/* OSMM — Open Semantic Marketing Model
   Brand: Mint & Navy, IBM Plex. Static site for GitHub Pages. */

:root{
  --navy:#0f1b35;
  --mint-deep:#34c6a4;
  --mint-light:#d4f2ec;
  --mint-mid:#79d4c0;
  --desc-gray:#5b6472;
  --desc-light:#9fb0c9;
  --tint:#f3faf8;
  --line:#e4eae8;
  --white:#ffffff;
  --maxw:1080px;
  --radius:14px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--navy);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
img,svg{display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:500}
.brand img{width:30px;height:30px}
.brand .wordmark{font-family:"IBM Plex Mono",monospace;font-weight:500;font-size:20px;letter-spacing:.01em;color:var(--navy)}
.brand .brand-lockup{width:auto;height:40px}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav-links a{font-size:14.5px;text-decoration:none;color:var(--desc-gray);transition:color .15s}
.nav-links a:hover{color:var(--navy)}
.nav-cta{padding:8px 16px;border-radius:999px;background:var(--navy);color:#fff !important;font-size:14px}
.nav-cta:hover{background:#1b2c4f}

/* mobile nav toggle (CSS-only hamburger) */
.nav-toggle-cb{position:absolute;opacity:0;pointer-events:none;width:0;height:0}
.nav-toggle{display:none;margin-left:auto;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;cursor:pointer;color:var(--navy);
  -webkit-tap-highlight-color:transparent}
.nav-toggle:hover{background:var(--tint)}
.nav-toggle .bars,.nav-toggle .bars::before,.nav-toggle .bars::after{
  content:"";display:block;width:22px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .2s ease,opacity .2s ease}
.nav-toggle .bars{position:relative}
.nav-toggle .bars::before{position:absolute;top:-7px}
.nav-toggle .bars::after{position:absolute;top:7px}
.nav-toggle-cb:checked ~ .nav-toggle .bars{background:transparent}
.nav-toggle-cb:checked ~ .nav-toggle .bars::before{transform:translateY(7px) rotate(45deg)}
.nav-toggle-cb:checked ~ .nav-toggle .bars::after{transform:translateY(-7px) rotate(-45deg)}

/* nav dropdown */
.nav-item.has-dropdown{position:relative;align-self:stretch;display:flex;align-items:center}
.dd-cb{position:absolute;opacity:0;width:0;height:0;pointer-events:none}
.dd-toggle{font-size:14.5px;color:var(--desc-gray);cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:color .15s;user-select:none;white-space:nowrap}
.dd-toggle:hover{color:var(--navy)}
.dd-caret{font-size:10px;line-height:1;transition:transform .18s}
.nav-item.has-dropdown:hover .dd-caret,
.dd-cb:checked ~ .dd-toggle .dd-caret{transform:rotate(180deg)}
.dropdown{
  position:absolute;top:100%;left:0;margin-top:6px;z-index:60;
  display:none;flex-direction:column;gap:2px;min-width:212px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:8px;box-shadow:0 14px 30px rgba(15,27,53,.12);
}
.nav-item.has-dropdown::after{content:"";position:absolute;top:100%;left:0;right:0;height:8px}
.nav-item.has-dropdown:hover .dropdown,
.nav-item.has-dropdown:focus-within .dropdown,
.dd-cb:checked ~ .dropdown{display:flex}
.dropdown a{padding:9px 12px;border-radius:8px;font-size:14px;color:var(--desc-gray);text-decoration:none;white-space:nowrap;transition:background .12s,color .12s}
.dropdown a:hover{background:var(--tint);color:var(--navy)}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:12px 22px;border-radius:999px;text-decoration:none;font-size:15px;font-weight:500;transition:all .15s;border:1.5px solid transparent;cursor:pointer}
.btn-primary{background:var(--mint-deep);color:var(--navy)}
.btn-primary:hover{background:#2bb393}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:#1b2c4f}
.btn-outline{border-color:var(--line);color:var(--navy);background:#fff}
.btn-outline:hover{border-color:var(--mint-deep)}

/* ---------- hero ---------- */
.hero{background:var(--navy);color:#fff;padding:84px 0 76px;position:relative;overflow:hidden}
.hero .eyebrow{font-family:"IBM Plex Mono",monospace;color:var(--mint-mid);font-size:14px;letter-spacing:.08em;text-transform:uppercase;margin:0 0 18px}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.08;font-weight:500;margin:0 0 20px;letter-spacing:-.01em;max-width:16ch}
.hero p.lead{font-size:clamp(17px,2.2vw,20px);color:var(--desc-light);max-width:62ch;margin:0 0 32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:46px}
.badge{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--mint-light);border:1px solid rgba(121,212,192,.35);border-radius:999px;padding:6px 14px}

