:root {
    --mkb-blue-soft: #eff6ff;
    --mkb-green-soft: #ecfdf5;
    --mkb-ink: #111827;
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

button,
input {
    font: inherit;
}

.nav-links a[aria-current="page"] {
    color: var(--brand);
}

.mkb-hero {
    padding: 4.25rem 0 2.5rem;
    background:
        radial-gradient(circle at 16% 0%, rgba(10, 132, 255, 0.09), transparent 36%),
        linear-gradient(180deg, #fff 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--line);
    text-align: center;
}

.mkb-hero-inner {
    max-width: 960px;
}

.mkb-kicker,
.mkb-eyebrow {
    color: var(--brand);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
}

.mkb-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 1rem;
    padding: 0.4rem 0.8rem;
    background: var(--mkb-blue-soft);
    border: 1px solid rgba(10, 132, 255, 0.16);
    border-radius: 999px;
}

.mkb-hero h1 {
    max-width: 900px;
    margin: 0 auto 1rem;
    font-size: clamp(2.15rem, 4vw, 3.65rem);
    line-height: 1.08;
    letter-spacing: 0;
}

.mkb-lead {
    max-width: 760px;
    margin: 0 auto 1.5rem;
    color: var(--text-muted);
    font-size: 1.08rem;
}

.mkb-search-shell {
    max-width: 850px;
    margin: 0 auto;
    padding: 10px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 20px;
    box-shadow: 0 18px 40px -28px rgba(15, 23, 42, 0.45);
}

.mkb-search-box {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 66px;
    background: #fff;
    border: 2px solid var(--line);
    border-radius: 14px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.mkb-search-box:focus-within {
    border-color: var(--brand);
    box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.12);
}

.mkb-search-box > .bi-search {
    margin-left: 1.2rem;
    color: var(--brand);
    font-size: 1.25rem;
}

.mkb-input {
    width: 100%;
    min-width: 0;
    padding: 1rem 3rem 1rem 0.85rem;
    color: var(--text-main);
    background: transparent;
    border: 0;
    outline: 0;
    font-size: 1.05rem;
}

.mkb-clear {
    position: absolute;
    right: 0.75rem;
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    background: #f1f5f9;
    border: 0;
    border-radius: 8px;
    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    transition: opacity 0.2s ease, background 0.2s ease;
}

.mkb-clear.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.mkb-clear:hover {
    color: var(--brand);
    background: var(--mkb-blue-soft);
}

.mkb-search-meta {
    display: flex;
    justify-content: center;
    gap: 0.75rem 1.5rem;
    flex-wrap: wrap;
    padding: 0.8rem 0.5rem 0.1rem;
    color: var(--text-muted);
    font-size: 0.84rem;
    font-weight: 650;
}

.mkb-search-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.mkb-search-meta i {
    color: #059669;
}

.mkb-popular {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.mkb-popular button,
.mkb-intent-grid article button {
    color: var(--text-muted);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 999px;
    cursor: pointer;
}

.mkb-popular button {
    padding: 0.35rem 0.65rem;
    font-weight: 700;
}

.mkb-popular button:hover,
.mkb-intent-grid article button:hover {
    color: var(--brand);
    border-color: var(--brand);
}

.mkb-workspace {
    padding: 3.5rem 0 4.5rem;
}

.mkb-class-index {
    margin-bottom: 3rem;
}

.mkb-section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.mkb-section-head h2 {
    margin: 0.35rem 0 0;
    font-size: 1.75rem;
}

.mkb-section-head p {
    margin: 0.65rem auto 0;
    color: var(--text-muted);
}

.mkb-section-head-centered {
    justify-content: center;
    text-align: center;
}

.mkb-text-button {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 0.75rem;
    color: var(--brand);
    background: transparent;
    border: 0;
    font-weight: 700;
    cursor: pointer;
}

.mkb-class-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.mkb-class-grid button {
    min-height: 88px;
    padding: 0.8rem;
    text-align: left;
    background: #fff;
    border: 0;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.mkb-class-grid button:hover {
    background: var(--mkb-blue-soft);
}

