@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

:root {
    --kb-surface: #f9f9fa;
    --kb-surface-lowest: #ffffff;
    --kb-surface-low: #f3f3f4;
    --kb-surface-container: #eeeeef;
    --kb-surface-container-high: #e8e8e9;
    --kb-surface-container-highest: #e2e2e3;
    --kb-outline: #e4e4e7;
    --kb-outline-strong: #d1d5db;
    --kb-primary: #d65a20;
    --kb-primary-strong: #a23900;
    --kb-primary-soft: #ffdbce;
    --kb-secondary: #5f5e5f;
    --kb-on-surface: #1a1c1d;
    --kb-muted: #6b7280;
    --kb-danger: #ba1a1a;
    --kb-success: #10b981;
    --kb-warning: #f59e0b;
    --kb-radius-sm: 4px;
    --kb-radius-md: 6px;
    --kb-radius-lg: 8px;
    --kb-radius-xl: 12px;
    --kb-shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
    --kb-shadow-medium: 0 12px 24px rgba(0, 0, 0, 0.1);
    --kb-container-max: 1280px;
    --kb-content-max: 1120px;
    --kb-article-max: 720px;
}

* {
    box-sizing: border-box;
}

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

body.kb-public-body {
    background: var(--kb-surface);
    color: var(--kb-on-surface);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: var(--kb-primary-strong);
}

button,
input,
select,
textarea {
    font: inherit;
}

.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    font-size: 20px;
    line-height: 1;
    vertical-align: middle;
}

.kb-public-shell {
    min-height: 100vh;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
}

.kb-public-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(249, 249, 250, 0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--kb-outline);
}

.kb-public-header-inner {
    max-width: var(--kb-container-max);
    margin: 0 auto;
    padding: 14px 24px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 20px;
}

.kb-public-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.kb-public-brand-mark {
    width: 34px;
    height: 34px;
    border-radius: var(--kb-radius-lg);
    background: var(--kb-primary-strong);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    letter-spacing: 0.02em;
    box-shadow: var(--kb-shadow-soft);
    flex: 0 0 auto;
}

.kb-public-brand-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.kb-public-brand-title {
    margin: 0;
    color: var(--kb-primary-strong);
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.1;
}

.kb-public-brand-subtitle {
    color: var(--kb-on-surface);
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.15;
}

.kb-public-search {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 8px;
    max-width: 560px;
    width: 100%;
    justify-self: center;
    padding: 6px;
    border: 1px solid var(--kb-outline-strong);
    border-radius: 9999px;
    background: var(--kb-surface-lowest);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
}

.kb-public-search:focus-within {
    border-color: var(--kb-primary);
    box-shadow: 0 0 0 3px rgba(214, 90, 32, 0.12);
}

.kb-public-search input {
    min-width: 0;
    width: 100%;
    min-height: 38px;
    padding: 0 14px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--kb-on-surface);
}

.kb-public-search input::placeholder {
    color: #9ca3af;
}

.kb-public-search button {
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 9999px;
    background: var(--kb-primary-strong);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.kb-public-search button:hover {
    background: #8f3100;
}

.kb-public-nav {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.kb-public-nav-link {
    color: var(--kb-secondary);
    font-weight: 700;
    line-height: 1.2;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}

.kb-public-nav-link:hover,
.kb-public-nav-link:focus-visible,
.kb-public-nav-link.is-active {
    color: var(--kb-primary-strong);
    border-bottom-color: var(--kb-primary-strong);
}

.kb-public-main {
    padding: 32px 24px 56px;
}

.kb-public-content {
    max-width: var(--kb-container-max);
    margin: 0 auto;
    width: 100%;
    display: grid;
    gap: 24px;
}

.kb-page-hero,
.kb-page-panel,
.kb-page-card,
.kb-page-form,
.kb-page-breadcrumbs,
.kb-page-article {
    background: var(--kb-surface-lowest);
    border: 1px solid var(--kb-outline);
    border-radius: var(--kb-radius-xl);
    box-shadow: var(--kb-shadow-soft);
}

.kb-page-hero,
.kb-page-panel,
.kb-page-card,
.kb-page-form,
.kb-page-breadcrumbs,
.kb-page-article {
    padding: 24px;
}

.kb-page-hero {
    display: grid;
    gap: 24px;
}

.kb-page-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.95fr);
    gap: 24px;
    align-items: start;
}

