:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-white: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --error: #ef4444;
    --success: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background: radial-gradient(circle at top right, #1e293b, #0f172a);
    color: var(--text-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow-x: hidden;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
    width: 100%;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 20px;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--text-white);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--text-white);
    cursor: pointer;
}

/* Responsive Navbar */
@media (max-width: 768px) {
    .navbar-container {
        padding: 0 20px;
    }

    .mobile-menu-btn {
        display: block;
        z-index: 10000;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        transform: translateX(100%);
        width: 300px;
        height: 100vh;
        background: var(--bg-dark); /* or #000 */
        flex-direction: column;
        justify-content: flex-start;
        padding-top: 80px;
        transition: transform 0.3s ease-in-out;
        z-index: 9999;
        box-shadow: -5px 0 15px rgba(0,0,0,0.5);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
        padding: 15px 0;
    }
    
    .nav-menu a {
        justify-content: center;
        width: 100%;
        font-size: 1.2rem;
    }
}

.registration-container {
    width: 100%;
    max-width: 500px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.6s ease-out;
    margin: 40px auto; /* Center with margin */
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.header {
    text-align: center;
    margin-bottom: 32px;
}

.header h1 {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.header p {
    color: var(--text-muted);
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 12px 16px;
    color: white;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
    background: rgba(15, 23, 42, 0.8);
}

.payment-badge {
    background: rgba(56, 189, 248, 0.1);
    border: 1px dashed var(--accent);
    padding: 12px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 24px;
}

.payment-badge span {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.payment-badge strong {
    font-size: 24px;
    color: var(--accent);
}

.submit-btn {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.submit-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.submit-btn:active {
    transform: translateY(0);
}

.footer-text {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--text-muted);
}

/* Success Styles */
.success-card {
    text-align: center;
}

.success-icon {
    width: 64px;
    height: 64px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 24px;
}