:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-color: #38bdf8;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --selection-bg: rgba(56, 189, 248, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.1) 0, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(139, 92, 246, 0.1) 0, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 1rem;
}

.container {
    max-width: 800px;
    width: 100%;
    animation: fadeIn 0.8s ease-out;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

li {
    margin-bottom: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--glass-border);
}

.nav-link.active {
    color: var(--accent-color);
    background: rgba(56, 189, 248, 0.1);
    border-color: rgba(56, 189, 248, 0.2);
}

.footer {
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.btn-primary {
    display: inline-block;
    background: var(--accent-color);
    color: #000;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    transition: transform 0.2s;
    margin-top: 1rem;
}

.btn-primary:hover {
    transform: scale(1.05);
    background: #7dd3fc;
}

.btn-danger {
    display: inline-block;
    background: #ef4444;
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    transition: transform 0.2s;
    margin-top: 1rem;
}

.btn-danger:hover {
    transform: scale(1.05);
    background: #f87171;
}

::selection {
    background: var(--selection-bg);
    color: var(--text-primary);
}