.mkb-class-grid strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--brand);
    font-size: 1rem;
}

.mkb-class-grid span {
    display: block;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 650;
    line-height: 1.3;
}

.mkb-results-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2rem;
    align-items: start;
}

.mkb-results-panel {
    min-width: 0;
}

.mkb-results-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.mkb-results-header h2 {
    margin: 0.3rem 0 0;
    font-size: 1.6rem;
}

.mkb-result-count {
    flex-shrink: 0;
    padding: 0.35rem 0.65rem;
    color: #047857;
    background: var(--mkb-green-soft);
    border: 1px solid #a7f3d0;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 800;
}

.mkb-results {
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
}

.mkb-loading,
.mkb-empty {
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
}

.mkb-spinner {
    display: block;
    width: 34px;
    height: 34px;
    margin: 0 auto 1rem;
    border: 3px solid #dbeafe;
    border-top-color: var(--brand);
    border-radius: 50%;
    animation: mkb-spin 0.8s linear infinite;
}

@keyframes mkb-spin {
    to { transform: rotate(360deg); }
}

.mkb-empty i {
    color: #94a3b8;
    font-size: 2rem;
}

.mkb-empty h3 {
    margin: 0.75rem 0 0.35rem;
}

.mkb-class-row {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr) auto;
    gap: 1rem;
    width: 100%;
    align-items: center;
    padding: 1rem;
    text-align: left;
    background: #fff;
    border: 0;
    border-bottom: 1px solid var(--line);
    cursor: pointer;
}

.mkb-class-row:last-child {
    border-bottom: 0;
}

.mkb-class-row:hover {
    background: #f8fafc;
}

.mkb-code {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    justify-content: center;
    padding: 0.3rem 0.55rem;
    color: #075985;
    background: #e0f2fe;
    border: 1px solid #bae6fd;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-weight: 800;
    white-space: nowrap;
}

.mkb-class-row-copy strong {
    display: block;
    color: var(--text-main);
}

.mkb-class-row-copy small {
    display: block;
    margin-top: 0.2rem;
    color: var(--text-muted);
}

.mkb-class-row > i {
    color: var(--brand);
}

.mkb-result-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--line);
}

.mkb-result-card:last-child {
    border-bottom: 0;
}

.mkb-result-card:hover {
    background: #fbfdff;
}

.mkb-result-main {
    display: flex;
    min-width: 0;
    align-items: flex-start;
    gap: 0.8rem;
}

.mkb-result-copy {
    min-width: 0;
}

.mkb-result-copy h3 {
    margin: 0;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.98rem;
    font-weight: 750;
    line-height: 1.4;
}

.mkb-result-copy p {
    margin: 0.3rem 0 0;
    color: var(--text-muted);
    font-size: 0.78rem;
}

.mkb-result-actions {
    display: flex;
    flex-shrink: 0;
    gap: 0.4rem;
}

.mkb-action {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.45rem 0.65rem;
    border-radius: 7px;
    font-size: 0.78rem;
    font-weight: 750;
    cursor: pointer;
}

.mkb-action-secondary {
    color: var(--text-muted);
    background: #fff;
    border: 1px solid var(--line);
}

.mkb-action-secondary:hover {
    color: var(--brand);
    border-color: var(--brand);
}

.mkb-action-primary {
    color: #fff;
    background: var(--brand);
    border: 1px solid var(--brand);
}

.mkb-action-primary:hover {
    color: #fff;
    background: var(--brand-dark);
}

.mkb-load-more {
    margin-top: 1.25rem;
    text-align: center;
}

.mkb-sidebar {
    position: sticky;
    top: 1rem;
    display: grid;
    gap: 1rem;
}

.mkb-app-promo {
    padding: 1.4rem;
    color: #fff;
    background: #172033;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.mkb-promo-label {
    color: #7dd3fc;
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.mkb-app-promo h2 {
    margin: 0.6rem 0;
    color: #fff;
    font-size: 1.35rem;
}

.mkb-app-promo p {
    margin: 0 0 1rem;
    color: #cbd5e1;
    font-size: 0.9rem;
}

