/* ============================================================
   Steadwing for Coding Agents — design tokens from the
   Steadwing brand system (Dipa, 2026): Valentine #F1284C,
   Chosen Blue #082032, Vivid Tangelo #F06927, SF Pro Display.
   Zero dependencies: motion is CSS transitions + one IO script.
   ============================================================ */

:root{
  --ink:#082032;
  --ink-black:#0B0F14;
  --body:#46566A;
  --muted:#64717E;          /* 5.0:1 on white — AA at small sizes */
  --red:#F1284C;
  --red-deep:#D91B3E;       /* link text — 5.0:1 on white */
  --red-press:#B8152F;
  --red-glow:#FF8A9B;       /* single light-red accent on dark */
  --tangelo:#F06927;
  --green:#0E9F5D;
  --paper:#FFFFFF;
  --panel:#F7F8F9;
  --line:#E7EAEE;
  --code-dark:#0A1E2E;
  --surface-dark:linear-gradient(180deg,#0C2334,#081A28);
  --dark-body:#B9C8D3;
  --dark-muted:#9FB3C1;
  --radius:18px;
  --radius-sm:13px;
  --ease-out:cubic-bezier(.165,.84,.44,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --font-mono:"SF Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--paper);color:var(--ink);font-size:16px;line-height:1.6;overflow-x:clip}
.hero-copy,.hero-demo,.qa{min-width:0}
::selection{background:rgba(241,40,76,.16)}
.terminal ::selection,.dark-panel ::selection,.final ::selection,.install ::selection{background:rgba(241,40,76,.55);color:#fff}
img,svg{display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
section[id]{scroll-margin-top:16px}

.container{max-width:1240px;margin:0 auto;padding:0 44px}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:100}
.skip-link:focus{left:0}

/* ---------------- nav ---------------- */
.nav{padding:22px 0;background:var(--paper)}
.nav-inner{display:flex;align-items:center;gap:40px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:38px;height:26px}
.brand-mark.small{width:27px;height:19px}
.brand-name{font-size:24px;font-weight:700;letter-spacing:-0.02em;color:var(--ink-black)}
.brand-sub{font-size:13.5px;font-weight:500;letter-spacing:.005em;color:var(--muted);
  border-left:1px solid #D5DBE1;padding-left:14px;margin-left:8px;line-height:1.3;
  white-space:nowrap;transform:translateY(1px)}
.nav-links{display:flex;gap:30px;font-size:16px;color:#5A6B78}
.nav-links a{transition:color .15s ease}
.nav-links a:hover{color:var(--ink)}
.nav-cta{margin-left:auto;display:flex;gap:12px}

.btn{display:inline-flex;align-items:center;gap:9px;border-radius:var(--radius-sm);font-size:16px;font-weight:600;padding:12px 22px;border:none;cursor:pointer;font-family:inherit;transition:color .15s ease,background-color .15s ease,border-color .15s ease}
.btn-ghost{background:#fff;border:1px solid var(--line);box-shadow:0 1px 2px rgba(8,32,50,.06);color:var(--ink)}
.btn-ghost:hover{border-color:#D5DBE1}
.btn-ghost:active{background:var(--panel)}
.btn-ghost svg{width:18px;height:18px;fill:currentColor}
.btn-sm{padding:8px 14px;font-size:14px;border-radius:10px;gap:8px}
.btn-sm svg{width:16px;height:16px}

/* ---------------- shared type ---------------- */
h1{font-size:clamp(40px,4.4vw,60px);line-height:1.06;font-weight:640;letter-spacing:-0.028em;text-wrap:balance}
h2{font-size:clamp(30px,3.2vw,44px);line-height:1.14;font-weight:640;letter-spacing:-0.024em;text-wrap:balance}

