:root {
    color-scheme: dark;
    --bg: #0a0c11;
    --line: #273041;
    --text: #f5f7fb;
    --muted: #919bad;
    --danger: #ff777f;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 20px;
    font-family:
        Inter, ui-sans-serif, system-ui, -apple-system,
        BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 50% 0%, #18203a 0%, transparent 35%),
        var(--bg);
}

.login-shell {
    width: min(420px, 100%);
}

.login-card {
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 30px;
    background:
        linear-gradient(145deg, rgba(25,31,44,.97), rgba(14,17,24,.99));
    box-shadow: 0 30px 80px rgba(0,0,0,.35);
}

.brand-mark {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    margin-bottom: 22px;
    border-radius: 14px;
    background: linear-gradient(145deg, #8ba0ff, #4c5f9d);
    font-size: 20px;
    font-weight: 800;
}

.eyebrow {
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .12em;
}

h1 {
    margin: 7px 0 0;
    font-size: 29px;
    letter-spacing: -.04em;
}

.lead {
    margin: 7px 0 24px;
    color: var(--muted);
    font-size: 13px;
}

form {
    display: grid;
    gap: 15px;
}

label span {
    display: block;
    margin-bottom: 7px;
    color: #bcc4d2;
    font-size: 12px;
}

input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 11px;
    padding: 12px 13px;
    outline: none;
    background: #0b0f15;
    color: var(--text);
}

input:focus {
    border-color: #6279bb;
}

button {
    margin-top: 4px;
    border: 1px solid #536aa9;
    border-radius: 11px;
    padding: 12px 14px;
    background: #26365e;
    color: white;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

button:disabled {
    cursor: wait;
    opacity: .6;
}

.error {
    border: 1px solid #66383d;
    border-radius: 10px;
    padding: 10px 12px;
    background: #2b171b;
    color: var(--danger);
    font-size: 12px;
}