:root {
    --kb-bg: #f6f6f4;
    --kb-surface: #ffffff;
    --kb-border: rgba(24, 24, 27, 0.1);
    --kb-ink: #18181b;
    --kb-accent: #5b6cfa;
    --kb-accent-soft: #a5b0f8;
    --kb-gradient: linear-gradient(135deg, #1f1f23 0%, #3f3f46 55%, #4c5fd5 140%);
    --kb-text: #18181b;
    --kb-muted: #71717a;
    --kb-radius: 16px;
    --kb-max: 1120px;
}

.kb-page {
    background: var(--kb-bg);
    color: var(--kb-text);
    min-height: 100vh;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    line-height: 1.6;
}

.kb-page::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 14% 8%, rgba(91, 108, 250, 0.05), transparent 40%),
        radial-gradient(circle at 86% 16%, rgba(0, 0, 0, 0.03), transparent 36%),
        linear-gradient(180deg, #fafafa 0%, #f6f6f4 52%, #f0f0ee 100%);
    pointer-events: none;
    z-index: 0;
}

.kb-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(14px);
    background: rgba(255, 255, 255, 0.84);
    border-bottom: 1px solid var(--kb-border);
}

.kb-nav-inner {
    max-width: var(--kb-max);
    margin: 0 auto;
    padding: 16px 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.kb-logo.logo.depth-text {
    --depth-text-perspective: 600px;
    --depth-text-font-size: 32px;
    --depth-text-font-weight: 900;
    --depth-text-face-color: #18181b;
    --depth-text-depth-color: #8b93b8;
    --depth-text-shadow: 0 8px 16px rgba(24, 24, 27, 0.12), 0 2px 6px rgba(91, 108, 250, 0.1);
    text-decoration: none;
    flex-shrink: 0;
}

.depth-text {
    display: inline-block;
    perspective: var(--depth-text-perspective);
    perspective-origin: 50% 48%;
    isolation: isolate;
}

.depth-text__stage {
    position: relative;
    display: inline-grid;
    place-items: center;
    transform-style: preserve-3d;
    transform: rotateX(-1.6deg) rotateY(2.1deg);
    transform-origin: 50% 50%;
    will-change: transform;
}

.depth-text__layer,
.depth-text__face {
    grid-area: 1 / 1;
    display: inline-block;
    font-size: var(--depth-text-font-size);
    font-weight: var(--depth-text-font-weight);
    line-height: 0.86;
    letter-spacing: -0.04em;
    white-space: nowrap;
    user-select: none;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    font-kerning: normal;
    text-rendering: geometricPrecision;
}

.depth-text__layer {
    position: absolute;
    inset: 0;
    z-index: 0;
    filter: saturate(0.95) brightness(0.92);
    pointer-events: none;
}

.depth-text__face {
    position: relative;
    z-index: 1;
    color: var(--depth-text-face-color);
    text-shadow: var(--depth-text-shadow);
    transform: translateZ(0.6px);
}

@media (prefers-reduced-motion: reduce) {
    .depth-text__stage {
        will-change: auto;
    }
}

.kb-nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
}

.kb-nav-links a {
    color: var(--kb-muted);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.kb-nav-links a:hover {
    color: var(--kb-ink);
}

.kb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s, background 0.2s;
}

.kb-btn-primary {
    background: var(--kb-ink);
    color: #fff;
    box-shadow: 0 10px 28px rgba(24, 24, 27, 0.18);
}

.kb-btn-primary:hover {
    transform: translateY(-2px);
    background: #27272a;
    box-shadow: 0 14px 32px rgba(91, 108, 250, 0.2);
}

.kb-btn-ghost {
    background: #fff;
    color: var(--kb-ink);
    border: 1px solid var(--kb-border);
}

.kb-btn-ghost:hover {
    background: #f4f4f5;
    border-color: rgba(91, 108, 250, 0.2);
}

.kb-section {
    position: relative;
    z-index: 1;
    max-width: var(--kb-max);
    margin: 0 auto;
    padding: 80px 5%;
}

