:root {
    --auth-navy: #0b1f33;
    --auth-navy-deep: #071522;
    --auth-blue: #1256a3;
    --auth-orange: #ef7f1a;
    --auth-surface: #f5f7fa;
    --auth-muted: #66758a;
    --auth-border: #dce3eb;
    --auth-success: #17845b;
}

* {
    box-sizing: border-box;
}

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

body.erp-auth-body {
    margin: 0;
    min-height: 100vh;
    color: #172033;
    font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background:
        linear-gradient(rgba(71, 85, 105, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(71, 85, 105, .045) 1px, transparent 1px),
        var(--auth-surface);
    background-size: 32px 32px;
}

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

.erp-auth-header {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 13px clamp(20px, 4vw, 64px);
    background: rgba(255, 255, 255, .97);
    border-bottom: 1px solid var(--auth-border);
}

.erp-auth-brand {
    display: flex;
    align-items: center;
    gap: 13px;
}

.erp-auth-brand img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    padding: 4px;
    background: #fff;
    border: 1px solid var(--auth-border);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, .08);
}

.erp-auth-brand-name {
    color: var(--auth-navy);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: .02em;
}

.erp-auth-brand-subtitle {
    margin-top: 3px;
    color: var(--auth-muted);
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.erp-auth-security {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 13px;
    border: 1px solid #b7dccd;
    border-radius: 999px;
    color: var(--auth-success);
    background: #edf9f4;
    font-size: .78rem;
    font-weight: 700;
}

.erp-auth-main {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(360px, .9fr) minmax(440px, 1.1fr);
    align-items: stretch;
}

.erp-auth-visual {
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: clamp(36px, 5vw, 76px);
    color: #fff;
    background:
        radial-gradient(circle at 22% 18%, rgba(61, 131, 204, .32), transparent 28%),
        radial-gradient(circle at 84% 74%, rgba(239, 127, 26, .18), transparent 25%),
        linear-gradient(145deg, #0b1f33 0%, #0a2947 55%, #071522 100%);
}

.erp-auth-visual::before,
.erp-auth-visual::after {
    content: "";
    position: absolute;
    border: 1px solid rgba(143, 179, 214, .18);
    border-radius: 50%;
}

.erp-auth-visual::before {
    width: 390px;
    height: 390px;
    right: -140px;
    top: -120px;
}

.erp-auth-visual::after {
    width: 260px;
    height: 260px;
    left: -105px;
    bottom: -100px;
}

.erp-auth-visual-inner {
    position: relative;
    z-index: 1;
    width: min(100%, 560px);
    animation: authFadeUp .55s ease both;
}

.erp-auth-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 18px;
    color: #9fc4e8;
    font-size: .74rem;
    font-weight: 800;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.erp-auth-eyebrow::before {
    content: "";
    width: 25px;
    height: 2px;
    background: var(--auth-orange);
}

.erp-auth-visual h1 {
    max-width: 500px;
    margin: 0;
    font-size: clamp(2rem, 4vw, 3.8rem);
    line-height: 1.06;
    letter-spacing: -.035em;
    font-weight: 800;
}

.erp-auth-visual p {
    max-width: 520px;
    margin: 22px 0 0;
    color: #cbd9e7;
    font-size: 1rem;
    line-height: 1.7;
}

.erp-auth-feature-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 30px;
}

.erp-auth-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 10px 13px;
    border: 1px solid rgba(159, 196, 232, .18);
    border-radius: 10px;
    background: rgba(255, 255, 255, .055);
    color: #edf5fc;
    font-size: .84rem;
}

.erp-auth-feature i {
    color: #f4a155;
}

.erp-auth-form-side {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(34px, 6vw, 86px);
    background: rgba(255, 255, 255, .9);
}

.erp-auth-card {
    width: min(100%, 470px);
    border: 1px solid rgba(220, 227, 235, .95);
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 24px 70px rgba(7, 21, 34, .14);
    overflow: hidden;
    animation: authFadeUp .6s .08s ease both;
}

.erp-auth-card-accent {
    height: 5px;
    background: linear-gradient(90deg, var(--auth-blue), var(--auth-orange));
}

.erp-auth-card-body {
    padding: clamp(26px, 4vw, 42px);
}

.erp-auth-card h2 {
    margin: 0;
    color: var(--auth-navy);
    font-size: 1.65rem;
    font-weight: 800;
}

.erp-auth-card-intro {
    margin: 9px 0 26px;
    color: var(--auth-muted);
    line-height: 1.6;
}

.erp-auth-card .form-label {
    color: #334155;
    font-size: .8rem;
    font-weight: 750;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.erp-auth-card .form-control {
    min-height: 50px;
    border: 1px solid #ccd6e1;
    border-radius: 9px;
    padding: 11px 13px;
}

.erp-auth-card .form-control:focus {
    border-color: var(--auth-blue);
    box-shadow: 0 0 0 4px rgba(18, 86, 163, .11);
}

.erp-auth-submit {
    min-height: 52px;
    border-radius: 9px;
    border: 1px solid var(--auth-blue);
    background: var(--auth-blue);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 13px 28px rgba(18, 86, 163, .2);
}

.erp-auth-submit:hover,
.erp-auth-submit:focus {
    color: #fff;
    background: #0d488b;
    border-color: #0d488b;
}

.erp-auth-secondary-link {
    color: var(--auth-blue);
    font-size: .86rem;
    font-weight: 700;
    text-decoration: none;
}

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

.erp-auth-divider {
    height: 1px;
    margin: 24px 0 17px;
    background: var(--auth-border);
}

.erp-auth-note {
    color: var(--auth-muted);
    font-size: .78rem;
    line-height: 1.55;
}

.erp-auth-footer {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 13px clamp(20px, 4vw, 64px);
    border-top: 1px solid var(--auth-border);
    background: #fff;
    color: var(--auth-muted);
    font-size: .76rem;
}

@keyframes authFadeUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 991.98px) {
    .erp-auth-main {
        grid-template-columns: 1fr;
    }

    .erp-auth-visual {
        min-height: 360px;
    }
}

@media (max-width: 575.98px) {
    .erp-auth-header,
    .erp-auth-footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .erp-auth-security {
        display: none;
    }

    .erp-auth-visual {
        min-height: 315px;
        padding: 34px 22px;
    }

    .erp-auth-feature-list {
        grid-template-columns: 1fr;
    }

    .erp-auth-form-side {
        padding: 26px 16px 38px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .erp-auth-card,
    .erp-auth-visual-inner {
        animation: none;
    }
}