:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --secondary: #a855f7;
    --background: #ffffff;
    --bg-accent: #f8fafc;
    --surface: rgba(255, 255, 255, 0.7);
    --surface-solid: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --glass-border: rgba(0, 0, 0, 0.05);
    --primary-glow: rgba(99, 102, 241, 0.15);
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
    --card-shadow-hover: 0 20px 40px -12px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    scroll-behavior: smooth;
}

h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    color: var(--text);
    letter-spacing: -0.02em;
}

body {
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    background-image:
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.03) 0, transparent 50%),
        radial-gradient(at 50% 0%, rgba(168, 85, 247, 0.03) 0, transparent 50%),
        radial-gradient(at 100% 0%, rgba(99, 102, 241, 0.03) 0, transparent 50%);
}

.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    filter: blur(140px);
    border-radius: 50%;
    opacity: 0.18;
    animation: move 25s infinite alternate ease-in-out;
}

.blob-1 {
    top: -200px;
    right: -100px;
}

.blob-2 {
    bottom: -200px;
    left: -100px;
    animation-delay: -7s;
}

.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: 
        linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, black, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black, transparent 80%);
}

@keyframes move {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(150px, 150px) scale(1.2); }
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
nav {
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 1rem;
    z-index: 1000;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.05);
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text);
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo span {
    background: linear-gradient(135deg, var(--text) 30%, var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }

.btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 30px var(--primary-glow);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--primary-glow);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
    pointer-events: none;
    transform: none !important;
    box-shadow: none !important;
}

/* Section Cards Style */
.card-wrapper {
    padding: 120px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.registration-card {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    padding: 3.5rem 2.5rem;
    border-radius: 32px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.registration-card h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.registration-card p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 2.5rem;
}

.tos-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.tos-container input { width: 18px; height: 18px; cursor: pointer; }
.tos-container label { color: var(--text-muted); cursor: pointer; }
.tos-container a { color: var(--primary); text-decoration: none; font-weight: 600; }

.credential-box {
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

.credential-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.credential-value {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--text);
    word-break: break-all;
}

.warning-box {
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: 1.25rem;
    border-radius: 16px;
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

/* Footer */
footer {
    padding: 100px 0 60px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 4rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: left;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 320px;
    line-height: 1.6;
}

.footer-col { text-align: left; }
.footer-col h4 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(6px);
}

.social-stack a svg { width: 22px; height: 22px; }
.footer-links a:hover svg { transform: scale(1.1); color: var(--primary); }

/* Hamburger & Mobile Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(7px, 7px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.mobile-menu.active { opacity: 1; pointer-events: all; }
.mobile-menu a {
    font-size: 1.5rem;
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

/* Responsive */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-links, nav .btn { display: none; }
    .container { padding: 0 1.25rem; }
    .card-wrapper { padding: 60px 0; }
    footer { padding: 60px 0 40px !important; }
}

@media (max-width: 640px) {
    .footer-grid { grid-template-columns: 1fr; gap: 3rem; text-align: center; }
    .footer-brand, .footer-col { align-items: center; text-align: center; }
    .footer-links a { justify-content: center; }
}