.kb-page-hero-copy {
    display: grid;
    gap: 16px;
}

.kb-page-kicker {
    margin: 0;
    color: var(--kb-primary-strong);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.kb-page-title {
    margin: 0;
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.kb-page-subtitle {
    margin: 0;
    color: var(--kb-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    max-width: 60ch;
}

.kb-page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.kb-button,
.kb-button-secondary,
.kb-button-ghost {
    min-height: 44px;
    padding: 0 18px;
    border-radius: var(--kb-radius-lg);
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 700;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.kb-button:hover,
.kb-button-secondary:hover,
.kb-button-ghost:hover {
    transform: translateY(-1px);
}

.kb-button {
    background: var(--kb-primary-strong);
    color: #fff;
}

.kb-button:hover {
    color: #fff;
    background: #8f3100;
    box-shadow: var(--kb-shadow-soft);
}

.kb-button-secondary {
    background: var(--kb-surface-lowest);
    border-color: var(--kb-outline-strong);
    color: var(--kb-on-surface);
}

.kb-button-secondary:hover {
    color: var(--kb-primary-strong);
    border-color: var(--kb-primary-strong);
}

.kb-button-ghost {
    background: transparent;
    color: var(--kb-secondary);
    border-color: transparent;
}

.kb-button-ghost:hover {
    color: var(--kb-primary-strong);
    background: rgba(214, 90, 32, 0.06);
}

.kb-page-aside {
    display: grid;
    gap: 16px;
}

.kb-page-summary {
    display: grid;
    gap: 12px;
    padding: 20px;
    border-radius: var(--kb-radius-xl);
    border: 1px solid var(--kb-outline);
    background: linear-gradient(180deg, #fff, #fbfbfc);
}

.kb-page-summary h2,
.kb-page-summary h3,
.kb-page-panel h2,
.kb-page-card h2,
.kb-page-card h3,
.kb-page-article h1,
.kb-page-article h2 {
    margin: 0;
    letter-spacing: -0.02em;
}

.kb-page-summary p,
.kb-page-panel p,
.kb-page-card p,
.kb-page-article p {
    margin: 0;
    color: var(--kb-muted);
    line-height: 1.65;
}

.kb-section-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 16px;
    margin-bottom: 16px;
}

.kb-section-heading h2,
.kb-section-heading h3 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.kb-section-eyebrow {
    margin: 0 0 6px;
    color: var(--kb-primary-strong);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.kb-card-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px;
}

.kb-card-grid.kb-card-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.kb-card-grid.kb-card-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.kb-card-grid.kb-card-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.kb-card-grid.kb-card-grid-12 > * {
    grid-column: span 3;
}

.kb-bento-card,
.kb-category-card,
.kb-article-card,
.kb-search-result,
.kb-panel-card {
    display: grid;
    gap: 12px;
    padding: 20px;
    border: 1px solid var(--kb-outline);
    border-radius: var(--kb-radius-xl);
    background: var(--kb-surface-lowest);
    box-shadow: var(--kb-shadow-soft);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.kb-bento-card:hover,
.kb-category-card:hover,
.kb-article-card:hover,
.kb-search-result:hover,
.kb-panel-card:hover {
    border-color: var(--kb-primary);
    box-shadow: var(--kb-shadow-soft);
    transform: translateY(-1px);
}

.kb-bento-card h3,
.kb-category-card h3,
.kb-article-card h3,
.kb-search-result h3,
.kb-panel-card h3 {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.25;
}

.kb-bento-card p,
.kb-category-card p,
.kb-article-card p,
.kb-search-result p,
.kb-panel-card p {
    color: var(--kb-muted);
}

.kb-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--kb-radius-lg);
    background: rgba(214, 90, 32, 0.1);
    color: var(--kb-primary-strong);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex: 0 0 auto;
}

.kb-chip,
.kb-chip-neutral,
.kb-chip-featured,
.kb-chip-success,
.kb-chip-warning {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: fit-content;
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
}

.kb-chip,
.kb-chip-neutral {
    background: var(--kb-surface-low);
    color: var(--kb-secondary);
}

.kb-chip-featured {
    background: var(--kb-primary-soft);
    color: var(--kb-primary-strong);
}

.kb-chip-success {
    background: rgba(16, 185, 129, 0.12);
    color: #047857;
}

.kb-chip-warning {
    background: rgba(245, 158, 11, 0.12);
    color: #b45309;
}

