:root{
    --ink:#1c2237;
    --ink-soft:#5a6178;
    --footer-navy:#1e273e;
    --blue:#1058df;
    --blue-light:#3274f0;
    --violet:#614092;
    --paper:#f7f8fb;
    --paper-line:#e6e8f0;
    --white:#ffffff;

    --font-head:'Poppins', ui-sans-serif, system-ui, sans-serif;
    --font-body:'Inter', ui-sans-serif, system-ui, sans-serif;

    color-scheme: light;
    box-sizing:border-box;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  html{ scroll-padding-top: env(safe-area-inset-top, 0px); scroll-behavior:smooth; }
  *,*::before,*::after{ box-sizing:inherit; }
  body{
    margin:0;
    font-family:var(--font-body);
    color:var(--ink);
    background:var(--paper);
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  ul{ margin:0; padding:0; list-style:none; }
  .wrap{ width:100%; max-width:1140px; margin:0 auto; padding:0 24px; }

  /* ---------- header ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(30,39,62,0.92);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(255,255,255,0.08);
  }
  .nav-row{
    display:flex; align-items:center; justify-content:space-between;
    height:78px;
  }
  .brand{ display:flex; align-items:center; gap:10px; }
  .brand-icon{ height:36px; width:36px; flex:0 0 auto; }
  .brand-word{
    font-family:var(--font-head); font-weight:700; font-size:1.15rem;
    color:var(--white);
  }

  .nav-links{ display:flex; align-items:center; gap:6px; }
  .nav-links a{
    color:rgba(255,255,255,0.82);
    font-size:0.95rem; font-weight:500;
    padding:10px 16px; border-radius:8px;
    transition:background 0.15s ease, color 0.15s ease;
  }
  .nav-links a:hover, .nav-links a:focus-visible{ color:var(--white); background:rgba(255,255,255,0.08); }
  .nav-links a.cta{
    color:var(--white);
    background:var(--blue-light);
    margin-left:6px;
    font-weight:600;
  }
  .nav-links a.cta:hover{ background:var(--blue); }
  .nav-links a.active-link{ color:var(--white); font-weight:600; }

  .nav-toggle{
    display:none; flex-direction:column; gap:5px;
    background:none; border:0; cursor:pointer; padding:8px;
  }
  .nav-toggle span{ width:22px; height:2px; background:var(--white); border-radius:2px; }

  @media (max-width:860px){
    .nav-toggle{ display:flex; }
    .nav-links{
      position:absolute; left:0; right:0; top:78px;
      flex-direction:column; align-items:stretch; gap:2px;
      background:var(--footer-navy);
      border-bottom:1px solid rgba(255,255,255,0.08);
      padding:10px 24px 18px;
      display:none;
    }
    .nav-links.open{ display:flex; }
    .nav-links a{ padding:12px 10px; }
    .nav-links a.cta{ text-align:center; margin-left:0; margin-top:6px; }
  }

  /* ---------- hero ---------- */
  .hero{
    position:relative;
    background: linear-gradient(115deg, var(--blue) 0%, var(--violet) 100%);
    color:var(--white);
    overflow:hidden;
    padding:76px 0 0;
  }
  .hero::before{
    content:"";
    position:absolute; inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.055) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.055) 1px, transparent 1px);
    background-size:44px 44px;
    mask-image:radial-gradient(ellipse 75% 65% at 25% 15%, black, transparent);
    pointer-events:none;
  }
  .hero-inner{
    position:relative; z-index:1;
    display:grid; grid-template-columns:1.15fr 0.85fr; align-items:center; gap:36px;
    padding-bottom:56px;
  }
  @media (max-width:900px){
    .hero-inner{ grid-template-columns:1fr; text-align:center; padding-bottom:36px; }
  }

