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

:root {
    --color-bg-start: #1e293b;
    --color-bg-end: #0f172a;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-heading: #f8fafc;
    --color-primary: #2563eb;
    --color-primary-light: #60a5fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.6;
}

.container {
    text-align: center;
    padding: 2rem;
    max-width: 600px;
}

.logo svg {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-heading);
}

.tagline {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.badge {
    display: inline-block;
    background: var(--color-primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.description {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    max-width: 45ch;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    background: transparent;
    color: var(--color-primary-light);
    border: 2px solid var(--color-primary);
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.btn:hover,
.btn:focus {
    background: var(--color-primary);
    color: white;
    outline: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}