:root{
  --paper:#FBFCFE;--surface:#FFFFFF;--sunk:#F2F4F9;--ink:#111C3E;--soft:#3B4663;--mute:#6B7590;
  --rule:#DFE3ED;--rule2:#EBEEF5;--go:#2E4C85;--go-bg:#EAEFF9;--go-rule:#BCC9E8;
  --amber:#F8B004;--amber-ink:#092263;--acc:#96690A;--acc-bg:#FBF2E0;--warn:#96302A;--warn-bg:#FAECEA;
  --shadow:0 1px 2px rgba(9,34,99,.06),0 8px 24px -12px rgba(9,34,99,.18);
  --shadow-lift:0 2px 4px rgba(9,34,99,.08),0 18px 40px -16px rgba(9,34,99,.32);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#071433;--surface:#0D2054;--sunk:#132C5C;--ink:#F0F3F9;--soft:#B7BFC9;--mute:#8592A0;
  --rule:#1D3670;--rule2:#17305F;--go:#7FC6CD;--go-bg:#0F2757;--go-rule:#2E4C85;
  --acc:#D9A63C;--acc-bg:#1A2B5E;--warn:#EC9C94;--warn-bg:#2C1830;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-lift:0 2px 4px rgba(0,0,0,.4),0 18px 40px -16px rgba(0,0,0,.75);color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#071433;--surface:#0D2054;--sunk:#132C5C;--ink:#F0F3F9;--soft:#B7BFC9;--mute:#8592A0;
  --rule:#1D3670;--rule2:#17305F;--go:#7FC6CD;--go-bg:#0F2757;--go-rule:#2E4C85;
  --acc:#D9A63C;--acc-bg:#1A2B5E;--warn:#EC9C94;--warn-bg:#2C1830;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-lift:0 2px 4px rgba(0,0,0,.4),0 18px 40px -16px rgba(0,0,0,.75);color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 "IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:var(--go)}
h1,h2,h3{font-family:"IBM Plex Sans Condensed","Helvetica Neue",Arial,sans-serif;margin:0}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px 80px}
@media(max-width:600px){.wrap{padding:0 16px 60px}}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

.page-head{padding:40px 0 26px;display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.eyebrow{font:600 12px/1 "IBM Plex Sans Condensed",Arial,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);margin:0 0 10px}
.page-head h1{font-size:clamp(30px,4.4vw,42px);font-weight:700;line-height:1.05;letter-spacing:-.02em}
.lede{color:var(--soft);margin:10px 0 0;max-width:62ch}

.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:34px 0 14px;
  border-bottom:2px solid var(--ink);padding-bottom:8px}
.section-title h2{font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}
.section-title span{font-size:13px;color:var(--mute)}

/* Demo cards */
.demo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,420px),1fr));gap:22px}
.demo-card{background:var(--surface);border:1px solid var(--rule);border-radius:10px;box-shadow:var(--shadow);
  overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .15s,transform .15s}
.demo-card:hover{box-shadow:var(--shadow-lift);transform:translateY(-2px)}
.demo-card__cover{position:relative;display:block;aspect-ratio:16/9;background:#0B1D45;overflow:hidden}
.demo-card__cover img{width:100%;height:100%;object-fit:cover;object-position:top;display:block;transition:transform .3s}
.demo-card:hover .demo-card__cover img{transform:scale(1.025)}
.demo-card__play{position:absolute;inset:auto 14px 14px auto;width:46px;height:46px;border-radius:50%;
  background:var(--amber);color:var(--amber-ink);display:grid;place-items:center;
  box-shadow:0 6px 18px -6px rgba(0,0,0,.6);opacity:0;transform:translateY(6px);transition:.18s}
.demo-card:hover .demo-card__play,.demo-card__cover:focus-visible .demo-card__play{opacity:1;transform:none}
.demo-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.demo-card__title{font:700 21px/1.15 "IBM Plex Sans Condensed",Arial,sans-serif;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.demo-card__sub{color:var(--soft);font-size:14.5px;margin:0}
.demo-card__meta{font:500 12px/1 "IBM Plex Mono",monospace;color:var(--mute);margin-top:auto;padding-top:8px;display:flex;gap:12px;flex-wrap:wrap}
.demo-card__actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.badge{display:inline-block;font:600 11px/1 "IBM Plex Mono",monospace;background:var(--acc-bg);color:var(--acc);
  border-radius:4px;padding:4px 7px;vertical-align:3px;margin-left:6px;letter-spacing:.02em}
.badge--warn{background:var(--warn-bg);color:var(--warn)}