  .eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    font-size:0.82rem; font-weight:600; letter-spacing:0.02em;
    color:#e8ecff; background:rgba(255,255,255,0.12);
    border:1px solid rgba(255,255,255,0.24);
    padding:6px 12px; border-radius:999px; margin-bottom:22px;
  }
  .eyebrow svg{ width:14px; height:14px; }

  .hero h1{
    font-family:var(--font-head);
    font-weight:700;
    font-size:clamp(2.3rem, 4.6vw, 3.4rem);
    line-height:1.1;
    margin:0 0 18px;
    letter-spacing:-0.01em;
  }
  .hero p.lede{
    font-size:1.15rem;
    color:rgba(255,255,255,0.82);
    max-width:46ch;
    margin:0 0 34px;
  }
  @media (max-width:900px){ .hero p.lede{ margin-left:auto; margin-right:auto; } }

  .badges{ display:flex; gap:14px; flex-wrap:wrap; align-items:center; }
  @media (max-width:900px){ .badges{ justify-content:center; } }
  .badges a{ display:inline-flex; transition:transform 0.15s ease; }
  .badges a:hover{ transform:translateY(-2px); }
  .badges .apple-badge svg{ height:44px; width:auto; }
  .badges .google-badge img{ height:56px; width:auto; border-radius:8px; }

  /* hero visual: real app screenshot */
  .hero-visual{ display:flex; justify-content:center; }
  .phone-shot{
    width:220px;
    border-radius:26px;
    box-shadow:0 30px 80px rgba(10,15,40,0.45), 0 0 0 6px rgba(255,255,255,0.08);
    animation:float 6s ease-in-out infinite;
    overflow:hidden;
  }
  .phone-shot img{ display:block; width:100%; height:auto; }
  @keyframes float{
    0%,100%{ transform:translateY(0); }
    50%{ transform:translateY(-10px); }
  }
  @media (prefers-reduced-motion: reduce){
    .phone-shot{ animation:none; }
  }

  .wave{ display:block; width:100%; height:auto; margin-top:-1px; }

  /* ---------- content ---------- */
  main{ background:var(--paper); }
  .content{ padding:72px 24px 40px; }
  .content .lead-heading{
    font-family:var(--font-head);
    font-weight:600;
    font-size:clamp(1.55rem, 2.8vw, 2.05rem);
    line-height:1.32;
    max-width:40ch;
    margin:0 0 20px;
    color:var(--ink);
  }
  .content p{
    font-size:1.05rem; line-height:1.75; color:var(--ink-soft);
    max-width:70ch; margin:0 0 18px;
  }
  .content a.inline-link{
    color:var(--blue); font-weight:600; border-bottom:1px solid rgba(16,88,223,0.35);
  }
  .content a.inline-link:hover{ border-color:var(--blue); }

  .content-grid{
    display:grid; grid-template-columns:1fr 1fr; gap:32px;
    margin:36px 0 8px;
  }
  @media (max-width:760px){ .content-grid{ grid-template-columns:1fr; } }

  .panel{
    background:var(--white);
    border:1px solid var(--paper-line);
    border-radius:16px;
    padding:28px 26px;
  }
  .panel h3{
    font-family:var(--font-head); font-size:1.05rem; font-weight:600;
    margin:0 0 16px; display:flex; align-items:center; gap:10px; color:var(--ink);
  }
  .panel h3 svg{ width:20px; height:20px; color:var(--blue); flex:0 0 auto; }
  .panel ul{ display:flex; flex-direction:column; gap:12px; }
  .panel ul li{
    font-size:0.98rem; color:var(--ink-soft); line-height:1.5;
    padding-left:22px; position:relative;
  }
  .panel ul.checks li::before{
    content:""; position:absolute; left:0; top:0.45em;
    width:8px; height:8px; border-radius:50%;
    background:var(--blue-light);
  }
  .panel ol{ display:flex; flex-direction:column; gap:14px; counter-reset:step; list-style:none; margin:0; padding:0; }
  .panel ol li{
    font-size:0.98rem; color:var(--ink-soft); line-height:1.5;
    padding-left:34px; position:relative; counter-increment:step;
  }
  .panel ol li::before{
    content:counter(step);
    position:absolute; left:0; top:-2px;
    width:24px; height:24px; border-radius:8px;
    background:var(--footer-navy); color:#8fb3ff;
    font-family:var(--font-head); font-size:0.8rem; font-weight:600;
    display:flex; align-items:center; justify-content:center;
  }

