:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #111111;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --accent-blue: #00f3ff;
    --accent-purple: #bc13fe;
    --accent-pink: #ff00ff;
    --gradient-main: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-purple);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Nav */
header {
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    background: var(--gradient-main);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: linear-gradient(rgba(10, 10, 10, 0.6), rgba(10, 10, 10, 1)), url('../images/hero.png') no-repeat center center/cover;
    padding-top: 80px;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff, #a0a0a0);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--accent-blue);
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 40px;
    color: var(--text-secondary);
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--gradient-main);
    color: white;
    font-weight: 700;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(188, 19, 254, 0.3);
    color: white;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 60px;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-purple);
    margin: 20px auto 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.card {
    background: var(--secondary-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s, border-color 0.3s;
}

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

.card h3 {
    color: var(--accent-blue);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

/* Comparison Utility */
.reality-bridge {
    margin-top: 20px;
}

.reality {
    border-left: 3px solid #ff4444;
    padding: 15px;
    background: rgba(255, 68, 68, 0.1);
    margin-bottom: 10px;
    border-radius: 0 10px 10px 0;
}

.bridge {
    border-left: 3px solid var(--accent-blue);
    padding: 15px;
    background: rgba(0, 243, 255, 0.1);
    border-radius: 0 10px 10px 0;
}

strong {
    color: white;
}

/* Footer */
footer {
    background: var(--secondary-bg);
    padding: 60px 0 20px;
    margin-top: 100px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.copyright {
    text-align: center;
    color: #666;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-2 {
    margin-bottom: 20px;
}

.mb-4 {
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}
/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: rgba(10, 10, 10, 0.95);
    min-width: 200px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.5);
    z-index: 1001;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    backdrop-filter: blur(10px);
    top: 100%;
    left: 0;
    padding: 10px 0;
}

.dropdown-content a {
    color: var(--text-secondary);
    padding: 12px 20px;
    text-decoration: none;
    display: block;
    font-size: 0.9rem;
    letter-spacing: normal;
    font-weight: 400;
    text-transform: capitalize;
}

.dropdown-content a:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--accent-blue);
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Program Layout Grid */
.program-layout-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 40px;
}

.tech-stack-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.tech-stack-column .card {
    padding: 30px;
    height: auto;
}

.tech-stack-column .card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.tech-stack-column .card p {
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .program-layout-grid {
        grid-template-columns: 1fr;
    }

    .tech-stack-column {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* Language Selector */
.lang-selector-wrapper {
    display: flex;
    align-items: center;
    margin-left: 15px;
}

#lang-selector {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.3s, color 0.3s;
}

#lang-selector:hover,
#lang-selector:focus {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

#lang-selector option {
    background: var(--primary-bg);
    color: var(--text-primary);
}