.kb-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    color: var(--kb-muted);
    font-size: 0.875rem;
}

.kb-link-arrow,
.kb-inline-link {
    color: var(--kb-primary-strong);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.kb-link-arrow:hover,
.kb-inline-link:hover {
    color: #8f3100;
}

.kb-list-reset {
    list-style: none;
    margin: 0;
    padding: 0;
}

.kb-stack {
    display: grid;
    gap: 16px;
}

.kb-stack-lg {
    gap: 24px;
}

.kb-categories,
.kb-topics,
.kb-related-list,
.kb-results-list {
    display: grid;
    gap: 14px;
}

.kb-categories ul,
.kb-topics ul,
.kb-related-list ul,
.kb-results-list ul,
.kb-page-breadcrumbs ol {
    list-style: none;
    margin: 0;
    padding: 0;
}

.kb-categories > ul,
.kb-topics > ul,
.kb-related-list > ul,
.kb-results-list > ul {
    display: grid;
    gap: 12px;
}

.kb-category-tree > ul,
.kb-category-tree ul {
    display: grid;
    gap: 10px;
    padding-left: 18px;
    border-left: 1px solid var(--kb-outline);
    margin: 8px 0 0;
}

.kb-category-tree > ul {
    padding-left: 0;
    border-left: 0;
}

.kb-category-tree li {
    display: grid;
    gap: 8px;
}

.kb-breadcrumbs ol,
.kb-page-breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    color: var(--kb-muted);
    font-size: 0.9rem;
}

.kb-breadcrumbs li + li::before,
.kb-page-breadcrumbs li + li::before {
    content: "/";
    margin-right: 10px;
    color: var(--kb-muted);
}

.kb-breadcrumbs a,
.kb-page-breadcrumbs a {
    color: var(--kb-secondary);
    font-weight: 700;
}

.kb-breadcrumbs a:hover,
.kb-page-breadcrumbs a:hover {
    color: var(--kb-primary-strong);
}

.kb-search-form {
    display: grid;
    gap: 14px;
}

.kb-search-form .kb-search-row {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(160px, 0.5fr)) auto;
    gap: 12px;
}

.kb-search-form input,
.kb-search-form select,
.kb-search-form textarea,
.kb-page-form input,
.kb-page-form select,
.kb-page-form textarea {
    width: 100%;
    min-height: 44px;
    padding: 11px 14px;
    border: 1px solid var(--kb-outline-strong);
    border-radius: var(--kb-radius-lg);
    background: var(--kb-surface-lowest);
    color: var(--kb-on-surface);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.kb-search-form input::placeholder,
.kb-page-form input::placeholder,
.kb-page-form textarea::placeholder {
    color: #9ca3af;
}

.kb-search-form input:focus,
.kb-search-form select:focus,
.kb-search-form textarea:focus,
.kb-page-form input:focus,
.kb-page-form select:focus,
.kb-page-form textarea:focus {
    outline: 0;
    border-color: var(--kb-primary);
    box-shadow: 0 0 0 3px rgba(214, 90, 32, 0.12);
}

.kb-search-form .kb-search-row button,
.kb-page-form button {
    min-height: 44px;
    padding: 0 18px;
    border-radius: var(--kb-radius-lg);
    border: 1px solid transparent;
    background: var(--kb-primary-strong);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
}

.kb-search-form .kb-search-row button:hover,
.kb-page-form button:hover {
    background: #8f3100;
}

.kb-login-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--kb-outline);
}

.kb-login-form {
    display: grid;
    gap: 16px;
}

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

.kb-login-field label {
    color: var(--kb-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.kb-login-alert {
    padding: 14px 16px;
    border: 1px solid #f4c7c7;
    border-radius: var(--kb-radius-lg);
    background: #fff4f4;
    color: var(--kb-danger);
    line-height: 1.5;
}

.kb-login-submit {
    width: 100%;
}

.kb-search-hint {
    color: var(--kb-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

.kb-page-article {
    max-width: var(--kb-article-max);
}

.kb-page-article h1 {
    font-size: clamp(2rem, 2.6vw, 2.75rem);
    line-height: 1.1;
}

.kb-page-article h2 {
    font-size: 1.35rem;
    margin-top: 1.5rem;
}

.kb-page-article h3 {
    margin: 1.35rem 0 0.65rem;
    font-size: 1.1rem;
}

.kb-page-article article {
    display: grid;
    gap: 16px;
    line-height: 1.75;
}