  .closing{
    margin-top:44px; padding-top:32px; border-top:1px solid var(--paper-line);
    color:var(--ink-soft); font-size:1.05rem;
  }

  /* ---------- footer ---------- */
  footer{
    background:var(--footer-navy); color:rgba(255,255,255,0.75);
    margin-top:64px;
  }
  .footer-top{ padding:56px 0 36px; }
  .footer-grid{
    display:grid; grid-template-columns:1fr 1fr 1fr 1fr; gap:32px;
  }
  @media (max-width:860px){
    .footer-grid{ grid-template-columns:1fr 1fr; row-gap:36px; }
  }
  @media (max-width:520px){
    .footer-grid{ grid-template-columns:1fr; }
  }
  .footer-grid h6{
    color:var(--white); font-family:var(--font-head);
    font-size:0.95rem; font-weight:600; margin:0 0 18px;
  }
  .footer-grid ul{ display:flex; flex-direction:column; gap:11px; }
  .footer-grid a{ font-size:0.92rem; color:rgba(255,255,255,0.62); transition:color 0.15s ease; }
  .footer-grid a:hover{ color:#8fb3ff; }

  .social-row{ display:flex; gap:10px; }
  .social-row a{
    width:38px; height:38px; border-radius:10px;
    display:flex; align-items:center; justify-content:center;
    background:rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.10);
    transition:background 0.15s ease, border-color 0.15s ease;
  }
  .social-row a:hover{ background:rgba(50,116,240,0.22); border-color:var(--blue-light); }
  .social-row svg{ width:17px; height:17px; color:var(--white); }

  .footer-bar{
    border-top:1px solid rgba(255,255,255,0.08);
    padding:22px 0;
  }
  .footer-bar .wrap{
    display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  }
  .footer-icon{ height:26px; width:26px; flex:0 0 auto; vertical-align:middle; }
  .footer-word{ margin-left:10px; font-size:1rem; }
  .footer-bar small{ color:rgba(255,255,255,0.5); font-size:0.85rem; margin-left:auto; }

  /* ---------- back to top ---------- */
  #back-to-top{
    position:fixed; right:22px; bottom:22px; z-index:60;
    width:44px; height:44px; border-radius:50%;
    background:var(--blue-light); color:var(--white);
    display:flex; align-items:center; justify-content:center;
    box-shadow:0 10px 24px rgba(16,88,223,0.4);
    opacity:0; pointer-events:none; transform:translateY(8px);
    transition:opacity 0.2s ease, transform 0.2s ease;
    border:0; cursor:pointer;
  }
  #back-to-top.visible{ opacity:1; pointer-events:auto; transform:translateY(0); }
  #back-to-top svg{ width:20px; height:20px; }

