/* AI Heuristic website — colors and type from Brand/tokens/aiheuristic-tokens.css (v1.0) */
@font-face{font-family:"Inter";src:url("fonts/Inter-Regular.ttf") format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:"Inter";src:url("fonts/Inter-SemiBold.ttf") format("truetype");font-weight:600;font-display:swap}
@font-face{font-family:"Inter";src:url("fonts/Inter-Bold.ttf") format("truetype");font-weight:700;font-display:swap}

:root{
  --aih-ink:#1B2A41;
  --aih-teal:#0F9D8A;
  --aih-mint:#7FD6C9;
  --aih-soft:#EEF6F5;
  --aih-white:#FFFFFF;
  --aih-deep-teal:#0B7A6C;
  --aih-raised-navy:#263854;
  --aih-mist:#CFE9E5;
  --aih-cloud:#D6DEE6;
  --aih-muted:#5B6573;
  --aih-font:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --aih-font-prompt:"Courier New",Courier,monospace;
  --wrap:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--aih-white);color:var(--aih-ink);font-family:var(--aih-font);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--aih-deep-teal)}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

.skip-link{position:absolute;left:-999px;top:8px;background:var(--aih-white);color:var(--aih-ink);padding:8px 12px;z-index:10}
.skip-link:focus{left:8px}
:focus-visible{outline:3px solid var(--aih-mint);outline-offset:3px}

.label{font-size:14px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;margin:0 0 16px}

/* Buttons */
.btn{display:inline-block;font-weight:600;font-size:17px;text-decoration:none;padding:15px 26px;border-radius:8px;transition:transform .15s ease,background .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--aih-deep-teal);color:var(--aih-white)}
.btn-primary:hover{background:#096b5f}
.btn-on-dark{background:var(--aih-white);color:var(--aih-ink)}
.btn-on-dark:hover{background:var(--aih-soft)}

/* Header + hero (navy) */
.hero{background:var(--aih-ink);color:var(--aih-white);border-bottom:10px solid var(--aih-teal)}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:22px;padding-bottom:22px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--aih-white)}
.brand img{width:64px;height:auto}
.brand span{font-size:14px;font-weight:600;letter-spacing:.14em;color:var(--aih-mint)}
.site-header nav{display:flex;gap:24px;align-items:center}
.site-header nav a{color:var(--aih-cloud);text-decoration:none;font-weight:600;font-size:16px}
.site-header nav a:hover{color:var(--aih-white)}

.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;padding-top:56px;padding-bottom:96px}
.hero .label{color:var(--aih-mint)}
.hero h1{font-size:clamp(40px,5.6vw,64px);color:var(--aih-white)}
.hero .lede{font-size:21px;color:var(--aih-mist);max-width:34ch;margin-bottom:32px}
.hero-note{font-size:15px;color:var(--aih-cloud);margin-top:16px}

/* Prompt card (echoes the video prompt card) */
.prompt-stack{position:relative}
.prompt-stack::before{content:"";position:absolute;inset:18px -18px -18px 18px;background:var(--aih-raised-navy);border-radius:14px}
.prompt-card{position:relative;background:var(--aih-soft);color:var(--aih-ink);border-radius:14px;padding:28px}
.prompt-card .card-top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px}
.prompt-card h2{font-size:20px;margin:0}
.saves{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--aih-deep-teal);white-space:nowrap}
.prompt-text{font-family:var(--aih-font-prompt);font-size:16px;line-height:1.55;border-left:4px solid var(--aih-teal);padding:4px 0 4px 16px;margin:0 0 18px}
.fill{background:rgba(15,157,138,.16);border-radius:3px;padding:0 2px}
.copy-btn{font:600 15px var(--aih-font);background:var(--aih-ink);color:var(--aih-white);border:0;border-radius:8px;padding:10px 16px;cursor:pointer}
.copy-btn:hover{background:var(--aih-raised-navy)}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.works{font-size:14px;color:var(--aih-muted)}

/* Sections */
section.band{padding:96px 0}
section.soft{background:var(--aih-soft)}
.section-head{max-width:640px;margin-bottom:48px}
.section-head .label{color:var(--aih-deep-teal)}
.section-head h2{font-size:clamp(30px,3.6vw,42px)}
.section-head p{color:var(--aih-muted);font-size:19px}

.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.steps li{background:var(--aih-white);border-radius:12px;padding:28px;border-top:4px solid var(--aih-teal);counter-increment:step}
.steps li::before{content:"0" counter(step);display:block;font-weight:700;color:var(--aih-deep-teal);font-size:15px;letter-spacing:.1em;margin-bottom:10px}
.steps h3{font-size:21px}
.steps p{color:var(--aih-muted);margin:0;font-size:17px}

