:root {
    --bg: #f7f8fa;
    --surface: #ffffff;
    --surface-muted: #f0f2f5;
    --text: #111418;
    --text-muted: #5d6670;
    --border: #dfe3e8;
    --dark: #101216;
    --dark-surface: #181b20;
    --accent: #15191f;
    --radius: 18px;
    --max-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

code {
    font-family:
        "SFMono-Regular",
        Consolas,
        "Liberation Mono",
        monospace;
}

.container {
    width: min(
        calc(100% - 40px),
        var(--max-width)
    );
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(223, 227, 232, 0.85);
    background: rgba(247, 248, 250, 0.92);
    backdrop-filter: blur(18px);
}

.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 26px;
    color: var(--text-muted);
    font-size: 0.94rem;
}

.nav a:hover {
    color: var(--text);
}

.hero {
    padding: 96px 0 88px;
}

.hero-copy,
.hero-architecture {
    min-width: 0;
}

.hero-grid {
    display: grid;
    grid-template-columns:
        minmax(0, 1.15fr)
        minmax(360px, 0.85fr);
    gap: 72px;
    align-items: center;
}

.eyebrow,
.section-label {
    margin: 0 0 14px;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.76rem;
    font-weight: 800;
    color: var(--text-muted);
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    max-width: 820px;
    margin-bottom: 24px;
    font-size: clamp(
        3rem,
        6vw,
        5.9rem
    );
    line-height: 0.98;
    letter-spacing: -0.06em;
}

h2 {
    max-width: 780px;
    margin-bottom: 20px;
    font-size: clamp(
        2.2rem,
        4vw,
        4rem
    );
    line-height: 1.02;
    letter-spacing: -0.045em;
}

h3 {
    margin-bottom: 10px;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}

.hero-lead,
.section-intro {
    max-width: 760px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.hero-lead {
    max-width: 690px;
    margin-bottom: 32px;
    font-size: 1.18rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 34px;
}

.button {
    min-height: 48px;
    padding: 0 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid var(--border);
    font-weight: 700;
    transition:
        transform 120ms ease,
        background 120ms ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--dark);
    color: #ffffff;
    border-color: var(--dark);
}

.button-secondary {
    background: var(--surface);
}

.install-card,
.code-card {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 14px;
}

.install-card {
    max-width: 780px;
    overflow: hidden;
}

.install-card-header {
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.82rem;
}

.version-badge {
    font-weight: 700;
    color: var(--text);
}

.command-row,
.code-card {
    display: flex;
    align-items: center;
    gap: 14px;
}

.command-row {
    padding: 16px;
}

.command-row code,
.code-card code {
    min-width: 0;
    flex: 1;
    overflow-x: auto;
    white-space: nowrap;
    font-size: 0.84rem;
}

.copy-button {
    flex: 0 0 auto;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-muted);
    color: var(--text);
    cursor: pointer;
    font-weight: 700;
}

.copy-button:hover {
    background: #e7eaf0;
}

.architecture-card {
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--surface);
    box-shadow: 0 30px 80px rgba(12, 16, 22, 0.08);
}

.architecture-source,
.architecture-rbek,
.architecture-result,
.control-box {
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    font-weight: 750;
}

.architecture-source {
    background: var(--surface-muted);
}

.architecture-rbek {
    background: var(--dark);
    color: #ffffff;
    font-size: 1.35rem;
}

.architecture-result {
    border: 1px solid var(--border);
}

.architecture-arrow {
    padding: 10px 0;
    text-align: center;
    color: var(--text-muted);
}

.architecture-controls {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 9px;
}

.control-box {
    border: 1px solid var(--border);
    font-size: 0.88rem;
}

.section {
    padding: 92px 0;
}

.section-muted {
    background: var(--surface-muted);
}

.feature-grid {
    margin-top: 42px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card,
.step-card,
.quickstart-step {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.feature-card {
    padding: 26px;
}

.feature-card p,
.step-card p {
    margin-bottom: 0;
    color: var(--text-muted);
}

.steps-grid {
    margin-top: 42px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}

.step-card {
    min-height: 220px;
    padding: 22px;
}

.step-number {
    display: inline-block;
    margin-bottom: 44px;
    color: var(--text-muted);
    font-family: monospace;
    font-size: 0.85rem;
}

.quickstart-grid {
    margin-top: 42px;
    display: grid;
    gap: 16px;
}

.quickstart-step {
    padding: 20px;
}

.quickstart-step-header {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.quickstart-step-header span {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--dark);
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 800;
}

.quickstart-step-header h3 {
    margin: 0;
}

.code-card {
    padding: 14px;
    background: #f7f8fa;
}

.code-card-tall {
    align-items: flex-start;
}

.code-card-tall code {
    white-space: normal;
}

.quickstart-result {
    margin-top: 20px;
    padding: 18px 20px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
}

.status-dot {
    width: 9px;
    height: 9px;
    margin-right: 8px;
    display: inline-block;
    border-radius: 50%;
    background: currentColor;
}

.section-dark {
    background: var(--dark);
    color: #ffffff;
}

.evidence-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: start;
}

.section-label-dark,
.section-intro-dark {
    color: #9ca5b0;
}

.evidence-list {
    border-top: 1px solid #30353d;
}

.evidence-item {
    padding: 18px 0;
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 14px;
    border-bottom: 1px solid #30353d;
}

