:root {
    --primary: #a435f0;
    --dark: #2d2f31;
    --light: #f7f9fa;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: white;
    color: var(--dark);
    line-height: 1.6;
}

/* Navbar & Logo */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    background: white;
    z-index: 1000;
}

.logo-container { display: flex; align-items: center; gap: 15px; }

.logo { height: 120px; width: auto; }

.brand-name {
    font-weight: bold;
    font-size: 1.4rem;
    color: var(--primary);
}

.search-container { flex-grow: 1; margin: 0 30px; }

#searchBar {
    width: 100%;
    padding: 12px 20px;
    border-radius: 25px;
    border: 1px solid #d1d7dc;
    background-color: var(--light);
    outline: none;
}

/* Hero Section */
.hero {
    background: var(--dark);
    color: white;
    padding: 60px 5%;
    text-align: left;
    margin-bottom: 40px;
}

/* Course Grid */
.container { padding: 0 5%; }

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

/* Individual Card */
.course-card {
    border: 1px solid #d1d7dc;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.course-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.course-info { padding: 15px; flex-grow: 1; }

.course-info h3 { font-size: 1.1rem; margin-bottom: 8px; height: 45px; overflow: hidden; }

.instructor { font-size: 0.8rem; color: #6a6f73; }

.price { font-weight: bold; font-size: 1.2rem; margin-top: 10px; display: block; }

.enroll-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px;
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.2s;
}

.enroll-btn:hover { opacity: 0.9; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 15px; }
    .search-container { width: 100%; margin: 0; }
}