  :focus-visible{ outline:2px solid var(--blue-light); outline-offset:2px; }

  /* ---------- page hero (shared across all secondary pages) ---------- */
  .page-hero{
    position:relative;
    background: linear-gradient(115deg, var(--blue) 0%, var(--violet) 100%);
    color:var(--white);
    overflow:hidden;
    padding:70px 0;
    text-align:center;
  }
  .page-hero::before{
    content:"";
    position:absolute; inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.055) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.055) 1px, transparent 1px);
    background-size:44px 44px;
    mask-image:radial-gradient(ellipse 75% 90% at 50% 20%, black, transparent);
    pointer-events:none;
  }
  .page-hero .wrap{ position:relative; z-index:1; }
  .page-hero .eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    font-size:0.82rem; font-weight:600; letter-spacing:0.02em;
    color:#e8ecff; background:rgba(255,255,255,0.12);
    border:1px solid rgba(255,255,255,0.24);
    padding:6px 12px; border-radius:999px; margin-bottom:18px;
  }
  .page-hero h1{
    font-family:var(--font-head); font-weight:700;
    font-size:clamp(2rem, 4.4vw, 2.9rem);
    margin:0 0 12px; letter-spacing:-0.01em;
  }
  .page-hero h1:last-child{ margin-bottom:0; }
  .page-hero p{
    font-size:1.05rem; color:rgba(255,255,255,0.82); max-width:56ch; margin:0 auto;
  }


  /* =====================================================================
     Benten SDK components (shared by index.html, sdk.html, dev-guide.html,
     developers.html). Everything below was added for the SDK launch.
     ===================================================================== */
  :root{
    --code-bg:#161d30;
    --code-ink:#dfe6ff;
    --code-comment:#7f8bb0;
    --code-string:#9be3b4;
    --code-keyword:#8fb3ff;
    --code-type:#f5c97a;
    --ok:#0f7a4f;
  }

  /* nav: highlighted "new" link */
  .nav-links a .nav-new{
    display:inline-block; margin-left:6px; vertical-align:1px;
    font-size:0.66rem; font-weight:700; letter-spacing:0.04em; text-transform:uppercase;
    color:#0b1a3a; background:#8fb3ff; padding:2px 6px; border-radius:999px;
  }

  /* buttons */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    font-family:var(--font-body); font-weight:600; font-size:0.98rem;
    border-radius:999px; padding:12px 22px; cursor:pointer; border:1px solid transparent;
    transition:background 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
    white-space:nowrap;
  }
  .btn svg{ width:16px; height:16px; }
  .btn-primary{ background:var(--blue-light); color:var(--white); }
  .btn-primary:hover{ background:var(--blue); }
  .btn-light{ background:var(--white); color:var(--blue); }
  .btn-light:hover{ background:#eef2ff; }
  .btn-outline-light{ background:transparent; color:var(--white); border-color:rgba(255,255,255,0.45); }
  .btn-outline-light:hover{ background:rgba(255,255,255,0.1); border-color:var(--white); }
  .btn-outline{ background:var(--white); color:var(--ink); border-color:var(--paper-line); }
  .btn-outline:hover{ border-color:var(--blue-light); color:var(--blue); }
  .btn-row{ display:flex; gap:12px; flex-wrap:wrap; align-items:center; }
  @media (max-width:900px){ .hero .btn-row, .page-hero .btn-row{ justify-content:center; } }

  /* announcement pill (hero) */
  .announce{
    display:inline-flex; align-items:center; gap:10px; max-width:100%;
    font-size:0.88rem; font-weight:500; color:var(--white);
    background:rgba(10,16,40,0.28); border:1px solid rgba(255,255,255,0.24);
    padding:5px 14px 5px 5px; border-radius:999px; margin-bottom:22px;
    transition:background 0.15s ease;
  }
  .announce:hover{ background:rgba(10,16,40,0.42); }
  .announce .tag{
    font-size:0.7rem; font-weight:700; letter-spacing:0.05em; text-transform:uppercase;
    background:#8fb3ff; color:#0b1a3a; padding:4px 9px; border-radius:999px; flex:0 0 auto;
  }
  .announce .arrow{ opacity:0.8; }
  .hero .hero-actions{ margin:0 0 26px; }
  .hero .hero-note{ font-size:0.86rem; color:rgba(255,255,255,0.7); margin:0 0 12px; }

