:root {
    --color-bg: #F5F7FA;
    --color-gradient: #F5F7FA;
    --color-surface: rgba(255, 255, 255, 0.95);
    --color-primary: #1A73E8;
    --color-primary-hover: #1559C0;
    --color-primary-rgb: 26, 115, 232;
    --color-text: #0F172A;
    --color-text-muted: #475569;
    --color-input-bg: #ffffff;
    --color-input-border: #d1d5db;
    --color-success: #14B866;
    --color-danger: #EF4444;
    --shadow-card: 0 14px 40px rgba(15, 23, 42, 0.12);
    --radius-card: 16px;
    --focus-ring: 0 0 0 3px rgba(var(--color-primary-rgb), 0.25);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
}

.portal-bg {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 0;
}

.portal-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(2.8rem, 4vw, 4.5rem) clamp(1.5rem, 5vw, 3.5rem);
}

.portal-card {
    width: min(1100px, 100%);
    display: grid;
    grid-template-columns: 45% 55%;
    border-radius: var(--radius-card);
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(12px);
    overflow: hidden;
}

.portal-pane {
    padding: clamp(2.6rem, 5vw, 4rem);
}

.portal-pane--branding {
    background: linear-gradient(180deg, rgba(var(--color-primary-rgb), 0.08) 0%, rgba(203, 213, 225, 0.12) 42%, rgba(255, 255, 255, 0.7) 100%);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 2.2rem;
}

.branding-header {
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
}

.branding-logo {
    display: inline-flex;
    align-items: center;
}

.branding-logo img {
    width: clamp(150px, 18vw, 210px);
    height: auto;
}

.branding-title {
    margin: 0;
    font-size: clamp(1.9rem, 2.7vw, 2.5rem);
    font-weight: 600;
    color: var(--color-text);
}

.branding-subtitle {
    margin: 0;
    font-size: 1.05rem;
    color: var(--color-text-muted);
    max-width: 22rem;
    line-height: 1.6;
}

.branding-meta {
    display: grid;
    gap: 0.8rem;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.branding-meta strong {
    display: block;
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.brand-duo {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    flex-wrap: wrap;
}

.brand-card {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.9rem;
    border-radius: 12px;
    background: rgba(var(--brand-card-rgb, var(--color-primary-rgb)), 0.1);
    color: var(--color-text);
    border: 1px solid rgba(var(--brand-card-rgb, var(--color-primary-rgb)), 0.18);
}

.brand-avatar {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--brand-card-rgb, var(--color-primary-rgb)), 0.18);
    color: var(--color-text);
    font-weight: 600;
    font-size: 1rem;
}

.brand-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.brand-detail {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-detail span:first-child {
    font-weight: 600;
}

.portal-pane--form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    background: rgba(255, 255, 255, 0.9);
}

.portal-lang-switch {
    display: flex;
    gap: 0.35rem;
}

.lang-pill {
    padding: 0.4rem 0.85rem;
    border-radius: 999px;
    border: 1px solid rgba(var(--color-primary-rgb), 0.25);
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.lang-pill.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.lang-pill:hover,
.lang-pill:focus-visible {
    color: var(--color-primary);
    border-color: var(--color-primary);
    outline: none;
}

.portal-tenant-switch {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.portal-tenant-switch label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

.portal-tenant-switch .form-select {
    border-radius: 999px;
    padding: 0.5rem 0.9rem;
}

.portal-link-back {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.portal-link-back:hover,
.portal-link-back:focus-visible {
    color: var(--color-primary);
    outline: none;
    box-shadow: var(--focus-ring);
}

.portal-tabs-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.tabs {
    display: flex;
    gap: 0.75rem;
    flex: 1 1 320px;
}

.tabs a {
    flex: 1 1 0;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    background: rgba(16, 42, 67, 0.08);
    color: var(--color-text-muted);
    text-decoration: none;
    text-align: center;
    font-weight: 600;
    transition: background 0.2s ease, color 0.2s ease;
}

.tabs a:hover {
    background: rgba(var(--color-primary-rgb), 0.18);
    color: var(--color-primary);
}

.tabs a.active {
    background: var(--color-primary);
    color: #ffffff;
}

.tabs a:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.portal-messages {
    min-height: 1rem;
}

.alert {
    margin: 0 0 1.1rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    font-size: 0.95rem;
}

.alert ul {
    margin: 0;
    padding-left: 1.1rem;
}

.alert-danger {
    background: rgba(var(--color-primary-rgb), 0.08);
    border: 1px solid rgba(var(--color-primary-rgb), 0.2);
    color: var(--color-danger);
}

.alert-success {
    background: rgba(20, 184, 102, 0.16);
    border: 1px solid rgba(20, 184, 102, 0.35);
    color: var(--color-success);
}

.portal-form {
    display: grid;
    gap: 1.2rem;
}

.form-field label {
    display: block;
    margin-bottom: 0.45rem;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

.form-control,
.form-select,
textarea.form-control {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--color-input-border);
    background: var(--color-input-bg);
    color: var(--color-text);
    padding: 0.8rem 1rem;
    font-size: 1rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control::placeholder,
textarea.form-control::placeholder {
    color: rgba(99, 102, 106, 0.55);
}

.form-control:focus,
.form-select:focus,
textarea.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

.form-control:disabled,
.form-select:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.form-helper {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: none;
    padding: 0.75rem 1.6rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(148, 163, 184, 0.7);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.portal-footer {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.portal-footer a {
    color: inherit;
    text-decoration: none;
}

.portal-footer a:hover,
.portal-footer a:focus-visible {
    color: var(--color-primary);
}

@media (max-width: 900px) {
    .portal-card {
        grid-template-columns: 1fr;
    }

    .portal-pane--branding {
        text-align: center;
        align-items: center;
    }

    .branding-subtitle,
    .branding-meta {
        max-width: 100%;
    }

    .portal-footer {
        text-align: center;
    }
}

@media (max-width: 600px) {
    .portal-shell {
        padding: 2rem 1.25rem;
    }

    .portal-pane {
        padding: 2rem 1.6rem;
    }

    .tabs {
        flex-direction: column;
    }

    .tabs a {
        width: 100%;
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .form-helper {
        text-align: center;
    }
}