:root {
    --auth-bg-start: #0f2a43;
    --auth-bg-end: #071b2f;
    --surface: rgba(255, 255, 255, 0.94);
    --surface-border: rgba(148, 163, 184, 0.25);
    --heading: #0f172a;
    --text: #334155;
    --muted: #64748b;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
    --focus: rgba(14, 165, 233, 0.2);
    --link: #0f6ab5;
}

* {
    box-sizing: border-box;
}

body.auth-page {
    margin: 0;
    min-height: 100vh;
    font-family: "Plus Jakarta Sans", "Poppins", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 16%, rgba(56, 189, 248, 0.22), transparent 30%),
        radial-gradient(circle at 85% 4%, rgba(14, 165, 233, 0.16), transparent 35%),
        linear-gradient(140deg, var(--auth-bg-start), var(--auth-bg-end));
}

.auth-shell {
    min-height: 100vh;
    padding: 28px 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: min(100%, 460px);
    padding: 30px;
    border-radius: 22px;
    border: 1px solid var(--surface-border);
    background: var(--surface);
    box-shadow: 0 28px 70px rgba(2, 6, 23, 0.35);
}

.auth-badge {
    width: fit-content;
    margin: 0 0 12px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #0b63a6;
    background: rgba(14, 165, 233, 0.12);
}

.auth-title {
    margin: 0;
    font-size: 29px;
    line-height: 1.18;
    color: var(--heading);
}

.auth-muted {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.auth-form {
    margin-top: 24px;
    display: grid;
    gap: 14px;
}

.auth-field {
    display: grid;
    gap: 8px;
}

.auth-field label {
    color: #1e293b;
    font-size: 13px;
    font-weight: 700;
}

.auth-row {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 10px;
}

.auth-input,
.auth-select {
    width: 100%;
    border-radius: 12px;
    border: 1px solid #cbd5e1;
    padding: 11px 12px;
    font-size: 15px;
    color: #0f172a;
    background: #fff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.auth-input::placeholder {
    color: #94a3b8;
}

.auth-input:focus,
.auth-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--focus);
}

.auth-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #334155;
}

.auth-checkbox input {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

.auth-btn {
    width: 100%;
    border: 0;
    border-radius: 12px;
    padding: 12px;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(120deg, var(--accent), var(--accent-hover));
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.auth-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 20px rgba(14, 165, 233, 0.3);
}

.auth-footnote {
    margin: 10px 0 0;
    text-align: center;
    font-size: 14px;
    color: #475569;
}

.auth-link {
    color: var(--link);
    text-decoration: none;
    font-weight: 700;
}

.auth-link:hover {
    text-decoration: underline;
}

.auth-actions {
    margin-top: 4px;
    display: grid;
    gap: 14px;
}

.auth-alert {
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid #fecaca;
    background: #fef2f2;
    color: #b91c1c;
    font-size: 14px;
}

.auth-alert ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 6px;
}

.auth-error {
    margin-top: 2px;
    font-size: 12px;
    color: #b91c1c;
}

.admin-theme {
    --auth-bg-start: #201647;
    --auth-bg-end: #0f1232;
    --accent: #22c55e;
    --accent-hover: #16a34a;
    --focus: rgba(34, 197, 94, 0.18);
    --link: #166534;
}

@media (max-width: 640px) {
    .auth-card {
        border-radius: 18px;
        padding: 24px 18px;
    }

    .auth-row {
        grid-template-columns: 1fr;
    }

    .auth-title {
        font-size: 25px;
    }
}