:root {
    --bg: #0a0a0a;
    --card-bg: #121212;
    --border: #1f1f1f;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent: #ffffff;
    --accent-muted: #27272a;
    --font: 'Inter', -apple-system, system-ui, sans-serif;
}

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

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 440px;
    padding: 2rem;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

header {
    margin-bottom: 2.5rem;
    display: flex;
    justify-content: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
}

.loader-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
}

.loader-bar {
    height: 100%;
    width: 30%;
    background: var(--accent);
    animation: loading 2s infinite ease-in-out;
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(400%); }
}

.content h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.content p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2.5rem;
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background-color: #e4e4e7;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--accent-muted);
    border-color: #3f3f46;
    transform: translateY(-1px);
}

footer {
    margin-top: 2.5rem;
    text-align: center;
}

footer p {
    font-size: 0.75rem;
    color: #52525b;
    letter-spacing: 0.02em;
}

@media (max-width: 400px) {
    .button-group {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 2rem 1.5rem;
    }
}