  /* section headings */
  .section{ padding:8px 0 24px; }
  .section + .section{ margin-top:56px; }
  .section-kicker{
    font-family:var(--font-head); font-size:0.8rem; font-weight:600; letter-spacing:0.06em;
    text-transform:uppercase; color:var(--blue-light); margin:0 0 8px;
  }
  .section-title{
    font-family:var(--font-head); font-weight:600; color:var(--ink);
    font-size:clamp(1.45rem, 2.6vw, 1.9rem); line-height:1.3; margin:0 0 12px; max-width:34ch;
  }
  .content .section-intro{ margin-bottom:28px; }

  /* card grid */
  .card-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:22px; }
  .card-grid.two{ grid-template-columns:repeat(2, 1fr); }
  @media (max-width:900px){ .card-grid{ grid-template-columns:1fr 1fr; } }
  @media (max-width:640px){ .card-grid, .card-grid.two{ grid-template-columns:1fr; } }
  .card{
    background:var(--white); border:1px solid var(--paper-line); border-radius:16px;
    padding:24px 22px; display:flex; flex-direction:column; min-width:0;
  }
  .card .card-icon{
    width:40px; height:40px; border-radius:10px; margin-bottom:16px;
    display:flex; align-items:center; justify-content:center;
    background:rgba(16,88,223,0.08); color:var(--blue);
  }
  .card .card-icon svg{ width:20px; height:20px; }
  .card h3{ font-family:var(--font-head); font-weight:600; font-size:1.08rem; margin:0 0 8px; color:var(--ink); }
  .content .card p{ font-size:0.96rem; line-height:1.6; margin:0 0 12px; }
  .card .card-foot{ margin-top:auto; padding-top:8px; font-size:0.9rem; }
  .card .card-foot a{ color:var(--blue); font-weight:600; }
  .card .card-foot a:hover{ color:var(--violet); }
  .card ul.checks{ display:flex; flex-direction:column; gap:8px; margin:0 0 12px; }
  .card ul.checks li{ font-size:0.94rem; color:var(--ink-soft); line-height:1.5; padding-left:20px; position:relative; }
  .card ul.checks li::before{
    content:""; position:absolute; left:0; top:0.5em; width:7px; height:7px; border-radius:50%; background:var(--blue-light);
  }

  /* status chips */
  .chip{
    display:inline-flex; align-items:center; gap:6px; font-size:0.74rem; font-weight:700;
    letter-spacing:0.03em; text-transform:uppercase; padding:4px 10px; border-radius:999px;
    align-self:flex-start; margin-bottom:12px;
  }
  .chip.open{ background:rgba(15,122,79,0.1); color:var(--ok); }
  .chip.binary{ background:rgba(97,64,146,0.1); color:var(--violet); }
  .chip.hosted{ background:rgba(28,34,55,0.08); color:var(--ink); }
  .chip.app{ background:rgba(16,88,223,0.08); color:var(--blue); }

  /* inline code + code blocks */
  .content code, .card code{
    font-family:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
    font-size:0.88em; background:rgba(16,88,223,0.07); color:var(--blue);
    padding:2px 6px; border-radius:5px; overflow-wrap:anywhere;
  }
  .code-block{
    position:relative; background:var(--code-bg); border-radius:14px; overflow:hidden;
    border:1px solid rgba(255,255,255,0.06); min-width:0;
  }
  .code-block .code-head{
    display:flex; align-items:center; justify-content:space-between; gap:10px;
    padding:8px 10px 8px 16px; border-bottom:1px solid rgba(255,255,255,0.08);
    font-size:0.78rem; color:rgba(255,255,255,0.55); font-weight:600; letter-spacing:0.02em;
  }
  .code-block pre{
    margin:0; padding:16px 18px; overflow-x:auto; color:var(--code-ink);
    font-size:0.85rem; line-height:1.65;
  }
  .code-block pre code{
    font-family:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
    background:none; color:inherit; padding:0; font-size:inherit; overflow-wrap:normal;
  }
  .copy-btn{
    background:rgba(255,255,255,0.08); border:1px solid rgba(255,255,255,0.14); color:#fff;
    font-size:0.74rem; font-weight:600; border-radius:7px; padding:5px 10px; cursor:pointer;
    font-family:var(--font-body);
  }
  .copy-btn:hover{ background:rgba(255,255,255,0.16); }
  .tok-c{ color:var(--code-comment); font-style:italic; }
  .tok-s{ color:var(--code-string); }
  .tok-k{ color:var(--code-keyword); }
  .tok-t{ color:var(--code-type); }

