/* Standalone sign-in page. It loads only the shared font bundle, so the palette
   mirrors the WebUI tokens in index.css. */
:root {
    color-scheme: dark;
    --surface-0: #0b0b0d;
    --surface-1: #111114;
    --surface-2: #16161a;
    --line-1: #1f1f25;
    --line-2: #2a2a31;
    --line-3: #393941;
    --text-1: #ededf0;
    --text-2: #b4b4bc;
    --text-3: #85858e;
    --text-4: #5c5c65;
    --accent-1: #5b8cff;
    --accent-2: #c46fd4;
    --accent-mid: #8f7fe8;
    --gradient-accent: linear-gradient(120deg, var(--accent-1), var(--accent-2));
    --ring-accent: 0 0 0 3px color-mix(in srgb, var(--accent-mid) 26%, transparent);
    --danger: #ee7b7b;
    --shadow-lg: 0 2px 8px rgb(0 0 0 / 0.4), 0 32px 72px -18px rgb(0 0 0 / 0.8);
    --font-main: "iA Writer Quattro", ui-sans-serif, system-ui, sans-serif;
    --font-brand: "Space Mono", ui-monospace, monospace;
}

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

html,
body {
    height: 100%;
}

body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0;
    padding: 1.5rem 1rem;
    background: var(--surface-0);
    color: var(--text-1);
    font-family: var(--font-main);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

button,
input {
    font: inherit;
}

::selection {
    background: color-mix(in srgb, var(--accent-mid) 35%, transparent);
}

.login-shell {
    display: grid;
    justify-items: center;
    gap: 2rem;
    width: 100%;
    max-width: 22.5rem;
}

.logo {
    display: block;
    width: 7.25rem;
    height: auto;
}

.login-form {
    position: relative;
    display: grid;
    gap: 1rem;
    width: 100%;
    padding: 1.75rem 1.5rem 1.5rem;
    border: 1px solid var(--line-1);
    border-radius: 0.875rem;
    background: var(--surface-1);
    box-shadow: var(--shadow-lg);
}

/* A hairline of the brand gradient marks the top edge of the panel. */
.login-form::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 1.5rem;
    right: 1.5rem;
    height: 1px;
    background: var(--gradient-accent);
    opacity: 0.8;
}

.login-heading {
    margin-bottom: 0.25rem;
}

.login-heading h1 {
    margin: 0 0 0.25rem;
    font-size: 1.1875rem;
    font-weight: 700;
    line-height: 1.3;
}

.login-heading p {
    margin: 0;
    color: var(--text-3);
    font-size: 0.8125rem;
}

.input-group {
    display: grid;
    gap: 0.375rem;
}

.input-group label {
    color: var(--text-2);
    font-size: 0.8125rem;
}

.input-group input {
    width: 100%;
    min-height: 2.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--line-2);
    border-radius: 0.5rem;
    background: var(--surface-0);
    color: var(--text-1);
    font-size: 0.9375rem;
    outline: none;
    transition: border-color 0.18s ease;
}

.input-group input:hover:not(:focus) {
    border-color: var(--line-3);
}

/* Focus draws the brand gradient as the field border. */
.input-group input:focus {
    border-color: transparent;
    background:
        linear-gradient(var(--surface-0), var(--surface-0)) padding-box,
        var(--gradient-accent) border-box;
}

.input-group input:-webkit-autofill {
    -webkit-text-fill-color: var(--text-1);
    -webkit-box-shadow: 0 0 0 40px var(--surface-0) inset;
    caret-color: var(--text-1);
}

button[type="submit"] {
    width: 100%;
    min-height: 2.5rem;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    border: 0;
    border-radius: 0.5rem;
    background: var(--text-1);
    color: var(--surface-0);
    font-size: 0.9375rem;
    cursor: pointer;
    transition: color 0.18s ease, transform 0.12s ease;
}

button[type="submit"]:hover {
    background: var(--gradient-accent);
    color: #fff;
}

button[type="submit"]:active {
    transform: scale(0.99);
}

button[type="submit"]:focus-visible {
    outline: none;
    box-shadow: var(--ring-accent);
}

.error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0.5rem 0.75rem;
    border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
    border-radius: 0.5rem;
    background: color-mix(in srgb, var(--danger) 8%, transparent);
    color: var(--danger);
    font-size: 0.8125rem;
}

@media (prefers-reduced-motion: reduce) {
    button[type="submit"],
    .input-group input {
        transition: none;
    }
}