:root {
    --brand-start: #23265f;
    --brand-end: #076a94;
    --brand-gradient: linear-gradient(135deg, var(--brand-start), var(--brand-end));
    --brand-on-panel: rgba(255, 255, 255, .85);
    --brand-on-panel-faint: rgba(255, 255, 255, .65);
    --accent-tint: rgba(7, 106, 148, .15);
    --ink: #2e3192;
    --ink-soft: #4b515e;
    --ink-faint: #8a9099;
    --border: #dfe2ec;
    --danger: #b3261e;
    --danger-tint: #fbeceb;
    --success: #1a9c6a;
    --success-tint: #e7f7f1;
}

* { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
}

body.auth-body {
    font-family: "Montserrat", "Segoe UI", Arial, sans-serif;
    color: var(--ink-soft);
    background: #fff;
}

.auth-shell {
    min-height: 100vh;
    display: flex;
}

/* ---------- brand panel ---------- */
.brand-panel {
    flex: 0 0 42%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 56px 48px;
    background: var(--brand-start);
    background-image:
        radial-gradient(700px 460px at 88% -10%, rgba(255, 255, 255, .14), rgba(255, 255, 255, 0) 60%),
        var(--brand-gradient);
    color: var(--brand-on-panel);
    overflow: hidden;
}

.brand-logo {
    width: 200px;
    height: auto;
    display: block;
}

.brand-copy h1 {
    font-family: "Montserrat", "Segoe UI", Arial, sans-serif;
    font-weight: 700;
    font-size: clamp(26px, 2.6vw, 34px);
    color: #fff;
    margin: 0 0 14px;
    text-wrap: balance;
}

.brand-copy p {
    max-width: 40ch;
    font-size: 15px;
    line-height: 1.7;
    color: var(--brand-on-panel);
    margin: 0;
}

.brand-partners {
    margin-top: 28px;
}

.partners-label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--brand-on-panel-faint);
    margin-bottom: 10px;
}

.partners-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.partner-logo {
    height: 48px;
    width: auto;
    background: #fff;
    border-radius: 8px;
    padding: 8px 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .2);
}

.brand-foot {
    font-size: 12.5px;
    letter-spacing: .02em;
    color: var(--brand-on-panel-faint);
}

/* ---------- form panel ---------- */
.form-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
}

.form-card {
    width: 100%;
    max-width: 360px;
}

.form-card h2 {
    font-family: "Montserrat", "Segoe UI", Arial, sans-serif;
    font-weight: 700;
    font-size: 24px;
    color: var(--ink);
    margin: 0 0 6px;
}

.form-sub {
    font-size: 14.5px;
    color: var(--ink-faint);
    margin: 0 0 28px;
}

.field {
    margin-bottom: 18px;
}

.field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .01em;
    color: var(--ink);
    margin-bottom: 6px;
}

.field input {
    width: 100%;
    padding: 12px 14px;
    font-size: 16px;
    font-family: inherit;
    color: var(--ink);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.field input:focus {
    border-color: var(--brand-end);
    box-shadow: 0 0 0 3px var(--accent-tint);
}

.field input.input-validation-error {
    border-color: var(--danger);
}

.field-error {
    display: block;
    font-size: 12.5px;
    color: var(--danger);
    margin-top: 6px;
}

.validation-summary {
    background: var(--danger-tint);
    border: 1px solid rgba(179, 38, 30, .25);
    color: var(--danger);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 13.5px;
    margin-bottom: 20px;
}

.validation-summary-valid {
    display: none;
}

.validation-summary ul {
    margin: 0;
    padding-left: 18px;
}

.summary-banner {
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 13.5px;
    margin-bottom: 20px;
    line-height: 1.55;
}

.summary-banner.success {
    background: var(--success-tint);
    border: 1px solid rgba(26, 156, 106, .25);
    color: var(--success);
}

.summary-banner.info {
    background: var(--accent-tint);
    border: 1px solid rgba(7, 106, 148, .25);
    color: var(--ink);
}

.field-hint {
    display: block;
    font-size: 12px;
    color: var(--ink-faint);
    margin-top: 6px;
}

.field-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    row-gap: 10px;
    margin: -2px 0 20px;
    font-size: 13.5px;
}

.remember {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    color: var(--ink-soft);
    cursor: pointer;
    user-select: none;
}

.remember input[type="checkbox"] {
    width: 17px;
    height: 17px;
    accent-color: var(--ink);
    cursor: pointer;
}

.forgot-link {
    padding: 6px 0;
    color: var(--ink);
    font-weight: 500;
    text-decoration: none;
}

.forgot-link:hover,
.forgot-link:focus-visible {
    text-decoration: underline;
}

.btn-login {
    width: 100%;
    padding: 13px 18px;
    margin-top: 6px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .01em;
    color: #fff;
    background: var(--brand-gradient);
    background-size: 160% 160%;
    background-position: 0% 0%;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    transition: background-position .25s ease;
}

.btn-login:hover,
.btn-login:focus-visible {
    background-position: 100% 100%;
}

.btn-login:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 2px;
}

@media (max-width: 860px) {
    .auth-shell { flex-direction: column; }

    .brand-panel {
        flex: none;
        padding: 28px 24px 24px;
        gap: 18px;
    }
    .brand-logo { width: 152px; }
    .brand-copy h1 { font-size: 22px; margin-bottom: 8px; }
    .brand-copy p { font-size: 13.5px; line-height: 1.55; max-width: none; }
    .brand-partners { margin-top: 16px; }
    .partner-logo { height: 38px; }
    .brand-foot { margin-top: 4px; }

    .form-panel { padding: 32px 24px 48px; }
    .form-card { max-width: 400px; }
}

@media (max-width: 380px) {
    .brand-panel { padding: 24px 20px 20px; }
    .brand-logo { width: 136px; }
    .form-panel { padding: 28px 18px 40px; }
}

@media (max-height: 700px) and (max-width: 860px) {
    .brand-copy p { display: none; }
    .brand-partners { margin-top: 10px; }
}