.kb-page-article article p,
.kb-page-article article li {
    color: var(--kb-on-surface);
}

.kb-page-article article img {
    max-width: 100%;
    height: auto;
    border-radius: var(--kb-radius-lg);
}

.kb-page-article article code,
.kb-page-article article pre {
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    background: #1a1a1b;
    color: #f5f5f5;
    border-radius: var(--kb-radius-md);
}

.kb-page-article article code {
    padding: 0.15rem 0.4rem;
}

.kb-page-article article pre {
    padding: 12px;
    overflow: auto;
}

.kb-page-article article blockquote {
    margin: 0;
    padding: 12px 16px;
    border-left: 4px solid var(--kb-primary);
    color: var(--kb-secondary);
    font-style: italic;
    background: var(--kb-surface-low);
    border-radius: 0 var(--kb-radius-lg) var(--kb-radius-lg) 0;
}

.kb-page-article article table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.kb-page-article article th,
.kb-page-article article td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--kb-outline);
    text-align: left;
    vertical-align: top;
}

.kb-page-article article thead th {
    background: var(--kb-surface-low);
    color: var(--kb-secondary);
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.kb-public-footer {
    border-top: 1px solid var(--kb-outline);
    background: var(--kb-surface-lowest);
}

.kb-public-footer-inner {
    max-width: var(--kb-container-max);
    margin: 0 auto;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.kb-public-footer-brand {
    margin: 0;
    color: var(--kb-on-surface);
    font-size: 1rem;
    font-weight: 800;
}

.kb-public-footer-copy {
    margin: 6px 0 0;
    color: var(--kb-muted);
}

.kb-public-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--kb-secondary);
    font-weight: 700;
}

.kb-public-footer-links a:hover {
    color: var(--kb-primary-strong);
}

.kb-support-panel {
    display: grid;
    gap: 16px;
    padding: 20px;
    border-radius: var(--kb-radius-xl);
    border: 1px solid var(--kb-outline);
    background: linear-gradient(180deg, #fff, #fcfcfd);
}

.kb-support-panel .kb-support-actions {
    display: grid;
    gap: 10px;
}

.kb-support-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--kb-outline);
    color: var(--kb-on-surface);
}

.kb-support-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 9999px;
    background: var(--kb-success);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
}

.kb-empty-state {
    padding: 20px;
    border: 1px dashed var(--kb-outline-strong);
    border-radius: var(--kb-radius-xl);
    background: rgba(255, 255, 255, 0.7);
    color: var(--kb-muted);
}

.kb-muted {
    color: var(--kb-muted);
}

@media (max-width: 1100px) {
    .kb-public-header-inner {
        grid-template-columns: auto minmax(0, 1fr);
        grid-template-areas:
            "brand nav"
            "search search";
    }

    .kb-public-brand {
        grid-area: brand;
    }

    .kb-public-search {
        grid-area: search;
        max-width: none;
        justify-self: stretch;
    }

    .kb-public-nav {
        grid-area: nav;
    }

    .kb-page-hero-grid {
        grid-template-columns: 1fr;
    }

    .kb-card-grid,
    .kb-card-grid.kb-card-grid-4,
    .kb-card-grid.kb-card-grid-3,
    .kb-card-grid.kb-card-grid-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .kb-search-form .kb-search-row {
        grid-template-columns: 1fr 1fr;
    }

    .kb-search-form .kb-search-row button {
        grid-column: 1 / -1;
    }
}

@media (max-width: 760px) {
    .kb-public-header-inner,
    .kb-public-main,
    .kb-public-footer-inner {
        padding-left: 16px;
        padding-right: 16px;
    }

    .kb-public-header-inner {
        grid-template-columns: 1fr;
        grid-template-areas:
            "brand"
            "search"
            "nav";
        justify-items: stretch;
    }

    .kb-public-nav {
        justify-content: flex-start;
    }

    .kb-page-hero,
    .kb-page-panel,
    .kb-page-card,
    .kb-page-form,
    .kb-page-breadcrumbs,
    .kb-page-article,
    .kb-support-panel {
        padding: 18px;
    }

    .kb-card-grid,
    .kb-card-grid.kb-card-grid-4,
    .kb-card-grid.kb-card-grid-3,
    .kb-card-grid.kb-card-grid-2 {
        grid-template-columns: 1fr;
    }

    .kb-search-form .kb-search-row {
        grid-template-columns: 1fr;
    }
}