.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.task-list{list-style:none;margin:0;padding:0;columns:2;column-gap:32px}
.task-list li{break-inside:avoid;padding:12px 0 12px 36px;border-bottom:1px solid #DCE6E4;position:relative;font-size:17px}
.task-list li::before{content:"[ ]";position:absolute;left:0;top:12px;font-family:var(--aih-font-prompt);font-weight:700;color:var(--aih-teal);font-size:15px}
.rules{background:var(--aih-soft);border-radius:12px;padding:28px}
.rules h3{font-size:19px}
.rules ol{margin:0;padding-left:20px}
.rules li{margin-bottom:10px}
.rules li:last-child{margin-bottom:0}
.guide-cta{margin-top:40px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.guide-cta p{margin:0;color:var(--aih-muted);font-size:16px}

.kit{background:var(--aih-ink);color:var(--aih-white)}
.kit .section-head .label{color:var(--aih-mint)}
.kit .section-head p{color:var(--aih-mist)}
.kit-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.kit ul{margin:0;padding:0;list-style:none}
.kit li{padding:14px 0 14px 22px;border-bottom:1px solid var(--aih-raised-navy);position:relative;color:var(--aih-cloud)}
.kit li::before{content:"";position:absolute;left:0;top:25px;width:10px;height:3px;background:var(--aih-teal)}
.kit-box{background:var(--aih-raised-navy);border-radius:14px;padding:32px}
.kit-box .date{font-size:28px;font-weight:700;margin-bottom:6px}
.kit-box p{color:var(--aih-cloud);font-size:17px}

.about-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}
.about-grid blockquote{margin:0;font-size:clamp(26px,3vw,34px);font-weight:700;line-height:1.25;border-left:6px solid var(--aih-teal);padding-left:24px}
.about-grid p{font-size:19px}

.follow{text-align:center}
.follow h2{font-size:clamp(28px,3.4vw,40px)}
.follow p{color:var(--aih-muted)}
.social-row{display:flex;justify-content:center;gap:14px;margin-top:24px;flex-wrap:wrap}
.social-row a{display:flex;align-items:center;gap:10px;padding:12px 18px;border:1.5px solid #CFDCDA;border-radius:999px;text-decoration:none;color:var(--aih-ink);font-weight:600;font-size:16px}
.social-row a:hover{border-color:var(--aih-teal);background:var(--aih-soft)}
.social-row img{width:18px;height:18px}

/* Footer */
footer{background:var(--aih-ink);color:var(--aih-cloud);padding:48px 0 40px;border-top:10px solid var(--aih-teal);font-size:15px}
.footer-grid{display:flex;justify-content:space-between;align-items:flex-start;gap:32px;flex-wrap:wrap}
footer img.footer-logo{width:72px;margin-bottom:14px}
footer p{margin:0 0 6px;max-width:52ch}
footer a{color:var(--aih-mint)}
.footer-links{display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.footer-social{display:flex;gap:12px}
.footer-social a{display:flex;width:40px;height:40px;border-radius:50%;background:var(--aih-raised-navy);align-items:center;justify-content:center}
.footer-social img{width:18px;height:18px;filter:invert(1)}

/* Privacy page */
.policy{max-width:720px;padding:72px 24px 96px;margin:0 auto}
.policy h2{font-size:22px;margin-top:40px}
.policy p{color:#2f3b4d}
.policy .updated{color:var(--aih-muted)}
.hero.slim .hero-grid{grid-template-columns:1fr;padding-top:32px;padding-bottom:64px}

@media (max-width:860px){
  body{font-size:17px}
  .hero-grid,.guide-grid,.kit-grid,.about-grid{grid-template-columns:1fr;gap:40px}
  .hero-grid{padding-top:24px;padding-bottom:72px}
  .prompt-stack{margin-right:18px}
  .steps{grid-template-columns:1fr}
  section.band{padding:72px 0}
  .footer-links{align-items:flex-start}
}
@media (max-width:560px){
  .wrap{padding:0 16px}
  .site-header nav a:not(.nav-cta){display:none}
  .brand span{display:none}
  .task-list{columns:1}
  .prompt-card{padding:22px}
  .prompt-card .card-top{flex-direction:column;gap:6px}
  .prompt-text{font-size:15px}
  .btn{width:100%;text-align:center}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}