/* BiloBook CMS — product marketing site */
:root {
    --bks-blue: #003580;
    --bks-blue-dark: #001a40;
    --bks-blue-light: #0071c2;
    --bks-yellow: #febb02;
    --bks-yellow-hover: #f2a900;
    --bks-green: #008009;
    --bks-gray-50: #f8fafc;
    --bks-gray-100: #f1f5f9;
    --bks-gray-200: #e2e8f0;
    --bks-gray-500: #64748b;
    --bks-gray-700: #334155;
    --bks-gray-900: #0f172a;
    --bks-white: #fff;
    --bks-radius: 8px;
    --bks-radius-lg: 16px;
    --bks-shadow: 0 4px 24px rgba(0, 53, 128, .08);
    --bks-shadow-lg: 0 20px 60px rgba(0, 53, 128, .15);
    --bks-font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --bks-max: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--bks-font);
    font-size: 15px;
    color: var(--bks-gray-700);
    background: var(--bks-white);
    line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--bks-blue-light); text-decoration: none; }
a:hover { text-decoration: underline; }

.bks-container {
    max-width: var(--bks-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.bks-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--bks-gray-200);
}
.bks-header-inner {
    max-width: var(--bks-max);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 64px;
}
.bks-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--bks-blue);
    font-weight: 800;
    font-size: 18px;
    text-decoration: none;
    flex-shrink: 0;
}
.bks-logo:hover { text-decoration: none; }
.bks-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--bks-blue);
    color: var(--bks-yellow);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 900;
}
.bks-logo-text em {
    font-style: normal;
    color: var(--bks-gray-500);
    font-weight: 600;
    font-size: 14px;
}
.bks-nav {
    display: flex;
    gap: 24px;
    margin-left: 24px;
}
.bks-nav a {
    color: var(--bks-gray-700);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
}
.bks-nav a:hover { color: var(--bks-blue); }
.bks-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex-shrink: 0;
}
.bks-header-tools {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.bks-lang-dropdown { position: relative; }
.bks-lang-dropdown-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid var(--bks-gray-200);
    border-radius: var(--bks-radius);
    background: var(--bks-white);
    color: var(--bks-gray-700);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}
.bks-lang-dropdown-btn:hover { border-color: var(--bks-blue-light); color: var(--bks-blue); }
.bks-lang-dropdown-btn i { font-size: 10px; transition: transform .2s; }
.bks-lang-dropdown.is-open .bks-lang-dropdown-btn i { transform: rotate(180deg); }
.bks-lang-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 168px;
    list-style: none;
    margin: 0;
    padding: 6px;
    background: var(--bks-white);
    border-radius: 8px;
    box-shadow: var(--bks-shadow-lg);
    border: 1px solid var(--bks-gray-200);
    z-index: 300;
}
.bks-lang-dropdown-menu[hidden] { display: none !important; }
.bks-lang-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    color: var(--bks-gray-700);
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
}
.bks-lang-dropdown-menu a:hover { background: var(--bks-gray-100); }
.bks-lang-dropdown-menu a.active {
    background: rgba(0, 113, 194, .1);
    color: var(--bks-blue);
    font-weight: 600;
}
.bks-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .4);
    z-index: 150;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s;
}
.bks-overlay[hidden] { display: none !important; }
.bks-overlay.is-open { opacity: 1; pointer-events: auto; }
body.bks-nav-open { overflow: hidden; }
.bks-mobile-panel[hidden] { display: none !important; }
.bks-mobile-panel {
    background: var(--bks-white);
    border-top: 1px solid var(--bks-gray-200);
    box-shadow: var(--bks-shadow);
    padding: 16px 20px 20px;
}
.bks-nav-mobile {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}
.bks-nav-mobile a {
    padding: 12px 0;
    color: var(--bks-gray-700);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid var(--bks-gray-100);
}
.bks-mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.bks-mobile-actions .bks-btn-primary,
.bks-mobile-actions .bks-btn-outline,
.bks-mobile-actions .bks-btn-ghost {
    justify-content: center;
    width: 100%;
}
.bks-btn-primary, .bks-btn-outline, .bks-btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--bks-radius);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform .15s, box-shadow .15s;
}
.bks-btn-primary {
    background: var(--bks-blue-light);
    color: var(--bks-white);
}
.bks-btn-primary:hover {
    background: var(--bks-blue);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--bks-shadow);
}
.bks-btn-outline {
    background: var(--bks-white);
    color: var(--bks-blue);
    border: 2px solid var(--bks-blue);
}
.bks-btn-outline:hover {
    background: var(--bks-gray-50);
    text-decoration: none;
}
.bks-btn-ghost {
    background: transparent;
    color: var(--bks-gray-700);
    border: 1px solid var(--bks-gray-200);
}
.bks-btn-ghost:hover { background: var(--bks-gray-100); text-decoration: none; }
.bks-btn-lg { padding: 14px 24px; font-size: 15px; }
.bks-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bks-gray-100);
    border: 1px solid var(--bks-gray-200);
    border-radius: var(--bks-radius);
    font-size: 18px;
    color: var(--bks-blue);
    cursor: pointer;
    padding: 0;
}
.bks-menu-icon-close { display: none; }
.bks-header.nav-open .bks-menu-icon-open { display: none; }
.bks-header.nav-open .bks-menu-icon-close { display: block; }