/* ---------- sections ---------- */
section{padding:72px 0}
.section-tint{background:var(--tint)}
.section-navy{background:var(--navy);color:#fff}
.kicker{font-family:"IBM Plex Mono",monospace;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--mint-deep);margin:0 0 12px}
h2{font-size:clamp(26px,3.4vw,36px);font-weight:500;line-height:1.15;margin:0 0 18px;letter-spacing:-.01em}
.section-navy .kicker{color:var(--mint-mid)}
.lead-text{font-size:18.5px;color:var(--desc-gray);max-width:70ch}
.section-navy .lead-text{color:var(--desc-light)}

/* ---------- definition ---------- */
.define p{font-size:clamp(20px,2.6vw,26px);line-height:1.5;max-width:30ch;font-weight:400}
.define .grid{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:start}
.define .body{font-size:18px;color:var(--desc-gray)}
.define .body strong{color:var(--navy);font-weight:500}

/* ---------- challenge / solution ---------- */
.cs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:36px}
.cs-card{border-radius:var(--radius);padding:28px;border:1px solid var(--line);background:#fff}
.cs-card.problem{background:#fff}
.cs-card.solution{background:var(--navy);color:#fff;border-color:var(--navy)}
.cs-card h3{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:500;margin:0 0 18px}
.cs-card ul{list-style:none;margin:0;padding:0}
.cs-card li{display:flex;gap:12px;padding:9px 0;font-size:15.5px;border-top:1px solid var(--line)}
.cs-card.solution li{border-top-color:rgba(255,255,255,.12);color:var(--desc-light)}
.cs-card li:first-child{border-top:none}
.ico{flex:0 0 auto;width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;margin-top:1px}
.ico-x{background:#fbe7e1;color:#b0432a}
.ico-c{background:var(--mint-deep);color:var(--navy)}

/* ---------- how it works ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px;margin-top:14px}
.cat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;border-top:3px solid var(--mint-deep)}
.cat .n{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--mint-deep)}
.cat h3{font-size:17px;font-weight:500;margin:6px 0 8px}
.cat p{font-size:14.5px;color:var(--desc-gray);margin:0}
.lineage{margin-top:36px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.lineage .label{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--desc-gray);text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px}
.chain{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.node{font-family:"IBM Plex Mono",monospace;font-size:13.5px;background:var(--mint-light);color:var(--navy);padding:7px 12px;border-radius:8px}
.arrow{color:var(--mint-deep);font-size:15px}
.loop{margin-top:14px;font-size:13.5px;color:var(--desc-gray)}
.loop .mono{color:var(--mint-deep)}

/* ---------- code ---------- */
pre{background:var(--navy);color:#e8eef6;border-radius:var(--radius);padding:22px;overflow:auto;font-family:"IBM Plex Mono",monospace;font-size:13.5px;line-height:1.6;margin:24px 0 0}
pre .k{color:var(--mint-mid)}
pre .s{color:#9fd9c8}
code.inline{font-family:"IBM Plex Mono",monospace;background:var(--mint-light);color:var(--navy);padding:2px 7px;border-radius:6px;font-size:.9em}

/* ---------- audience callouts ---------- */
.aud-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:8px}
.aud{display:block;text-decoration:none;border:1px solid var(--line);border-radius:var(--radius);padding:32px;background:#fff;transition:all .18s}
.aud:hover{border-color:var(--mint-deep);transform:translateY(-2px)}
.aud .pill{display:inline-flex;align-items:center;gap:8px;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--mint-deep);text-transform:uppercase;letter-spacing:.06em}
.aud h3{font-size:22px;font-weight:500;margin:14px 0 10px}
.aud p{color:var(--desc-gray);font-size:15.5px;margin:0 0 18px}
.aud .go{font-weight:500;color:var(--navy)}
.aud:hover .go{color:var(--mint-deep)}

/* ---------- get involved ---------- */
.involve-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:30px}
.inv{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:24px;text-decoration:none;color:#fff;transition:all .15s}
.inv:hover{background:rgba(255,255,255,.1);border-color:var(--mint-mid)}
.inv h3{font-size:17px;font-weight:500;margin:10px 0 6px}
.inv p{font-size:14px;color:var(--desc-light);margin:0}
.inv .ti{color:var(--mint-mid);font-size:22px}

/* ---------- contact ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
form.contact{display:grid;gap:14px}
.field{display:grid;gap:6px}
.field label{font-size:13.5px;color:var(--desc-gray);font-weight:500}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:15px;padding:12px 14px;border:1px solid var(--line);
  border-radius:10px;background:#fff;color:var(--navy);width:100%}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--mint-deep);box-shadow:0 0 0 3px rgba(52,198,164,.18)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:var(--desc-light);padding:48px 0 36px;border-top:1px solid rgba(255,255,255,.08)}
.foot{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.foot .brand .wordmark{color:#fff}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}
.foot-links a{color:var(--desc-light);text-decoration:none;font-size:14px}
.foot-links a:hover{color:#fff}
.foot-legal{margin-top:24px;font-size:13px;color:var(--desc-gray)}