.mkb-app-promo .btn {
    width: 100%;
}

.mkb-app-promo small {
    display: block;
    margin-top: 0.75rem;
    color: #94a3b8;
    font-size: 0.72rem;
    line-height: 1.4;
}

.mkb-recent,
.mkb-related {
    padding: 1.2rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
}

.mkb-recent h3,
.mkb-related h3 {
    margin: 0 0 0.8rem;
    font-size: 1rem;
}

.mkb-recent ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.mkb-recent li + li {
    border-top: 1px solid var(--line);
}

.mkb-recent button {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.5rem;
    width: 100%;
    padding: 0.65rem 0;
    text-align: left;
    background: transparent;
    border: 0;
    cursor: pointer;
}

.mkb-recent span {
    color: var(--brand);
    font-weight: 800;
}

.mkb-recent strong {
    overflow: hidden;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mkb-related {
    display: grid;
    gap: 0.65rem;
}

.mkb-related a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 650;
}

.mkb-related a:hover {
    color: var(--brand);
}

.mkb-intents {
    padding: 4.5rem 0;
    background: #fff;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.mkb-intent-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: 12px;
}

.mkb-intent-grid article {
    padding: 1.4rem;
    background: #fff;
}

.mkb-intent-icon {
    display: flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--brand);
    background: var(--mkb-blue-soft);
    border-radius: 9px;
    font-size: 1.2rem;
}

.mkb-intent-grid h3 {
    margin-bottom: 0.45rem;
    font-size: 1.05rem;
}

.mkb-intent-grid p {
    margin: 0 0 1rem;
    color: var(--text-muted);
    font-size: 0.88rem;
}

.mkb-intent-grid article > div:last-child {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.mkb-intent-grid article button {
    padding: 0.35rem 0.55rem;
    font-size: 0.78rem;
    font-weight: 650;
}

.mkb-seo {
    padding: 5rem 0;
}

.mkb-seo-inner {
    max-width: 1000px;
}

.mkb-seo-copy {
    max-width: 850px;
}

.mkb-seo-copy h2 {
    margin-top: 0.5rem;
}

.mkb-seo-copy h3 {
    margin-top: 2rem;
}

.mkb-seo-copy p {
    color: var(--text-muted);
}

.mkb-faq {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 3rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--line);
}

.mkb-faq-heading h2 {
    margin-top: 0.45rem;
    font-size: 1.65rem;
}

.mkb-faq-list {
    border-top: 1px solid var(--line);
}

.mkb-faq details {
    border-bottom: 1px solid var(--line);
}

.mkb-faq summary {
    position: relative;
    padding: 1.1rem 2.2rem 1.1rem 0;
    color: var(--text-main);
    font-weight: 700;
    cursor: pointer;
    list-style: none;
}

.mkb-faq summary::-webkit-details-marker {
    display: none;
}

.mkb-faq summary::after {
    content: "+";
    position: absolute;
    top: 50%;
    right: 0.2rem;
    color: var(--brand);
    font-size: 1.35rem;
    transform: translateY(-50%);
}

.mkb-faq details[open] summary::after {
    content: "−";
}

.mkb-faq details p {
    margin: -0.2rem 2rem 1.1rem 0;
    color: var(--text-muted);
}

.mkb-toast {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 1500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: #fff;
    background: #059669;
    border-radius: 9px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.mkb-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.mkb-mobile-promo {
    display: none;
}

@media (max-width: 1050px) {
    .mkb-class-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

    .mkb-results-layout {
        grid-template-columns: minmax(0, 1fr) 260px;
    }
}

@media (max-width: 900px) {
    .mkb-hero {
        padding-top: 3.25rem;
    }

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

    .mkb-results-layout {
        grid-template-columns: 1fr;
    }

    .mkb-sidebar {
        position: static;
        grid-template-columns: 1fr 1fr;
    }

    .mkb-app-promo {
        grid-column: 1 / -1;
    }

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

@media (max-width: 768px) {
    .mkb-hero {
        padding: 2.5rem 0 1.75rem;
    }

