc {
    padding: 80px 0;
    background: var(--card);
    margin-top: 50px;
    clip-path: polygon(0 15%, 100% 0, 100% 100%, 0 100%);
}

.bmi-form {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 30px;
    flex-wrap: wrap;
}

.bmi-form input {
    padding: 15px;
    background: #0f172a;
    border: 1px solid #334155;
    color: #fff;
    border-radius: 4px;
    min-width: 200px;
}

/* Footer */
.footer {
    padding: 60px 0;
    border-top: 1px solid #334155;
    margin-top: 0;
    background: #0b1120;
}

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

.footer-logo {
    font-family: var(--font-head);
    font-size: 2rem;
    font-weight: 700;
    font-style: italic;
}

.footer-links a {
    color: #94a3b8;
    margin-left: 20px;
    text-decoration: none;
    font-weight: 600;
}

.copy {
    text-align: center;
    color: #475569;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
    }

    .nav-links {
        margin-top: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 3.5rem;
    }
}