@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-bg: #0b0e14;
    --secondary-bg: #151921;
    --accent: #13d8aa;
    --accent-glow: rgba(19, 216, 170, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --gradient-primary: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    --gradient-accent: linear-gradient(90deg, #13d8aa, #00b09b);
    --shadow-neon: 0 0 15px var(--accent-glow);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.section-padding {
    padding: 100px 0;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #000;
    box-shadow: var(--shadow-neon);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 25px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-outline:hover {
    background: var(--accent);
    color: #000;
}

/* --- Glassmorphism --- */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

/* --- Navbar --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

header.scrolled {
    background: rgba(11, 14, 20, 0.8);
    backdrop-filter: blur(15px);
    padding: 15px 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 30px;
}

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

/* --- Hero Section --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 70% 30%, rgba(0, 247, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 10% 80%, rgba(48, 43, 99, 0.2) 0%, transparent 50%);
    position: relative;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.hero-btns {
    display: flex;
    gap: 20px;
}

/* --- Course Cards --- */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.course-card {
    transition: var(--transition);
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.course-thumb {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.course-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.course-card:hover .course-thumb img {
    transform: scale(1.1);
}

.course-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--accent);
    color: #000;
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 0.8rem;
    font-weight: 700;
}

.course-body {
    padding: 25px;
    flex-grow: 1;
}

.course-cat {
    color: var(--accent);
    font-size: 0.9rem;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 10px;
}

.course-title {
    font-size: 1.25rem;
    margin-bottom: 15px;
    line-height: 1.4;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 15px;
}

.course-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.course-price .old-price {
    font-size: 1rem;
    color: var(--text-secondary);
    text-decoration: line-through;
    margin-right: 10px;
}

/* --- Features Section --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 40px;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--glass-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: var(--accent);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.feature-item:hover .feature-icon {
    background: var(--accent);
    color: #000;
    box-shadow: var(--shadow-neon);
}

/* --- FAQ Section --- */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
}

.faq-header {
    padding: 20px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-header h4 {
    font-size: 1.1rem;
}

.faq-content {
    padding: 0 25px 20px;
    color: var(--text-secondary);
    display: none;
}

.faq-item.active .faq-content {
    display: block;
}

.faq-item.active .faq-header i {
    transform: rotate(180deg);
}

/* --- Footer --- */
footer {
    background: var(--secondary-bg);
    padding: 80px 0 30px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.footer-desc {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.footer-links h4 {
    margin-bottom: 25px;
    color: var(--accent);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    max-width: 500px;
    width: 100%;
    padding: 40px;
    position: relative;
    animation: modalSlide 0.4s ease forwards;
}

@keyframes modalSlide {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
}

.close-modal:hover {
    color: var(--accent);
}

/* --- Forms --- */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 10px rgba(0, 247, 255, 0.1);
}

select.form-control option {
    background: var(--secondary-bg);
    color: #fff;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero h1 { font-size: 3rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    header { padding: 15px 0; }
    .nav-links { display: none; }
    .hero h1 { font-size: 2.5rem; }
    .section-padding { padding: 60px 0; }
    .features-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-up {
    animation: fadeInUp 0.8s ease forwards;
}