/* ---------- subpage ---------- */
.page-hero{background:var(--navy);color:#fff;padding:64px 0 56px}
.page-hero .eyebrow{font-family:"IBM Plex Mono",monospace;color:var(--mint-mid);font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin:0 0 14px}
.page-hero h1{font-size:clamp(30px,4.4vw,46px);font-weight:500;margin:0 0 16px;max-width:20ch;line-height:1.1}
.page-hero p{color:var(--desc-light);font-size:19px;max-width:64ch;margin:0}
.prose{max-width:74ch}
.prose h2{margin-top:8px}
.prose p{font-size:17px;color:#33404f}
.prose .kicker{margin-top:0}
.value-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.value{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;border-left:3px solid var(--mint-deep)}
.value .num{font-family:"IBM Plex Mono",monospace;color:var(--mint-deep);font-size:13px}
.value h3{font-size:18px;font-weight:500;margin:8px 0 8px}
.value p{font-size:15px;color:var(--desc-gray);margin:0}
.divider{height:1px;background:var(--line);margin:0}

/* ---------- decisions -> objects ---------- */
.xform-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:34px}
.xform{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;display:flex;flex-direction:column}
.xform-head{padding:22px 24px 18px;border-bottom:1px solid var(--line)}
.xform-head .dec{font-size:19px;font-weight:500;margin:0 0 12px;color:var(--navy)}
.xform-today{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--desc-gray)}
.xform-today .tag{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:#b0432a;background:#fbe7e1;border-radius:999px;padding:3px 10px;flex:0 0 auto}
.xform-arrow{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--mint-deep);text-transform:uppercase;letter-spacing:.06em;padding:12px 24px 0}
.xform pre{margin:8px 24px 24px;padding:18px;font-size:12.5px;line-height:1.55;border-radius:10px}
.xform-note{margin-top:26px;font-size:15px;color:var(--desc-gray);max-width:72ch}
.xform-note .mono{color:var(--mint-deep)}

/* ---------- plugins ---------- */
.plugin-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start;margin-top:12px}
.plugin-steps{list-style:none;margin:22px 0 0;padding:0;counter-reset:pstep}
.plugin-steps li{position:relative;padding:0 0 18px 44px;counter-increment:pstep;font-size:15.5px;color:var(--desc-light)}
.plugin-steps li::before{content:counter(pstep);position:absolute;left:0;top:-2px;width:30px;height:30px;border-radius:50%;background:var(--mint-deep);color:var(--navy);font-family:"IBM Plex Mono",monospace;font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center}
.plugin-steps li strong{color:#fff;font-weight:500}
.plugin-steps .mono{font-family:"IBM Plex Mono",monospace;color:var(--mint-light)}
.plugin-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:24px}
.plugin-card h3{font-size:16px;font-weight:500;margin:0 0 14px;color:#fff}
.plugin-cats{display:grid;gap:10px}
.plugin-cat{display:flex;align-items:baseline;gap:10px;font-size:14px;color:var(--desc-light);padding:9px 0;border-top:1px solid rgba(255,255,255,.10)}
.plugin-cat:first-child{border-top:none}
.plugin-cat .c{font-family:"IBM Plex Mono",monospace;color:var(--mint-mid);font-size:12.5px;flex:0 0 96px}
.plugin-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .nav-toggle{display:flex}
  .nav-links{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:8px 0;
    box-shadow:0 14px 30px rgba(15,27,53,.10);
  }
  .nav-toggle-cb:checked ~ .nav-links{display:flex}
  .nav-links a{padding:13px 24px;font-size:16px;border-top:1px solid var(--line)}
  .nav-links a:first-child{border-top:none}
  .nav-links .nav-cta{margin:10px 24px 6px;text-align:center;border-top:none}
  .nav-item.has-dropdown{flex-direction:column;align-items:stretch;align-self:auto;width:100%}
  .nav-item.has-dropdown::after{display:none}
  .dd-caret{display:none}
  .dd-toggle{padding:13px 24px;font-size:16px;border-top:1px solid var(--line);color:var(--navy)}
  .dropdown{position:static;display:flex !important;margin:0;min-width:0;border:none;border-radius:0;box-shadow:none;padding:0;background:var(--tint)}
  .dropdown a{padding:12px 24px 12px 40px;border-top:1px solid var(--line);font-size:15px}
  .define .grid,.cs-grid,.aud-grid,.contact-wrap,.plugin-wrap{grid-template-columns:1fr}
  section{padding:54px 0}
  .row2{grid-template-columns:1fr}
  .xform-grid{grid-template-columns:1fr}
}