:root {
    --bg1: #0b1020;
    --bg2: #070a12;
    --card: #0f172a;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --btn: #111827;
    --btnHover: #1f2937;
    --border: rgba(255, 255, 255, .10);
    --shadow: 0 18px 50px rgba(0, 0, 0, .45);
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
    color: var(--text);
    background:
        radial-gradient(1200px 600px at 20% 10%, rgba(99, 102, 241, .20), transparent 60%),
        radial-gradient(1000px 500px at 80% 20%, rgba(16, 185, 129, .14), transparent 60%),
        linear-gradient(180deg, var(--bg1), var(--bg2));
    display: grid;
    place-items: center;
    padding: 24px;
}

.card {
    width: min(520px, 100%);
    background: rgba(15, 23, 42, .72);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    padding: 26px;
}

.header {
    text-align: center;
    padding: 8px 4px 18px;
}

.avatar {
    width: 84px;
    height: 84px;
    margin: 0 auto 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .20), transparent 60%),
        linear-gradient(135deg, rgba(99, 102, 241, .55), rgba(16, 185, 129, .35));
}

h1 {
    margin: 0;
    font-size: 1.35rem;
    letter-spacing: .2px;
}

.subtitle {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: .95rem;
    line-height: 1.35rem;
}

.links {
    display: grid;
    gap: 12px;
    padding: 10px 0 6px;
}

.btn {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-decoration: none;
    color: var(--text);
    background: rgba(17, 24, 39, .55);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px 14px;
    transition: transform .12s ease, background .12s ease, border-color .12s ease;
}

.btn:hover {
    transform: translateY(-1px);
    background: rgba(31, 41, 55, .70);
    border-color: rgba(255, 255, 255, .18);
}

.btn:active {
    transform: translateY(0px);
}

.hint {
    color: var(--muted);
    font-size: .85rem;
}

.btn.ghost {
    background: transparent;
}

.footer {
    text-align: center;
    padding-top: 14px;
    color: var(--muted);
}