/* custompackingcubes.com — single stylesheet. Tokens per DESIGN.md */
:root{
  --bg:#F6FAF9;
  --surface:#FFFFFF;
  --ink:#122B2E;
  --body:#3D5457;
  --teal:#0F766E;
  --teal-dark:#0A5B55;
  --teal-deep:#0B3D3A;
  --teal-tint:#E3F0EE;
  --on-deep:#E8F2F0;
  --border:#D5E4E1;
  --error:#B4232A;
  --radius:10px;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --font-display:"Bricolage Grotesque","Avenir Next","Segoe UI",system-ui,sans-serif;
  --font-body:"IBM Plex Sans","Helvetica Neue",Arial,system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","SF Mono",Menlo,monospace;
  --container:1160px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  font-family:var(--font-body);font-size:1rem;line-height:1.65;
  color:var(--body);background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--teal);outline-offset:2px;
}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);line-height:1.15;letter-spacing:-0.015em;font-weight:700}
h1{font-size:clamp(2.1rem,4.5vw,3.4rem)}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
h3{font-size:1.22rem;line-height:1.3}
p{max-width:68ch}
.mono{font-family:var(--font-mono);font-size:.92em}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tint{background:var(--teal-tint)}
.section-deep{background:var(--teal-deep);color:var(--on-deep)}
.section-deep h2,.section-deep h3{color:#fff}
.section-deep p{color:var(--on-deep)}
.section-head{max-width:720px;margin-bottom:48px}
.section-head p{margin-top:12px}
.lead{font-size:1.12rem}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;height:72px;
  background:rgba(246,250,249,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav-wrap{max-width:var(--container);margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.06rem;color:var(--ink);white-space:nowrap}
.brand svg{flex:none}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:24px}
.site-nav a{color:var(--ink);font-size:.94rem;font-weight:500;white-space:nowrap;transition:color .18s var(--ease)}
.site-nav a[aria-current="page"]{color:var(--teal);font-weight:600}
.nav-cta{background:var(--teal);color:#fff !important;padding:10px 18px;border-radius:var(--radius);font-weight:600}
.nav-toggle{display:none}
@media (hover:hover) and (pointer:fine){
  .site-nav a:hover{color:var(--teal)}
  .nav-cta:hover{background:var(--teal-dark);color:#fff}
  .btn-primary:hover{background:var(--teal-dark)}
  .btn-ghost:hover{background:var(--teal-tint)}
  .card-link:hover{border-color:var(--teal)}
  .card-link:hover h3{color:var(--teal)}
  footer a:hover{color:#fff}
}
@media (max-width:860px){
  .nav-toggle{
    display:flex;align-items:center;justify-content:center;
    width:44px;height:44px;margin-left:auto;background:none;border:1px solid var(--border);
    border-radius:var(--radius);cursor:pointer;color:var(--ink);
  }
  .site-nav{
    display:none;position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--surface);border-bottom:1px solid var(--border);padding:8px 0;margin-left:0;
  }
  .site-nav.open{display:flex}
  .site-nav a{padding:13px 24px}
  .nav-cta{margin:10px 24px;text-align:center}
}

/* ---------- buttons ---------- */
.btn{display:inline-block;font-weight:600;font-size:1rem;border-radius:var(--radius);
  padding:14px 26px;border:0;cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ease),transform .12s var(--ease);text-align:center}
.btn:active{transform:scale(0.98)}
.btn-primary{background:var(--teal);color:#fff}
.btn-ghost{background:transparent;color:var(--teal);border:1.5px solid var(--teal)}
.section-deep .btn-primary{background:#fff;color:var(--teal-deep)}
@media (hover:hover) and (pointer:fine){.section-deep .btn-primary:hover{background:var(--teal-tint)}}