.btn{display:inline-flex;align-items:center;gap:8px;font:600 14px/1 "IBM Plex Sans",Arial,sans-serif;text-decoration:none;
  padding:11px 16px;border-radius:7px;border:1px solid transparent;cursor:pointer;transition:.12s;white-space:nowrap}
.btn svg{width:16px;height:16px;flex-shrink:0}
.btn--primary{background:#0B1D45;color:#fff;border-color:#0B1D45}
.btn--primary:hover{background:#1C3B78;border-color:#1C3B78}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn--primary{background:var(--amber);color:var(--amber-ink);border-color:var(--amber)}
  :root:not([data-theme="light"]) .btn--primary:hover{background:#FFC53D}}
:root[data-theme="dark"] .btn--primary{background:var(--amber);color:var(--amber-ink);border-color:var(--amber)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn--ghost:hover{border-color:var(--go);color:var(--go)}

/* Tool cards */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,340px),1fr));gap:16px}
.tool-card{display:flex;gap:16px;align-items:flex-start;background:var(--surface);border:1px solid var(--rule);border-radius:10px;
  box-shadow:var(--shadow);padding:20px;text-decoration:none;color:inherit;transition:.15s}
.tool-card:hover{border-color:var(--go);box-shadow:var(--shadow-lift)}
.tool-card__icon{width:44px;height:44px;border-radius:10px;display:grid;place-items:center;flex-shrink:0;background:var(--go-bg);color:var(--go)}
.tool-card__icon--staff{background:var(--acc-bg);color:var(--acc)}
.tool-card__icon svg{width:22px;height:22px}
.tool-card h3{font-size:18px;font-weight:700;color:var(--ink)}
.tool-card p{margin:4px 0 0;font-size:14px;color:var(--soft)}

.tips{margin-top:34px;display:flex;gap:10px 22px;flex-wrap:wrap;font-size:13.5px;color:var(--mute)}
kbd{font:600 11.5px/1 "IBM Plex Mono",monospace;color:var(--ink);background:var(--sunk);border:1px solid var(--rule);
  border-bottom-width:2px;border-radius:4px;padding:2px 6px;margin-right:4px}

.empty{background:var(--surface);border:1px dashed var(--rule);border-radius:10px;padding:34px;text-align:center;color:var(--soft)}

/* Auth pages */
.auth{min-height:calc(100vh - 58px);display:grid;place-items:center;padding:40px 16px}
.auth-card{width:min(400px,100%);background:var(--surface);border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow-lift);padding:30px 28px}
.auth-card h1{font-size:28px;font-weight:700;letter-spacing:-.01em;margin-bottom:4px}
.auth-card p.lede{margin:0 0 20px;font-size:14.5px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font:600 13px/1 "IBM Plex Sans Condensed",Arial,sans-serif;letter-spacing:.04em;color:var(--soft)}
.field input{font:16px "IBM Plex Sans",Arial,sans-serif;color:var(--ink);background:var(--sunk);border:1px solid var(--rule);border-radius:7px;padding:11px 12px}
.field input:focus{outline:2px solid var(--go);outline-offset:0;border-color:transparent}
.form-error{background:var(--warn-bg);color:var(--warn);border-radius:7px;padding:10px 12px;font-size:14px;margin-bottom:14px}
.auth-card .btn{width:100%;justify-content:center;padding:13px 16px}
.messages{list-style:none;padding:0;margin:18px 0 0}
.messages li{background:var(--go-bg);border:1px solid var(--go-rule);border-radius:7px;padding:10px 14px;font-size:14px}