:root {
    color-scheme: light;
    --ink: #0f172a;
    --muted: #667085;
    --accent: #111827;
    --paper: #f5f6fb;
    --line: #e5e7eb;
}

* {
    box-sizing: border-box;
    font-family: 'Space Grotesk', sans-serif;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--paper);
    color: var(--ink);
}

.login-bg {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 18% 12%, rgba(17, 24, 39, 0.08), transparent 55%),
        radial-gradient(circle at 80% 0%, rgba(17, 24, 39, 0.06), transparent 55%);
    pointer-events: none;
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px 16px;
    position: relative;
    z-index: 2;
}

.login-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    background: #fff;
    border: 1px solid var(--line);
    padding: 24px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.1);
    border-radius: 18px;
}

.login-brand {
    display: grid;
    gap: 14px;
    align-content: start;
}

.brand-mark {
    width: 56px;
    height: 56px;
    border: 1px solid var(--line);
    display: grid;
    place-items: center;
    background: #fff;
    border-radius: 16px;
    font-weight: 700;
    font-size: 16px;
    color: var(--ink);
}

.brand-title {
    font-size: 1.05rem;
    font-weight: 700;
}

.brand-subtitle {
    font-size: 0.85rem;
    color: var(--muted);
}

.brand-note {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.5;
}

.login-form {
    display: grid;
    gap: 12px;
    align-content: start;
}

.form-title {
    font-size: 1.05rem;
    font-weight: 600;
}

.form-subtitle {
    font-size: 0.9rem;
    color: var(--muted);
}

.form-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--muted);
    margin-top: 6px;
}

.form-input {
    border: 1px solid var(--line);
    padding: 10px 12px;
    font-size: 1rem;
    background: #fff;
    border-radius: 12px;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.15);
}

.form-button {
    margin-top: 8px;
    border: 1px solid var(--accent);
    background: var(--accent);
    color: #fff;
    padding: 10px 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    cursor: pointer;
    border-radius: 12px;
}

.form-button:hover {
    background: #0b1220;
}

.form-hint {
    font-size: 0.85rem;
    color: var(--muted);
}

.form-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid rgba(153, 27, 27, 0.2);
    padding: 10px 12px;
    font-size: 0.9rem;
    border-radius: 12px;
}

@media (max-width: 480px) {
    .login-shell {
        padding: 16px;
    }
    .login-card {
        padding: 20px;
        border-radius: 14px;
    }
    .brand-mark {
        width: 48px;
        height: 48px;
        font-size: 14px;
        border-radius: 12px;
    }
    .form-input {
        padding: 12px;
        font-size: 16px;
    }
    .form-button {
        padding: 14px;
        font-size: 0.95rem;
    }
}