:root {
    --bg-top: #f5f7fa;
    --bg-bottom: #e9edf3;
    --card-bg: #ffffff;
    --text-primary: #1a1d23;
    --text-secondary: #5b6472;
    --accent: #4f5bd5;
    --border: #e7e9ee;
    --shadow: rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
    color: var(--text-primary);
}

.card {
    width: 100%;
    max-width: 440px;
    background: var(--card-bg);
    border-radius: 20px;
    padding: 48px 40px;
    text-align: center;
    box-shadow: 0 20px 50px var(--shadow), 0 2px 6px var(--shadow);
    border: 1px solid var(--border);
}

.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    margin-bottom: 24px;
    color: var(--accent);
    background: rgba(79, 91, 213, 0.08);
}

h1 {
    margin: 0 0 12px;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.message {
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.divider {
    height: 1px;
    background: var(--border);
    margin: 28px 0 20px;
}

.footnote {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.8;
}