/* Sign-in / authentication pages. Self-contained, brand-forward look:
   a full-height gradient stage with a centered glass card. */

:root {
    --auth-bg-1: #4f46e5;
    --auth-bg-2: #0ea5e9;
    --auth-bg-3: #0d6efd;
    --auth-ink: #0f172a;
    --auth-muted: #64748b;
    --auth-card: #ffffff;
    --auth-border: #e2e8f0;
    --auth-accent: #4f46e5;
}

html, body {
    height: 100%;
}

body.auth-body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    font-family: "Segoe UI", Roboto, system-ui, -apple-system, Helvetica, Arial, sans-serif;
    color: var(--auth-ink);
    background: radial-gradient(1200px 600px at 10% -10%, rgba(255, 255, 255, 0.25), transparent 60%),
                radial-gradient(900px 500px at 110% 110%, rgba(255, 255, 255, 0.18), transparent 55%),
                linear-gradient(135deg, var(--auth-bg-1) 0%, var(--auth-bg-3) 45%, var(--auth-bg-2) 100%);
    background-attachment: fixed;
}

/* Soft decorative blobs behind the card */
.auth-stage {
    position: relative;
    width: 100%;
    max-width: 430px;
}

.auth-card {
    position: relative;
    background: var(--auth-card);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    box-shadow: 0 30px 60px -20px rgba(2, 6, 23, 0.45), 0 8px 20px -12px rgba(2, 6, 23, 0.3);
    padding: 2.25rem 2rem 2rem;
    backdrop-filter: blur(6px);
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}

.auth-logo {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    color: #fff;
    font-weight: 800;
    font-size: 1.25rem;
    background: linear-gradient(135deg, var(--auth-bg-1), var(--auth-bg-2));
    box-shadow: 0 6px 16px -6px rgba(79, 70, 229, 0.7);
}

.auth-brand-name {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}

.auth-title {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 0.25rem;
}

.auth-subtitle {
    color: var(--auth-muted);
    font-size: 0.95rem;
    margin: 0 0 1.5rem;
}

.auth-card .form-floating > .form-control {
    border-radius: 12px;
    border-color: var(--auth-border);
    padding-top: 1.625rem;
    padding-bottom: 0.5rem;
}

.auth-card .form-floating > .form-control:focus {
    border-color: var(--auth-accent);
    box-shadow: 0 0 0 0.2rem rgba(79, 70, 229, 0.15);
}

.auth-card .form-floating > label {
    color: var(--auth-muted);
}

.auth-submit {
    width: 100%;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--auth-bg-1), var(--auth-bg-3));
    box-shadow: 0 12px 24px -12px rgba(13, 110, 253, 0.8);
    transition: transform 0.06s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.auth-submit:hover {
    filter: brightness(1.05);
    box-shadow: 0 16px 30px -12px rgba(13, 110, 253, 0.9);
}

.auth-submit:active {
    transform: translateY(1px);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--auth-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 1.5rem 0 1rem;
}

.auth-divider::before,
.auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--auth-border);
}

.auth-external {
    display: grid;
    gap: 0.5rem;
}

.auth-external .btn {
    border-radius: 12px;
    padding: 0.6rem 1rem;
    font-weight: 500;
}

.auth-alert {
    border-radius: 12px;
    border: 1px solid #fecaca;
    background: #fef2f2;
    color: #b91c1c;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.auth-foot {
    margin-top: 1.5rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.8rem;
}

.auth-foot a {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 2px;
}

@media (max-width: 480px) {
    .auth-card {
        padding: 1.75rem 1.25rem;
    }
}