/* Hero */
.bks-hero {
    position: relative;
    overflow: hidden;
    padding: 48px 0 64px;
    background: linear-gradient(135deg, var(--bks-blue-dark) 0%, var(--bks-blue) 50%, #004a9f 100%);
    color: var(--bks-white);
}
.bks-hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(254,187,2,.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0,113,194,.3) 0%, transparent 40%);
    pointer-events: none;
}
.bks-hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 40px;
    align-items: center;
}
.bks-badge {
    display: inline-block;
    background: rgba(254,187,2,.2);
    color: var(--bks-yellow);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .3px;
    margin-bottom: 16px;
    border: 1px solid rgba(254,187,2,.3);
}
.bks-hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.1;
    margin: 0 0 16px;
    letter-spacing: -.02em;
}
.bks-hero-sub {
    font-size: 17px;
    opacity: .9;
    margin: 0 0 28px;
    max-width: 520px;
    line-height: 1.55;
}
.bks-hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.bks-hero-cta .bks-btn-outline {
    border-color: rgba(255,255,255,.5);
    color: var(--bks-white);
    background: rgba(255,255,255,.1);
}
.bks-hero-cta .bks-btn-outline:hover { background: rgba(255,255,255,.2); }
.bks-hero-cta .bks-btn-ghost {
    border-color: rgba(255,255,255,.3);
    color: rgba(255,255,255,.9);
}
.bks-hero-cta .bks-btn-ghost:hover { background: rgba(255,255,255,.1); }
.bks-hero-preview {
    border-radius: var(--bks-radius-lg);
    overflow: hidden;
    box-shadow: var(--bks-shadow-lg);
    border: 3px solid rgba(255,255,255,.15);
}

/* Sections */
.bks-section {
    padding: 72px 0;
}
.bks-section:nth-child(even) {
    background: var(--bks-gray-50);
}
.bks-section-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--bks-gray-900);
    margin: 0 0 12px;
    letter-spacing: -.02em;
}
.bks-section-sub {
    color: var(--bks-gray-500);
    font-size: 16px;
    margin: 0 0 40px;
}
.bks-intro h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--bks-gray-900);
    margin: 0 0 16px;
}
.bks-lead {
    font-size: 18px;
    color: var(--bks-gray-500);
    max-width: 820px;
    margin: 0;
    line-height: 1.7;
}
.bks-use-label {
    margin: 20px 0 12px;
    font-size: 13px;
    font-weight: 700;
    color: var(--bks-blue);
    text-transform: uppercase;
    letter-spacing: .4px;
}
.bks-usecases {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    max-width: 960px;
}
.bks-usecase {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--bks-gray-100);
    border: 1px solid var(--bks-gray-200);
    color: var(--bks-gray-700);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    min-height: 44px;
    text-align: center;
}
.bks-usecase-link {
    text-decoration: none;
    transition: border-color .2s, background .2s, color .2s, transform .2s;
}
.bks-usecase-link i { color: var(--bks-blue); font-size: 12px; flex-shrink: 0; }
.bks-usecase-link:hover {
    border-color: var(--bks-blue);
    background: rgba(0, 113, 194, .08);
    color: var(--bks-navy);
    transform: translateY(-1px);
}
.bks-use-more { margin-top: 14px; font-size: 14px; font-weight: 600; }
.bks-use-more a { color: var(--bks-blue); text-decoration: none; }
.bks-use-more a:hover { text-decoration: underline; }
@media (min-width: 768px) {
    .bks-usecases { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
    .bks-usecases { grid-template-columns: 1fr; }
}