/* ---------------- hero ---------------- */
.hero{padding:64px 0 0;overflow-x:clip}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.hero-copy h1{margin:0 0 22px;max-width:560px}
.hero-sub{font-size:19.5px;line-height:1.6;color:var(--body);max-width:500px;text-wrap:pretty}
.install-row{display:flex;gap:12px;margin-top:34px}
.install{display:inline-flex;align-items:center;gap:16px;background:var(--code-dark);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-sm);padding:14px 18px;box-shadow:0 8px 24px rgba(8,32,50,.16)}
.install code{font-family:var(--font-mono);font-size:15px;color:#EDF2F6;white-space:nowrap}
.install .prompt{color:#FF7D96}
.copy-btn{background:rgba(255,255,255,.12);border:none;border-radius:8px;padding:6px 12px;font-size:12.5px;color:#fff;font-weight:600;cursor:pointer;font-family:var(--font-sans);transition:background-color .15s ease}
.copy-btn:hover{background:rgba(255,255,255,.22)}
.copy-btn:active{background:rgba(255,255,255,.3)}
.copy-btn.copied{background:var(--green)}
.hero-fine{margin-top:18px;font-size:14.5px;color:var(--muted)}

/* terminal — the signature element */
.hero-demo{position:relative}
.hero-demo::before{content:"";position:absolute;inset:-9% -7% -12% -7%;background:
  radial-gradient(58% 52% at 72% 22%,rgba(241,40,76,.13),transparent 48%),
  radial-gradient(48% 48% at 24% 78%,rgba(240,105,39,.11),transparent 45%);
  pointer-events:none}
.terminal{position:relative;background:var(--surface-dark);border-radius:var(--radius);border:1px solid rgba(255,255,255,.08);
  box-shadow:0 30px 70px rgba(8,32,50,.32),inset 0 1px 0 rgba(255,255,255,.06);overflow:hidden}
.terminal-bar{display:flex;align-items:center;gap:10px;padding:14px 18px;background:rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.07)}
.traffic{display:flex;gap:8px}
.traffic i{width:12px;height:12px;border-radius:50%}
.traffic i:nth-child(1){background:#FF5F57}
.traffic i:nth-child(2){background:#FEBC2E}
.traffic i:nth-child(3){background:#28C840}
.terminal-title{margin-left:8px;font-family:var(--font-mono);font-size:12px;color:#8AA0B2}
.replay-btn{margin-left:auto;background:rgba(255,255,255,.1);border:none;border-radius:8px;color:var(--dark-body);font-family:var(--font-mono);font-size:11.5px;padding:5px 10px;cursor:pointer;transition:color .15s ease,background-color .15s ease}
.replay-btn:hover{background:rgba(255,255,255,.18);color:#fff}
.terminal-body{padding:22px 24px 26px;font-family:var(--font-mono);font-size:13.3px;line-height:1.88;color:#C8D6E0;min-height:338px}
.terminal-body>div{padding-left:20px;text-indent:-20px}
html.anim #terminal-body:not(.terminal-live)>div{visibility:hidden;animation:failopen 0s linear 8s forwards}
.terminal-body .t-claude{color:#EDF2F6;font-weight:700}
.terminal-body .t-bg{color:#7E93A3;font-style:italic}
html.anim .terminal-live .t-note{animation:hookpulse .9s var(--ease-out) 1}
@keyframes hookpulse{0%{box-shadow:0 0 0 0 rgba(241,40,76,.5);background:rgba(241,40,76,.34)}
  100%{box-shadow:0 0 0 16px rgba(241,40,76,0);background:rgba(241,40,76,.14)}}
.terminal-body .t-cmd{color:#F1F5F8}
.terminal-body .t-dim{color:#7E93A3}
.terminal-body .t-err{color:var(--red-glow)}
.terminal-body .t-wing{color:var(--tangelo);font-weight:700}
.terminal-body .t-ask{color:#F5C97B}
.terminal-body .t-ok{color:#4ADE9C}
.terminal-body .t-answer{color:#F1F5F8;font-weight:700}
.terminal-body .t-link{color:#EDF2F6;text-decoration:underline;text-underline-offset:3px}
.terminal-body .t-note{display:inline-block;margin:9px 0 2px;padding:6px 12px;border-radius:8px;background:rgba(241,40,76,.14);border:1px solid rgba(241,40,76,.35);color:#FFC2CE;font-size:12.5px;text-indent:0}
.terminal-body .t-note b{color:var(--tangelo);font-weight:700}
.terminal-body .caret{display:inline-block;width:7px;height:15px;background:#C8D6E0;vertical-align:-2px;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}