    .mkb-hero h1 {
        font-size: 2.15rem;
    }

    .mkb-lead {
        font-size: 0.98rem;
    }

    .mkb-search-shell {
        width: calc(100% - 8px);
        padding: 0;
        background: transparent;
        border: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .mkb-search-box {
        min-height: 60px;
    }

    .mkb-search-meta {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
        padding-top: 0.75rem;
    }

    .mkb-search-meta span {
        justify-content: center;
        font-size: 0.7rem;
        line-height: 1.25;
    }

    .mkb-popular {
        justify-content: flex-start;
    }

    .mkb-popular > span {
        width: 100%;
        text-align: left;
    }

    .mkb-workspace {
        padding: 2.5rem 0 3.5rem;
    }

    .mkb-class-index {
        margin-bottom: 2.5rem;
    }

    .mkb-section-head {
        align-items: center;
    }

    .mkb-section-head h2 {
        font-size: 1.45rem;
    }

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

    .mkb-class-grid button {
        min-height: 76px;
    }

    .mkb-results-header {
        align-items: flex-start;
    }

    .mkb-results-header h2 {
        font-size: 1.35rem;
    }

    .mkb-result-card {
        display: block;
        padding: 0.9rem;
    }

    .mkb-result-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        margin-top: 0.85rem;
    }

    .mkb-action {
        min-height: 42px;
    }

    .mkb-result-actions .mkb-action:only-child {
        grid-column: 1 / -1;
    }

    .mkb-class-row {
        grid-template-columns: auto minmax(0, 1fr) auto;
        gap: 0.65rem;
    }

    .mkb-sidebar {
        grid-template-columns: 1fr;
    }

    .mkb-related {
        display: none;
    }

    .mkb-intents {
        padding: 3.5rem 0;
    }

    .mkb-intent-grid {
        grid-template-columns: 1fr;
    }

    .mkb-seo {
        padding: 3.5rem 0 5rem;
    }

    .mkb-faq {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-top: 3rem;
        padding-top: 2.5rem;
    }

    .mkb-mobile-promo {
        position: fixed;
        right: 0.75rem;
        bottom: 0.75rem;
        left: 0.75rem;
        z-index: 1400;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto auto;
        gap: 0.75rem;
        align-items: center;
        padding: 0.75rem;
        color: #fff;
        background: rgba(23, 32, 51, 0.96);
        border: 1px solid rgba(255,255,255,0.12);
        border-radius: 12px;
        box-shadow: 0 14px 40px rgba(15, 23, 42, 0.3);
        opacity: 0;
        transform: translateY(140%);
        pointer-events: none;
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .mkb-mobile-promo.is-visible {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .mkb-mobile-promo strong,
    .mkb-mobile-promo span {
        display: block;
    }

    .mkb-mobile-promo strong {
        font-size: 0.85rem;
    }

    .mkb-mobile-promo span {
        color: #cbd5e1;
        font-size: 0.72rem;
    }

    .mkb-mobile-promo a {
        padding: 0.55rem 0.75rem;
        color: #fff;
        background: var(--brand);
        border-radius: 7px;
        font-size: 0.78rem;
        font-weight: 750;
    }

    .mkb-mobile-promo button {
        display: inline-flex;
        width: 36px;
        height: 36px;
        align-items: center;
        justify-content: center;
        color: #cbd5e1;
        background: transparent;
        border: 0;
        cursor: pointer;
    }

    .mkb-toast {
        right: 0.75rem;
        bottom: 5.75rem;
        left: 0.75rem;
        justify-content: center;
    }
}

@media (max-width: 420px) {
    .mkb-hero h1 {
        font-size: 1.95rem;
    }

    .mkb-search-meta {
        grid-template-columns: 1fr 1fr;
    }

    .mkb-search-meta span:last-child {
        grid-column: 1 / -1;
    }

    .mkb-class-grid {
        grid-template-columns: 1fr 1fr;
    }

    .mkb-class-grid button {
        padding: 0.7rem;
    }

    .mkb-result-main {
        gap: 0.6rem;
    }

    .mkb-result-copy h3 {
        font-size: 0.92rem;
    }

    .mkb-action span {
        font-size: 0.75rem;
    }
}