:root {
    --primary: #00f2ff;
    --secondary: #7000ff;
    --accent: #ff00c8;
    --bg-dark: #05060a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --text-main: #e0e0e0;
    --text-dim: #a0a0a0;
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-height: 80px;
}


/* Custom Scrollbar Design */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #05060a;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2); /* Slightly more visible */
    border-radius: 20px;
    border: 2px solid #05060a;
    transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 242, 255, 0.5); /* Primary glow on hover */
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) #05060a;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    filter: blur(80px);
}

.blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
    animation: float 20s infinite alternate ease-in-out;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: var(--secondary);
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 40vw;
    height: 40vw;
    background: var(--primary);
}

.blob-3 {
    top: 30%;
    right: 20%;
    width: 30vw;
    height: 30vw;
    background: var(--accent);
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 100px) scale(1.1); }
}

/* Navbar */
.navbar {
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    background: rgba(5, 6, 10, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 48px;
    width: auto;
    transition: var(--transition);
}

.logo:hover img {
    transform: scale(1.05);
    filter: drop-shadow(0 0 15px rgba(255, 0, 0, 0.5));
}

.logo-text {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #fff;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dim);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: #fff;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary);
}

.nav-actions {
    display: flex;
    gap: 15px;
}

.btn-glass {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 10px 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-premium {
    background: white;
    color: var(--bg-dark);
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(255, 255, 255, 0.2);
}

.btn-gold {
    background: linear-gradient(135deg, #ffc107, #ff8c00);
    color: #000;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 800;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(255, 193, 7, 0.2);
}

.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(255, 193, 7, 0.4);
}

.btn-white {
    background: #fff;
    color: #000;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(255, 255, 255, 0.2);
}

.btn-white i {
    font-size: 1.1rem;
}

/* User Profile & Auth */
.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 5px 15px 5px 5px;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.user-profile:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.user-profile img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--primary);
    object-fit: cover;
}

.user-profile span {
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
}

#logout-menu {
    position: absolute;
    top: 70px;
    right: 5%;
    background: rgba(15, 16, 22, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 10px;
    min-width: 150px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    z-index: 1001;
    display: none;
    flex-direction: column;
    gap: 5px;
}

#logout-menu.show {
    display: flex;
}

.logout-item {
    padding: 10px 15px;
    color: #94a3b8;
    font-size: 0.85rem;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    border: none;
    background: transparent;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logout-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.logout-item.danger:hover {
    background: rgba(255, 0, 0, 0.1);
    color: #ff4d4d;
}

/* Hero Section */
.hero {
    padding: 8rem 5% 6rem 5%;
    text-align: center;
}

.hero-title {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 2rem;
    letter-spacing: -2px;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(to right, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-dim);
    max-width: 700px;
    margin: 0 auto 3rem auto;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
}

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

/* Course Sections */
.course-section {
    padding: 4rem 5% 6rem 5%;
}

.section-header {
    margin-bottom: 3rem;
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.section-desc {
    color: var(--text-dim);
    font-size: 1.1rem;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.course-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.course-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 242, 255, 0.4);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}

.course-card.active {
    border-color: var(--primary);
    background: rgba(0, 242, 255, 0.03);
}

.course-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary);
    transition: var(--transition);
}

.course-card:hover .course-icon {
    background: var(--primary);
    color: var(--bg-dark);
}

.course-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.course-info {
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 25px;
    flex: 1;
}

.course-tag {
    font-size: 0.8rem;
    font-weight: 700;
    color: #fff;
    padding: 6px 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50px;
    display: inline-block;
    align-self: flex-start;
}

.status-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    background: var(--primary);
    color: var(--bg-dark);
    padding: 4px 10px;
    border-radius: 5px;
}

.course-card.locked {
    opacity: 0.6;
    cursor: default;
}

.course-card.locked:hover {
    transform: none;
}

/* Footer */
.main-footer {
    padding: 6rem 5% 3rem 5%;
    border-top: 1px solid var(--glass-border);
    margin-top: 4rem;
    text-align: center;
}

.footer-content {
    margin-bottom: 3rem;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 2rem;
}

.social-links a {
    color: var(--text-dim);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* Search & Feedback */
.search-wrapper { display: flex; align-items: center; gap: 8px; }
.search-bar { 
    background: var(--bg-card); 
    border: 1px solid var(--glass-border); 
    border-radius: 8px; 
    width: 0; 
    overflow: hidden; 
    transition: var(--transition); 
    opacity: 0; 
}
.search-bar.active { width: 180px; opacity: 1; padding: 0 10px; }
.search-bar input { 
    background: transparent; border: none; color: #fff; padding: 8px 0; outline: none; width: 100%; font-size: 0.85rem; 
}
#toast-container { position: fixed; bottom: 30px; right: 30px; z-index: 99999; pointer-events: none; }
.toast {
    background: rgba(15, 16, 22, 0.9); backdrop-filter: blur(15px); border: 1px solid var(--glass-border); 
    border-left: 4px solid var(--primary); padding: 12px 20px; border-radius: 8px; color: #fff; 
    font-size: 0.9rem; font-weight: 600; box-shadow: 0 10px 30px rgba(0,0,0,0.5); 
    margin-top: 10px; transform: translateX(120%); transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: auto;
}
.toast.show { transform: translateX(0); }
.course-card.hidden { display: none !important; }
/* Animations & reveal */
.scroll-init {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.reveal {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

.course-card.scroll-init {
    transition-delay: calc(0.1s * var(--order, 1));
}

/* Media Queries for Mobile Responsiveness */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }
    .hero-stats {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .navbar {
        height: auto;
        padding: 15px 5%;
        flex-wrap: wrap;
    }

    .logo img {
        height: 36px;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(5, 6, 10, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 0;
        gap: 0;
        border-bottom: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
    }

    .nav-links.active {
        max-height: 400px;
        padding: 10px 5% 20px 5%;
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links a {
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        font-size: 1.1rem;
    }

    .nav-links a.active::after {
        display: none;
    }
    
    .nav-links a.active {
        color: var(--primary);
    }

    .mobile-toggle {
        display: block !important;
        margin-left: 5px;
    }

    .btn-gold {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .hero {
        padding: 5rem 5% 3rem 5%;
    }

    .hero-title {
        font-size: 2.8rem;
        margin-bottom: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
        margin-bottom: 2rem;
    }

    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 20px;
        justify-content: space-around;
        width: 100%;
    }
    
    .stat-item {
        align-items: center;
        flex: 1 1 30%;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .course-section {
        padding: 3rem 5% 3rem 5%;
    }

    .section-title {
        font-size: 2rem;
    }

    .course-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .course-card {
        padding: 20px;
    }

    .main-footer {
        padding: 4rem 5% 2rem 5%;
        margin-top: 2rem;
    }
    
    #premium-modal > div {
        padding: 2rem 1.5rem !important;
    }
    
    #premium-modal h2 {
        font-size: 1.6rem !important;
    }
}

@media (max-width: 480px) {
    .logo-text {
        display: none;
    }

    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-bar.active {
        width: 130px;
    }
}