/* trust strip */
.trust-strip{list-style:none;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:56px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-strip li{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:600;color:var(--ink)}
.trust-strip li a{display:flex;align-items:center;gap:10px;transition:color .15s ease}
.trust-strip li a:hover{color:var(--red-deep)}
.trust-strip svg{width:18px;height:18px;fill:none;stroke:var(--ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* ---------------- how — one bare row ---------------- */
.steps-strip{padding:36px 0}
.steps-strip .container{border-bottom:1px solid var(--line);padding-bottom:36px}
.steps-row{display:grid;grid-template-columns:repeat(3,1fr);gap:44px}
.step-line{font-size:15.5px;line-height:1.6;color:var(--body);text-wrap:pretty}
.step-n{font-family:var(--font-mono);font-size:12.5px;font-weight:600;letter-spacing:.1em;color:var(--red-deep);margin-right:12px}

/* ---------------- sections ---------------- */
.section{padding:72px 0 0}
.section.plain{padding:80px 0 0}

/* dark panel — flat; the page's one glow stays behind the hero terminal */
.dark-panel{border-radius:var(--radius);overflow:hidden;display:grid;grid-template-columns:1.05fr .95fr;gap:0;color:#fff;background:var(--surface-dark)}
.dark-copy{padding:56px 30px 56px 56px}
.dark-copy h2{color:#fff;max-width:460px;hanging-punctuation:first}
.dark-copy p{color:var(--dark-body);font-size:16.5px;line-height:1.65;max-width:440px;margin-top:18px;text-wrap:pretty}
.dark-install{margin-top:30px;box-shadow:none;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14)}
.dark-list{list-style:none;padding:52px 56px 52px 30px;display:flex;flex-direction:column;justify-content:center;gap:6px}
.dark-list li{padding:15px 0;border-bottom:1px dashed rgba(255,255,255,.14)}
.dark-list li:last-child{border-bottom:none}
.dark-list b{display:block;font-size:16px;font-weight:640;margin-bottom:4px}
.dark-list span{font-size:14.5px;color:var(--dark-muted);line-height:1.55;text-wrap:pretty}

/* what leaves your machine — bare split, hairlines only */
.privacy{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;padding:56px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.privacy-copy h2{max-width:460px}
.privacy-copy p{font-size:16.5px;line-height:1.65;color:var(--body);margin:18px 0 24px;max-width:440px;text-wrap:pretty}
.text-link{color:var(--red-deep);font-weight:600;font-size:15px;transition:color .15s ease}
.text-link:hover{color:var(--red-press)}
/* the sendspec — consent rendered as the artifact engineers approve: a diff */
.sendspec{align-self:center;font-family:var(--font-mono);font-size:13.5px;line-height:1.6;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;
  box-shadow:0 1px 2px rgba(8,32,50,.04)}
.d-hunk{padding:8px 18px;background:var(--panel);color:var(--muted);font-size:12px;
  letter-spacing:.02em;border-bottom:1px solid var(--line)}
.sendspec .d-hunk:not(:first-child){border-top:1px solid var(--line)}
.d-hunk + .d-line{padding-top:12px}
.d-line{display:flex;gap:13px;padding:6px 18px;color:var(--ink)}
.d-line:last-child,.d-line:has(+ .d-hunk){padding-bottom:12px}
.d-gut{flex:none;width:10px;font-weight:700}
.d-add{background:rgba(14,159,93,.065)}
.d-add .d-gut{color:var(--green)}
.d-del{background:rgba(241,40,76,.05)}
.d-del .d-gut{color:var(--red-deep)}

/* faq — bare list; heading at label scale, terminal-native */
.faq-wrap h2{font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--muted);margin-bottom:16px}
.faq-list{border-top:1px solid var(--line)}
.qa{border-bottom:1px solid var(--line)}
.qa summary{list-style:none;cursor:pointer;padding:20px 4px;font-size:17.5px;font-weight:640;display:flex;gap:18px;align-items:baseline;transition:color .15s ease}
.qa summary:hover{color:var(--red-deep)}
.qa summary::-webkit-details-marker{display:none}
.qa-n{font-family:var(--font-mono);font-size:12.5px;font-weight:600;letter-spacing:.1em;color:var(--red-deep);flex:none}
.qa summary::after{content:"+";margin-left:auto;font-family:var(--font-mono);font-size:16px;font-weight:600;color:var(--muted)}
.qa[open] summary::after{content:"−";color:var(--ink)}
.qa[open] summary{padding-bottom:8px}
.qa p{margin:2px 4px 24px 44px;padding:2px 0 2px 18px;border-left:2px solid rgba(241,40,76,.3);font-size:15px;line-height:1.62;color:var(--body);text-wrap:pretty;max-width:620px}
.a-lead{font-family:var(--font-mono);font-size:.9em;font-weight:700;color:var(--ink)}
.qa p code{font-family:var(--font-mono);font-size:.92em;color:var(--ink)}
.qa p a{color:var(--red-deep);font-weight:600}
.qa p a:hover{color:var(--red-press)}