/* Features */
.bks-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}
.bks-feature-card {
    background: var(--bks-white);
    border: 1px solid var(--bks-gray-200);
    border-radius: var(--bks-radius-lg);
    padding: 28px;
    transition: box-shadow .2s, transform .2s;
}
.bks-section:nth-child(even) .bks-feature-card {
    background: var(--bks-white);
}
.bks-feature-card:hover {
    box-shadow: var(--bks-shadow);
    transform: translateY(-2px);
}
.bks-feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--bks-blue), var(--bks-blue-light));
    color: var(--bks-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}
.bks-feature-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--bks-gray-900);
    margin: 0 0 8px;
}
.bks-feature-card p {
    font-size: 14px;
    color: var(--bks-gray-500);
    margin: 0;
    line-height: 1.55;
}

/* Screenshots */
.bks-screens-section {
    background: var(--bks-gray-900) !important;
    color: var(--bks-white);
}
.bks-screens-section .bks-section-title { color: var(--bks-white); }
.bks-screens-section .bks-section-sub { color: rgba(255,255,255,.65); }
.bks-screens-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.bks-screen-card {
    margin: 0;
    background: rgba(255,255,255,.05);
    border-radius: var(--bks-radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.1);
    transition: transform .2s, border-color .2s;
}
.bks-screen-card:hover {
    transform: translateY(-4px);
    border-color: var(--bks-yellow);
}
.bks-screen-card a { display: block; }
.bks-screen-card img { width: 100%; }
.bks-screen-card figcaption {
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.bks-screen-card strong {
    font-size: 15px;
    color: var(--bks-yellow);
}
.bks-screen-card span {
    font-size: 13px;
    color: rgba(255,255,255,.7);
}

/* Tech */
.bks-tech-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: center;
}
.bks-tech-list {
    list-style: none;
    padding: 0;
    margin: 32px 0 0;
}
.bks-tech-list li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 12px 0;
    border-bottom: 1px solid var(--bks-gray-200);
    font-size: 15px;
}
.bks-tech-list li:last-child { border-bottom: none; }
.bks-tech-list i {
    color: var(--bks-green);
    margin-top: 3px;
    flex-shrink: 0;
}
.bks-tech-visual {
    border-radius: var(--bks-radius-lg);
    overflow: hidden;
    box-shadow: var(--bks-shadow-lg);
}

/* Demo */
.bks-demo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    margin-top: 40px;
}
.bks-demo-card {
    background: var(--bks-white);
    border: 1px solid var(--bks-gray-200);
    border-radius: var(--bks-radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.bks-demo-icon {
    width: 56px;
    height: 56px;
    background: var(--bks-blue);
    color: var(--bks-yellow);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}
.bks-demo-icon.admin { background: #1a1d23; color: var(--bks-yellow); }
.bks-demo-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--bks-gray-900);
    margin: 0;
}
.bks-demo-card p {
    color: var(--bks-gray-500);
    margin: 0;
    flex: 1;
}
.bks-creds {
    display: inline-block;
    background: var(--bks-gray-100);
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--bks-gray-700);
    font-family: 'Consolas', monospace;
}
.bks-demo-card .bks-btn-primary,
.bks-demo-card .bks-btn-outline {
    align-self: flex-start;
    margin-top: 8px;
}