  /* tabs */
  .tabs{ min-width:0; }
  .tab-list{ display:flex; gap:4px; flex-wrap:wrap; margin-bottom:10px; }
  .tab-list button{
    font-family:var(--font-body); font-size:0.88rem; font-weight:600; color:var(--ink-soft);
    background:transparent; border:1px solid transparent; border-radius:999px; padding:8px 14px; cursor:pointer;
  }
  .tab-list button:hover{ color:var(--blue); }
  .tab-list button[aria-selected="true"]{ background:var(--white); border-color:var(--paper-line); color:var(--ink); }
  .tab-panel[hidden]{ display:none; }
  .tab-panel > p{ font-size:0.95rem !important; margin:12px 0 0 !important; }

  /* numbered steps */
  .steps{ display:flex; flex-direction:column; gap:26px; counter-reset:sdkstep; }
  .step{ display:grid; grid-template-columns:40px 1fr; gap:18px; counter-increment:sdkstep; min-width:0; }
  .step::before{
    content:counter(sdkstep);
    width:36px; height:36px; border-radius:10px; background:var(--footer-navy); color:#8fb3ff;
    font-family:var(--font-head); font-weight:600; display:flex; align-items:center; justify-content:center;
  }
  .step > div{ min-width:0; }
  .step h3{ font-family:var(--font-head); font-weight:600; font-size:1.08rem; margin:6px 0 8px; color:var(--ink); }
  .content .step p{ font-size:0.98rem; margin:0 0 12px; }
  @media (max-width:520px){ .step{ grid-template-columns:1fr; gap:10px; } }

  /* architecture flow */
  .flow{
    display:grid; grid-template-columns:1fr auto 1fr auto 1fr auto 1fr; align-items:stretch; gap:10px;
    margin:8px 0 14px;
  }
  .flow-node{
    background:var(--white); border:1px solid var(--paper-line); border-radius:14px; padding:16px 14px;
    display:flex; flex-direction:column; gap:6px; min-width:0;
  }
  .flow-node .who{ font-size:0.72rem; font-weight:700; letter-spacing:0.05em; text-transform:uppercase; color:var(--ink-soft); }
  .flow-node strong{ font-family:var(--font-head); font-weight:600; font-size:0.98rem; color:var(--ink); }
  .flow-node span.desc{ font-size:0.86rem; color:var(--ink-soft); line-height:1.45; }
  .flow-node.you{ border-color:rgba(16,88,223,0.35); box-shadow:inset 0 0 0 1px rgba(16,88,223,0.12); }
  .flow-node.benten{ background:var(--footer-navy); border-color:var(--footer-navy); }
  .flow-node.benten .who{ color:rgba(255,255,255,0.55); }
  .flow-node.benten strong{ color:var(--white); }
  .flow-node.benten span.desc{ color:rgba(255,255,255,0.72); }
  .flow-arrow{ display:flex; align-items:center; justify-content:center; color:var(--blue-light); }
  .flow-arrow svg{ width:22px; height:22px; }
  @media (max-width:900px){
    .flow{ grid-template-columns:1fr; }
    .flow-arrow svg{ transform:rotate(90deg); }
  }
  .flow-legend{ font-size:0.88rem !important; color:var(--ink-soft); }