/* final — full-bleed flat Chosen Blue; the prompt is the close */
.final{margin-top:96px;padding:92px 0 100px;background:var(--ink);color:#fff;text-align:center}
.final h2{color:#fff;font-size:clamp(38px,4.6vw,60px)}
.final-prompt{display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap;margin-top:44px}
.final-prompt code{font-family:var(--font-mono);font-size:clamp(15px,1.5vw,20px);color:#EDF2F6}
.final-prompt .prompt{color:var(--red-glow)}
.final-prompt .caret{display:inline-block;width:10px;height:1.05em;background:#EDF2F6;
  vertical-align:-0.15em;margin-left:10px;animation:blink 1s step-end infinite}
.copy-ghost{background:transparent;border:1px solid rgba(255,255,255,.3);padding:7px 14px;font-size:13px}
.copy-ghost:hover{background:rgba(255,255,255,.1)}
.final-fine{margin-top:28px;font-size:14.5px;color:var(--dark-muted)}
.final-fine a{color:#fff;font-weight:600;transition:color .15s ease}
.final-fine a:hover{color:var(--red-glow)}

/* footer */
.footer{margin-top:0;border-top:1px solid var(--line);padding:36px 0 44px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer .brand-name{font-size:18px}
.footer-mid{font-size:14px;color:var(--muted)}
.footer-mid a{transition:color .15s ease}
.footer-mid a:hover{color:var(--ink)}
.footer-links{display:flex;gap:22px;font-size:14.5px;color:var(--body)}
.footer-links a{transition:color .15s ease}
.footer-links a:hover{color:var(--ink)}

/* ---------------- reveals (CSS motion, IO trigger) ----------------
   failopen: if main.js ever fails to load after the head script set
   .anim, nothing may stay hidden — everything force-shows at 8s. */
@keyframes failopen{to{opacity:1;transform:none;visibility:visible}}
html.anim .reveal{opacity:0;transform:translateY(14px);
  transition:opacity .55s var(--ease-out) var(--stagger,0ms),transform .55s var(--ease-out) var(--stagger,0ms);
  animation:failopen 0s linear 8s forwards}
html.anim .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.anim .reveal{opacity:1;transform:none;transition:none}
  .terminal-body .caret,.final-prompt .caret,.caret{animation:none}
}

/* ---------------- responsive ---------------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-copy h1{max-width:640px}
  .steps-row{grid-template-columns:1fr;gap:16px}
  .dark-panel,.privacy{grid-template-columns:1fr}
  .privacy{gap:32px}
  .dark-list{padding:8px 56px 44px}
  .brand-sub{display:none}
  .nav-inner{gap:26px}
  .nav-links{gap:20px;font-size:15px}
}
@media (max-width:880px){
  .nav-links{display:none}
}
@media (max-width:720px){
  .container{padding:0 22px}
  .nav-inner{gap:14px}
  .brand-mark{width:30px;height:21px}
  .brand-name{font-size:20px}
  .btn{padding:10px 16px;font-size:14.5px;gap:7px}
  .btn-ghost svg{width:16px;height:16px}
  .section{padding:56px 0 0}
  .section.plain{padding:60px 0 0}
  .install{gap:12px;padding:13px 15px}
  .install code{white-space:normal;overflow-wrap:break-word;word-break:normal}
  .terminal-body{font-size:12.5px;padding:18px 16px 22px;min-height:310px}
  .terminal-body .t-link{overflow-wrap:anywhere}
  .steps-strip .container{padding-bottom:28px}
  .dark-copy{padding:40px 28px 8px}
  .dark-list{padding:8px 28px 36px}
  .privacy{padding:40px 0}
  .sendspec{font-size:12.5px}
  .final{margin-top:64px;padding:64px 0 72px}
  .trust-strip{justify-content:flex-start;column-gap:28px}
  .footer-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .dark-install code,.final-prompt code{font-size:13px}
}