/* CTA band */
.bks-cta-band {
    background: linear-gradient(135deg, var(--bks-blue) 0%, var(--bks-blue-light) 100%);
    color: var(--bks-white);
    padding: 72px 0;
    text-align: center;
}
.bks-cta-band h2 {
    font-size: 28px;
    font-weight: 800;
    margin: 0 0 12px;
}
.bks-cta-band p {
    font-size: 16px;
    opacity: .9;
    max-width: 600px;
    margin: 0 auto 28px;
}
.bks-cta-band .bks-btn-primary {
    background: var(--bks-yellow);
    color: var(--bks-blue-dark);
}
.bks-cta-band .bks-btn-primary:hover {
    background: var(--bks-yellow-hover);
}

/* Footer */
.bks-footer {
    background: var(--bks-gray-900);
    color: rgba(255,255,255,.75);
    padding: 56px 0 24px;
}
.bks-footer-inner {
    max-width: var(--bks-max);
    margin: 0 auto;
    padding: 0 20px;
}
.bks-footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 40px;
}
.bks-footer-brand .bks-logo { color: var(--bks-white); margin-bottom: 16px; }
.bks-footer-brand p {
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
    opacity: .7;
}
.bks-footer h4 {
    color: var(--bks-white);
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 16px;
    text-transform: uppercase;
    letter-spacing: .5px;
}
.bks-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.bks-footer li { margin-bottom: 8px; }
.bks-footer a {
    color: rgba(255,255,255,.7);
    font-size: 13px;
    text-decoration: none;
}
.bks-footer a:hover { color: var(--bks-yellow); }
.bks-footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding-top: 24px;
    font-size: 13px;
    opacity: .6;
    text-align: center;
}

/* Responsive */
@media (max-width: 1024px) {
    .bks-hero-inner { grid-template-columns: 1fr; }
    .bks-hero-preview { order: -1; max-width: 600px; }
    .bks-features-grid { grid-template-columns: repeat(2, 1fr); }
    .bks-tech-layout { grid-template-columns: 1fr; }
    .bks-footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .bks-nav { display: none; }
    .bks-header-actions { display: none; }
    .bks-header-tools { margin-left: auto; }
    .bks-menu-toggle { display: inline-flex; }
    .bks-header-inner { flex-wrap: nowrap; }
    .bks-logo { margin-right: auto; }
    .bks-features-grid,
    .bks-screens-grid,
    .bks-demo-grid { grid-template-columns: 1fr; }
    .bks-hero-cta { flex-direction: column; }
    .bks-hero-cta a { width: 100%; justify-content: center; }
    .bks-footer-grid { grid-template-columns: 1fr; }
    .bks-section { padding: 48px 0; }
}

/* Ecosystem bar + footer chips */
.bks-ecosystem-bar {
    background: linear-gradient(90deg, var(--bks-blue-dark), var(--bks-blue));
    color: #fff;
    font-size: 12px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.bks-ecosystem-bar-inner {
    max-width: var(--bks-max);
    margin: 0 auto;
    padding: 8px 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 10px;
}
.bks-ecosystem-label {
    font-weight: 700;
    letter-spacing: .03em;
    white-space: nowrap;
}
.bks-ecosystem-bar a {
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    padding: 3px 8px;
    border-radius: 999px;
    background: rgba(255,255,255,.12);
    white-space: nowrap;
}
.bks-ecosystem-bar a:hover {
    background: rgba(254, 187, 2, .35);
    text-decoration: none;
}
.bks-footer-ecosystem {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: center;
    padding: 14px 0;
    border-top: 1px solid rgba(255,255,255,.12);
    margin-top: 12px;
    font-size: 12px;
}
.bks-footer-ecosystem span { color: rgba(255,255,255,.75); font-weight: 600; }
.bks-footer-ecosystem a {
    color: #fff;
    text-decoration: none;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,.1);
}
.bks-footer-ecosystem a:hover { background: rgba(254, 187, 2, .3); }
.bks-mobile-ecosystem {
    padding: 12px 0 4px;
    border-top: 1px solid var(--bks-gray-200);
    margin-top: 8px;
}
.bks-mobile-eco-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--bks-blue);
    margin-bottom: 8px;
}
.bks-mobile-eco-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.bks-mobile-eco-links a {
    font-size: 12px;
    font-weight: 600;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--bks-gray-100);
    color: var(--bks-blue-dark);
    text-decoration: none;
}
.bks-mobile-eco-links a:hover { background: rgba(0, 113, 194, .12); }