:root {
    --auth-accent: #2563eb;
    --auth-accent-dark: #1d4ed8;
    --auth-secondary: #059669;
    --auth-ink: #0f172a;
    --auth-muted: #64748b;
    --auth-line: #cbd5e1;
    --auth-panel: #f3f6fb;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body.auth-page {
    margin: 0;
    min-height: 100vh;
    background: var(--auth-panel);
    color: var(--auth-ink);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0;
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(360px, 42%) minmax(520px, 1fr);
    overflow: hidden;
}

.auth-showcase {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow: hidden;
    padding: clamp(28px, 4vw, 64px) clamp(32px, 5.5vw, 88px) 24px;
    background: #fff;
    border-right: 1px solid #e2e8f0;
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 13px;
    color: var(--auth-ink);
    font-size: 16px;
    font-weight: 700;
}

.auth-brand img {
    width: 58px;
    height: 58px;
    object-fit: contain;
}

.auth-brand small {
    display: block;
    margin-top: 2px;
    color: var(--auth-muted);
    font-size: 11px;
    font-weight: 600;
}

.auth-showcase-copy {
    width: min(100%, 480px);
    margin: clamp(30px, 6vh, 70px) auto 0;
    text-align: center;
}

.auth-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 14px;
    color: var(--auth-accent-dark);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.auth-eyebrow::before {
    width: 22px;
    height: 2px;
    background: var(--auth-secondary);
    content: '';
}

.auth-showcase h1 {
    margin: 0 0 12px;
    font-size: clamp(30px, 3vw, 44px);
    line-height: 1.12;
    font-weight: 750;
}

.auth-showcase-copy p {
    max-width: 420px;
    margin: 0 auto;
    color: var(--auth-muted);
    font-size: 15px;
    line-height: 1.7;
}

.auth-art {
    display: block;
    width: min(100%, 520px);
    max-height: 44vh;
    margin: auto auto 10px;
    object-fit: contain;
}

.auth-showcase-footer {
    margin: 0;
    color: #94a3b8;
    font-size: 11px;
    text-align: center;
}

.auth-form-panel {
    position: relative;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 56px clamp(34px, 8vw, 132px);
    background: var(--auth-panel);
}

.auth-form-panel::before {
    position: absolute;
    top: -3%;
    bottom: -3%;
    left: -68px;
    width: 136px;
    background: var(--auth-panel);
    content: '';
    transform: skewX(-8deg);
}

.auth-form-wrap {
    position: relative;
    z-index: 1;
    width: min(100%, 480px);
}

.auth-portal-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
    color: var(--auth-accent-dark);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.auth-portal-label i { font-size: 16px; }

.auth-form-wrap h2 {
    margin: 0 0 8px;
    font-size: clamp(25px, 2.2vw, 34px);
    line-height: 1.2;
    font-weight: 750;
}

.auth-form-intro {
    margin: 0 0 30px;
    color: var(--auth-muted);
    font-size: 14px;
    line-height: 1.6;
}

.auth-field { margin-bottom: 19px; }

.auth-label {
    display: block;
    margin-bottom: 7px;
    color: #334155;
    font-size: 13px;
    font-weight: 700;
}

.auth-control,
.auth-password .auth-control {
    width: 100%;
    height: 54px;
    margin: 0;
    border: 1px solid var(--auth-line);
    border-radius: 8px;
    outline: none;
    background: #fff;
    color: var(--auth-ink);
    font-size: 15px;
    transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

.auth-control { padding: 0 16px; }
.auth-password .auth-control { padding: 0 50px 0 16px; }

.auth-control:focus {
    border-color: var(--auth-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--auth-accent) 14%, transparent);
    background: #fff;
}

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

.auth-password { position: relative; }

.auth-password-toggle {
    position: absolute;
    top: 50%;
    right: 7px;
    display: grid;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: #64748b;
    cursor: pointer;
    place-items: center;
}

.auth-password-toggle:hover,
.auth-password-toggle:focus-visible {
    background: #e8eef7;
    color: var(--auth-accent-dark);
    outline: none;
}

.auth-form-meta {
    display: flex;
    justify-content: flex-end;
    min-height: 22px;
    margin: -4px 0 19px;
}

.auth-link {
    color: var(--auth-accent-dark);
    font-size: 13px;
    font-weight: 650;
    text-decoration: none;
}

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

.auth-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: 100%;
    min-height: 52px;
    padding: 0 18px;
    border: 1px solid var(--auth-accent);
    border-radius: 8px;
    background: var(--auth-accent);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: background .18s ease, border-color .18s ease, transform .18s ease;
}

.auth-submit:hover {
    border-color: var(--auth-accent-dark);
    background: var(--auth-accent-dark);
    transform: translateY(-1px);
}

.auth-submit:disabled { cursor: wait; opacity: .72; transform: none; }

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 27px 0 18px;
    color: #94a3b8;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
    height: 1px;
    background: #dbe3ee;
    content: '';
    flex: 1;
}

.auth-other-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #fff;
    color: #334155;
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
}

.auth-other-link:hover {
    border-color: var(--auth-accent);
    color: var(--auth-accent-dark);
}

.auth-alert {
    margin-bottom: 20px;
    padding: 12px 14px;
    border: 1px solid;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
}

.auth-alert-success { border-color: #86efac; background: #f0fdf4; color: #166534; }
.auth-alert-danger { border-color: #fca5a5; background: #fef2f2; color: #991b1b; }

.auth-security-note {
    margin: 18px 0 0;
    color: #94a3b8;
    font-size: 11px;
    line-height: 1.5;
    text-align: center;
}

@media (max-width: 980px) {
    .auth-shell { grid-template-columns: 36% 64%; }
    .auth-showcase { padding: 34px 28px 24px; }
    .auth-form-panel { padding: 48px 52px; }
    .auth-showcase-copy { margin-top: 54px; }
    .auth-art { width: min(100%, 390px); }
}

@media (max-width: 760px) {
    body.auth-page { padding: 12px; }
    .auth-shell {
        display: block;
        min-height: calc(100vh - 24px);
        overflow: hidden;
        border: 1px solid #e2e8f0;
        border-radius: 8px;
        background: var(--auth-panel);
        box-shadow: 0 10px 32px rgba(15, 23, 42, .06);
    }
    .auth-showcase {
        min-height: auto;
        padding: 34px 24px 4px;
        border-right: 0;
        border-bottom: 0;
        background: var(--auth-panel);
    }
    .auth-brand { justify-content: center; }
    .auth-brand img { width: 74px; height: 74px; }
    .auth-brand span,
    .auth-showcase-copy,
    .auth-art,
    .auth-showcase-footer,
    .auth-portal-label,
    .auth-form-intro,
    .auth-security-note { display: none; }
    .auth-form-panel {
        min-height: auto;
        padding: 18px 24px 34px;
    }
    .auth-form-panel::before { display: none; }
    .auth-form-wrap h2 {
        margin-bottom: 28px;
        font-size: 25px;
        text-align: center;
    }
}

@media (max-width: 420px) {
    body.auth-page { padding: 8px; }
    .auth-shell { min-height: calc(100vh - 16px); }
    .auth-showcase { padding: 28px 20px 2px; }
    .auth-brand img { width: 68px; height: 68px; }
    .auth-form-panel { padding: 16px 16px 30px; }
    .auth-form-wrap h2 { font-size: 25px; }
    .auth-control,
    .auth-password .auth-control { height: 56px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}