.evidence-item span {
    color: #7f8995;
    font-family: monospace;
}

.evidence-item code {
    overflow-wrap: anywhere;
}

.cta-section {
    padding-top: 72px;
    padding-bottom: 72px;
}

.cta-card {
    padding: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    border-radius: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
}

.cta-card h2 {
    max-width: 760px;
    margin-bottom: 12px;
}

.cta-card p:last-child {
    margin-bottom: 0;
    color: var(--text-muted);
}

.site-footer {
    padding: 48px 0;
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 32px;
}

.footer-inner p {
    max-width: 520px;
    margin: 8px 0 0;
    color: var(--text-muted);
}

.footer-meta {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.88rem;
}

@media (max-width: 1000px) {
    .hero-grid,
    .evidence-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 720px) {
    .nav {
        display: none;
    }

    .hero {
        padding-top: 68px;
    }

    .section {
        padding: 68px 0;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }

    .architecture-controls {
        grid-template-columns: 1fr;
    }

    .quickstart-result,
    .cta-card,
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-meta {
        flex-direction: column;
        gap: 6px;
    }
}

/* RBEK-QUICKSTART-006B-START */

.quickstart-section .section-intro {
    max-width: 760px;
}

.quickstart-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-top: 36px;
}

.quickstart-card {
    min-width: 0;
}

.quickstart-card .code-card {
    margin-top: 20px;
}

.execution-result-card {
    margin-top: 32px;
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--surface);
}

.execution-result-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
    margin-top: 18px;
}

.execution-result-grid div {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
}

.execution-result-grid span {
    display: block;
    margin-bottom: 8px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
}

.execution-result-grid strong {
    display: block;
    font-size: 1rem;
}

.getting-started-evidence {
    margin-top: 32px;
}

.getting-started-evidence h3 {
    margin-bottom: 16px;
}

.getting-started-evidence .evidence-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.getting-started-evidence .evidence-list code {
    display: block;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-soft);
    overflow-wrap: anywhere;
}

.privacy-note {
    margin-top: 28px;
    padding: 18px 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
    line-height: 1.65;
}

@media (max-width: 1000px) {
    .execution-result-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .quickstart-grid {
        grid-template-columns: 1fr;
    }

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

    .getting-started-evidence .evidence-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .execution-result-grid {
        grid-template-columns: 1fr;
    }
}

/* RBEK-QUICKSTART-006B-END */

/* RBEK-PRODUCT-007A1-START */

/*
 * Public quickstart command UX.
 *
 * Goals:
 * - commands never escape their cards;
 * - Copy action remains visible;
 * - long commands scroll horizontally inside the card;
 * - quickstart uses available desktop width;
 * - mobile remains single-column.
 */

.quickstart-section > .container {
    width: min(1180px, calc(100% - 48px));
    max-width: 1180px;
}

.quickstart-grid {
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
}

.quickstart-card {
    min-width: 0;
    width: 100%;
    overflow: hidden;
}

.quickstart-card .code-card {
    display: block;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    padding: 0;
}

.quickstart-card .code-card-header {
    display: flex;
    width: 100%;
    min-width: 0;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 14px;
    box-sizing: border-box;
}

.quickstart-card .code-card-header > span {
    min-width: 0;
    flex: 1 1 auto;
}

.quickstart-card .copy-button {
    flex: 0 0 auto;
    white-space: nowrap;
}

.quickstart-card .code-card pre {
    display: block;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    margin: 0;
    padding: 16px;
    box-sizing: border-box;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: pre;
    -webkit-overflow-scrolling: touch;
}

.quickstart-card .code-card pre code {
    display: inline-block;
    min-width: max-content;
    max-width: none;
    white-space: pre;
    overflow-wrap: normal;
    word-break: normal;
}

.execution-result-card,
.getting-started-evidence,
.privacy-note {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

@media (max-width: 900px) {
    .quickstart-section > .container {
        width: min(100% - 32px, 760px);
    }

    .quickstart-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .quickstart-section > .container {
        width: calc(100% - 24px);
    }

    .quickstart-card .code-card-header {
        padding: 10px 12px;
    }

    .quickstart-card .code-card pre {
        padding: 14px 12px;
    }
}

/* RBEK-PRODUCT-007A1-END */

/* RBEK-PRODUCT-007A2-START */

/*
 * Visual polish for public quickstart code blocks.
 *
 * Horizontal scrolling remains fully available via:
 * - mouse wheel / shift-wheel
 * - trackpad
 * - touch
 * - keyboard
 *
 * Native scrollbar chrome is hidden for a cleaner product UI.
 */

.quickstart-card .code-card pre {
    padding: 18px 16px 20px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.quickstart-card .code-card pre::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

.quickstart-card .code-card {
    border-radius: 14px;
}

.quickstart-card .code-card-header {
    min-height: 54px;
}

.quickstart-card .copy-button {
    min-width: 56px;
    text-align: center;
}

@media (max-width: 520px) {
    .quickstart-card .code-card pre {
        padding: 16px 12px 18px;
    }

    .quickstart-card .code-card-header {
        min-height: 50px;
    }
}

/* RBEK-PRODUCT-007A2-END */