:root {
    --ink: #fbfdff;
    --muted: #cfe2f6;
    --surface: rgba(10, 31, 45, 0.88);
    --line: rgba(255, 255, 255, 0.32);
    --accent: #daf6ff;
    --accent-hover: #a2eddd;
    --accent-ink: #07100e;
    --error: #ffaaa5;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
}

* {
    box-sizing: border-box;
}

body {
    display: grid;
    min-height: 100vh;
    margin: 0;
    padding: 1.5rem;
    place-items: center;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 20%, rgba(48, 105, 133, 0.3), transparent 42%),
        radial-gradient(circle at 82% 72%, rgba(118, 72, 151, 0.26), transparent 48%),
        linear-gradient(125deg, #010a11 0%, #07141e 45%, #102c3b 100%);
    font-family: "Oxygen Mono", monospace;
    line-height: 1.6;
}

.auth-container {
    width: min(100%, 30rem);
}

.auth-card {
    padding: clamp(1.5rem, 5vw, 3rem);
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

h1 {
    margin: 0;
    font-size: clamp(1.6rem, 5vw, 2.2rem);
    font-weight: 400;
}

.subtitle {
    margin: 0.5rem 0 2rem;
    color: var(--muted);
}

.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    margin-bottom: 0.4rem;
}

input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--line);
    color: var(--ink);
    background: rgba(1, 10, 17, 0.72);
    font: inherit;
}

input:focus {
    outline: 2px solid rgba(218, 246, 255, 0.45);
    outline-offset: 2px;
}

button,
.button-link {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1rem;
    border: 0;
    color: var(--accent-ink);
    background: var(--accent);
    font: inherit;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
}

button:hover,
.button-link:hover {
    background: var(--accent-hover);
}

.auth-link {
    margin: 1.5rem 0 0;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    text-align: center;
}

a {
    color: var(--accent);
}

.help-text {
    margin-top: 0.4rem;
    color: var(--muted);
    font-size: 0.75rem;
}

.errorlist {
    margin: 0.4rem 0 0;
    padding: 0;
    color: var(--error);
    list-style: none;
    font-size: 0.8rem;
}

.alert {
    margin-bottom: 1rem;
    color: var(--error);
}