.kb-hero {
    padding-top: 100px;
    padding-bottom: 60px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.kb-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid rgba(24, 24, 27, 0.12);
    background: #fff;
    color: var(--kb-muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.kb-hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--kb-ink);
}

.kb-hero h1 span {
    background: linear-gradient(135deg, #18181b 30%, #5b6cfa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.kb-hero-lead {
    font-size: 18px;
    color: var(--kb-muted);
    max-width: 520px;
    margin-bottom: 32px;
}

.kb-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 28px;
}

.kb-hero-hint {
    font-size: 13px;
    color: var(--kb-muted);
}

.kb-hero-hint code {
    padding: 2px 8px;
    border-radius: 6px;
    background: rgba(24, 24, 27, 0.06);
    color: var(--kb-ink);
}

.kb-hero-panel {
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 24px;
    padding: 28px;
    box-shadow: 0 16px 40px rgba(24, 24, 27, 0.06);
}

.kb-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.kb-modal.is-open {
    opacity: 1;
    visibility: visible;
}

.kb-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(6px);
}

.kb-modal-dialog {
    position: relative;
    width: min(100%, 380px);
    background: #fff;
    border: 1px solid var(--kb-border);
    border-radius: 24px;
    padding: 28px 24px 24px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
    transform: translateY(16px) scale(0.96);
    transition: transform 0.25s ease;
    color: var(--kb-ink);
}

.kb-modal.is-open .kb-modal-dialog {
    transform: translateY(0) scale(1);
}

.kb-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    color: var(--kb-ink);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s;
}

.kb-modal-close:hover {
    background: rgba(0, 0, 0, 0.1);
}

body.kb-modal-open {
    overflow: hidden;
}

.kb-add-bot {
    text-align: center;
}

.kb-add-bot-head h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.kb-add-bot-head p {
    font-size: 14px;
    color: var(--kb-muted);
    margin-bottom: 22px;
}

.kb-qrcode-wrap {
    display: inline-block;
    padding: 16px;
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
    margin-bottom: 20px;
}

.kb-qrcode {
    display: block;
    width: 220px;
    height: 220px;
    object-fit: contain;
}

.kb-add-steps {
    text-align: left;
    padding-left: 20px;
    color: var(--kb-muted);
    font-size: 13px;
    line-height: 1.7;
}

.kb-add-steps li {
    margin-bottom: 6px;
}

.kb-menu-preview {
    background: #f4f4f5;
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--kb-border);
}

.kb-menu-title {
    font-size: 13px;
    color: var(--kb-muted);
    margin-bottom: 16px;
}

.kb-menu-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.kb-menu-btn {
    padding: 12px 10px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid rgba(24, 24, 27, 0.1);
    color: var(--kb-ink);
    font-size: 13px;
    font-weight: 600;
    text-align: center;
}

.kb-menu-btn:hover {
    border-color: rgba(91, 108, 250, 0.35);
    color: var(--kb-accent);
}

.kb-section-head {
    margin-bottom: 40px;
}

.kb-section-head h2 {
    font-size: clamp(28px, 4vw, 38px);
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.kb-section-head p {
    color: var(--kb-muted);
    max-width: 640px;
}

.kb-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.kb-highlight {
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    padding: 24px 20px;
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
}

.kb-highlight:hover {
    border-color: rgba(24, 24, 27, 0.18);
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(24, 24, 27, 0.08);
}

.kb-highlight-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: #18181b;
    display: grid;
    place-items: center;
    color: #fff;
    margin-bottom: 16px;
}

.kb-highlight:hover .kb-highlight-icon {
    background: var(--kb-accent);
}

.kb-highlight h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.kb-highlight p {
    font-size: 13px;
    color: var(--kb-muted);
    line-height: 1.55;
}

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

.kb-module {
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    overflow: hidden;
}

.kb-module summary {
    list-style: none;
    cursor: pointer;
    padding: 22px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-weight: 700;
    font-size: 17px;
}