  /* table */
  .sdk-table-wrap{ overflow-x:auto; border:1px solid var(--paper-line); border-radius:14px; background:var(--white); }
  .sdk-table{ width:100%; border-collapse:collapse; font-size:0.93rem; min-width:520px; }
  .sdk-table th{
    text-align:left; font-family:var(--font-head); font-weight:600; font-size:0.76rem; letter-spacing:0.04em;
    text-transform:uppercase; color:var(--ink-soft); background:var(--paper); padding:11px 16px;
    border-bottom:1px solid var(--paper-line);
  }
  .sdk-table td{ padding:12px 16px; border-bottom:1px solid var(--paper-line); color:var(--ink-soft); vertical-align:top; line-height:1.5; }
  .sdk-table tr:last-child td{ border-bottom:0; }
  .sdk-table td:first-child{ color:var(--ink); font-weight:600; white-space:nowrap; }

  /* callout */
  .callout{
    display:flex; gap:14px; align-items:flex-start;
    background:rgba(16,88,223,0.06); border:1px solid rgba(16,88,223,0.2);
    border-radius:14px; padding:16px 18px; margin:0 0 24px;
  }
  .callout svg{ width:20px; height:20px; flex:0 0 auto; color:var(--blue); margin-top:2px; }
  .content .callout p{ font-size:0.95rem; margin:0; line-height:1.6; max-width:none; }
  .callout a{ color:var(--blue); font-weight:600; }
  .callout.warn{ background:rgba(245,166,35,0.08); border-color:rgba(245,166,35,0.35); }
  .callout.warn svg{ color:#b36b00; }

  /* split: text + code */
  .split{ display:grid; grid-template-columns:1fr 1.1fr; gap:36px; align-items:center; }
  @media (max-width:900px){ .split{ grid-template-columns:1fr; gap:24px; } }
  .split > *{ min-width:0; }

  /* SDK promo band (home page) */
  .sdk-band{
    background:var(--white); border:1px solid var(--paper-line); border-radius:20px;
    padding:36px 34px; margin:0 0 56px; position:relative; overflow:hidden;
  }
  .sdk-band::before{
    content:""; position:absolute; left:0; top:0; bottom:0; width:5px;
    background:linear-gradient(180deg, var(--blue) 0%, var(--violet) 100%);
  }
  @media (max-width:640px){ .sdk-band{ padding:26px 20px; } }
  .platform-row{ display:flex; flex-wrap:wrap; gap:8px; margin:0 0 22px; }
  .platform-pill{
    display:inline-flex; align-items:center; gap:7px; font-size:0.86rem; font-weight:600; color:var(--ink);
    background:var(--paper); border:1px solid var(--paper-line); padding:6px 12px; border-radius:999px;
  }
  .platform-pill svg{ width:15px; height:15px; color:var(--blue); }

  /* FAQ */
  .faq{ display:flex; flex-direction:column; gap:10px; max-width:820px; }
  .faq details{ background:var(--white); border:1px solid var(--paper-line); border-radius:12px; padding:0 18px; }
  .faq summary{
    cursor:pointer; list-style:none; padding:16px 0; font-weight:600; color:var(--ink);
    display:flex; justify-content:space-between; gap:12px; align-items:center;
  }
  .faq summary::-webkit-details-marker{ display:none; }
  .faq summary::after{ content:"+"; font-size:1.2rem; color:var(--blue-light); flex:0 0 auto; }
  .faq details[open] summary::after{ content:"\2212"; }
  .content .faq details p{ font-size:0.96rem; margin:0 0 16px; }

  /* CTA band */
  .cta-band{
    background:linear-gradient(115deg, var(--blue) 0%, var(--violet) 100%);
    border-radius:20px; padding:40px 36px; color:var(--white);
    display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap;
  }
  .cta-band h2{ font-family:var(--font-head); font-weight:600; font-size:clamp(1.3rem, 2.4vw, 1.7rem); margin:0 0 6px; }
  .content .cta-band p{ color:rgba(255,255,255,0.82); margin:0; font-size:1rem; }