.kb-module summary::-webkit-details-marker {
    display: none;
}

.kb-module-num {
    font-size: 12px;
    font-weight: 700;
    color: var(--kb-muted);
    letter-spacing: 0.06em;
}

.kb-module-chevron {
    color: var(--kb-muted);
    transition: transform 0.25s;
}

.kb-module[open] .kb-module-chevron {
    transform: rotate(180deg);
}

.kb-module-body {
    padding: 0 24px 24px;
    border-top: 1px solid var(--kb-border);
}

.kb-module-body ul {
    padding: 20px 0 0 18px;
    color: var(--kb-muted);
}

.kb-module-body li {
    margin-bottom: 10px;
    font-size: 14px;
}

.kb-module-body li strong {
    color: var(--kb-ink);
    font-weight: 600;
}

.kb-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.kb-step {
    position: relative;
    padding: 24px 20px;
    border-radius: var(--kb-radius);
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
}

.kb-step-num {
    font-size: 11px;
    font-weight: 800;
    color: var(--kb-ink);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.kb-step h3 {
    font-size: 15px;
    margin-bottom: 8px;
}

.kb-step p {
    font-size: 13px;
    color: var(--kb-muted);
}

.kb-audience {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.kb-audience-card {
    padding: 28px 24px;
    border-radius: var(--kb-radius);
    background: #fff;
    border: 1px solid var(--kb-border);
    box-shadow: 0 8px 24px rgba(24, 24, 27, 0.04);
}

.kb-audience-card h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--kb-ink);
}

.kb-audience-card:hover {
    border-color: rgba(91, 108, 250, 0.28);
}

.kb-audience-card p {
    font-size: 14px;
    color: var(--kb-muted);
}

.kb-commands {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.kb-command {
    padding: 8px 14px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--kb-border);
    font-size: 13px;
    color: var(--kb-ink);
}

.kb-tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.kb-tool-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 24px;
    border-radius: var(--kb-radius);
    border: 1px solid var(--kb-border);
    background: var(--kb-surface);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.kb-tool-card:hover {
    border-color: rgba(91, 108, 250, 0.35);
    box-shadow: 0 12px 32px rgba(24, 24, 27, 0.08);
    transform: translateY(-2px);
}

.kb-tool-card h3 {
    font-size: 18px;
    margin: 0;
}

.kb-tool-card p {
    flex: 1;
    margin: 0;
    color: var(--kb-muted);
    font-size: 14px;
    line-height: 1.65;
}

.kb-tool-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--kb-accent);
}

.kb-cta {
    text-align: center;
    padding: 72px 5%;
    margin: 0 5% 60px;
    border-radius: 28px;
    background: linear-gradient(135deg, #18181b 0%, #27272a 62%, #3b4588 120%);
    color: #fff;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.kb-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 0%, rgba(255, 255, 255, 0.1), transparent 55%);
    pointer-events: none;
}

.kb-cta-inner {
    position: relative;
}

.kb-cta h2 {
    font-size: clamp(26px, 4vw, 36px);
    margin-bottom: 12px;
}

.kb-cta p {
    opacity: 0.82;
    margin-bottom: 28px;
}

.kb-cta .kb-btn-ghost {
    background: #fff;
    border-color: #fff;
    color: #18181b;
}

.kb-cta .kb-btn-ghost:hover {
    background: #f4f4f5;
}

.kb-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--kb-border);
    padding: 40px 5% 48px;
    text-align: center;
    color: var(--kb-muted);
    font-size: 14px;
}

.kb-footer a {
    color: var(--kb-ink);
    text-decoration: none;
    font-weight: 600;
}

.kb-footer a:hover {
    color: var(--kb-accent);
}

@media (max-width: 960px) {
    .kb-hero {
        grid-template-columns: 1fr;
    }

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

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

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

    .kb-nav-links {
        display: none;
    }
}

@media (max-width: 560px) {
    .kb-highlights,
    .kb-steps,
    .kb-menu-grid,
    .kb-tool-grid {
        grid-template-columns: 1fr;
    }
}