/* ---------- hero ---------- */
.hero{padding:72px 0 88px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{margin-bottom:18px;font-size:clamp(2.1rem,3.6vw,3rem)}
.hero .lead{margin-bottom:28px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-media{position:relative}
.hero-media img{border-radius:var(--radius);background:var(--surface);border:1px solid var(--border)}
.eyebrow{font-family:var(--font-mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.14em;color:var(--teal);display:block;margin-bottom:14px}
@media (max-width:860px){
  .hero{padding:40px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
}

/* ---------- grids & cards ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media (max-width:960px){.grid-4{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;min-width:0}
.card h3{margin-bottom:10px}
.card p{font-size:.96rem}
.card-link{display:block;color:inherit;transition:border-color .18s var(--ease)}
.card-link h3{transition:color .18s var(--ease)}
.card-tint{background:var(--teal-tint);border-color:transparent}
.card .mono{color:var(--teal);display:block;margin-bottom:8px}
.card-img{padding:0;overflow:hidden}
.card-img img{width:100%;border-bottom:1px solid var(--border)}
.card-img .card-body{padding:22px 24px}

/* stats band */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:left}
.stats div{min-width:0}
.stats .num{font-family:var(--font-mono);font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:600;color:#fff;display:block}
.stats .lbl{font-size:.9rem;color:var(--on-deep)}
@media (max-width:760px){.stats{grid-template-columns:1fr 1fr;gap:28px}}

/* split feature rows */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split > div{min-width:0}
.split h2{margin-bottom:14px}
.split p + p{margin-top:12px}
.split ul{margin:16px 0 0 18px}
.split li{margin-bottom:8px}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:30px}}

/* spec / info design blocks */
.spec-figure{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.spec-figure figcaption{font-size:.88rem;color:var(--body);margin-top:14px}
.spec-figure svg{width:100%;height:auto}
.spec-table{width:100%;border-collapse:collapse;font-size:.95rem}
.spec-table th{font-family:var(--font-body);font-weight:600;color:var(--ink);text-align:left;padding:10px 14px;background:var(--teal-tint)}
.spec-table td{padding:10px 14px;border-bottom:1px solid var(--border)}
.spec-table td.mono{white-space:nowrap}
.table-scroll{overflow-x:auto}

/* process steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;counter-increment:step;min-width:0}
.step::before{content:counter(step,decimal-leading-zero);font-family:var(--font-mono);color:var(--teal);font-size:.85rem;display:block;margin-bottom:8px}
.step strong{color:var(--ink);display:block;margin-bottom:4px}
.step span{font-size:.88rem}
@media (max-width:960px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:0;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink);padding:18px 22px;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:22px;top:14px;font-size:1.4rem;color:var(--teal);transition:transform .2s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 22px 18px}

/* colorway swatch strip */
.swatches{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.swatches span{width:34px;height:34px;border-radius:50%;border:2px solid var(--surface);box-shadow:0 0 0 1px var(--border);display:inline-block}

/* ---------- blog ---------- */
.post-list .card{margin-bottom:0}
.post-meta{font-family:var(--font-mono);font-size:.8rem;color:var(--teal);margin-bottom:10px;display:block}
.article{max-width:760px;margin:0 auto}
.article h1{margin-bottom:14px}
.article h2{margin:44px 0 14px}
.article h3{margin:30px 0 10px}
.article p{margin-bottom:16px;max-width:none}
.article ul,.article ol{margin:0 0 16px 22px}
.article li{margin-bottom:8px}
.article .spec-figure{margin:28px 0}
.article .table-scroll{margin:24px 0}
.article blockquote{border-left:3px solid var(--teal);padding:4px 0 4px 20px;color:var(--ink);margin:24px 0}

/* ---------- forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-grid .full{grid-column:1/-1}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
.field label{display:block;font-weight:600;color:var(--ink);font-size:.92rem;margin-bottom:6px}
.field label .req{color:var(--error)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius);
  font-family:var(--font-body);font-size:1rem;color:var(--ink);background:var(--surface);
}
.field textarea{min-height:130px;resize:vertical}
.field .err{display:none;color:var(--error);font-size:.85rem;margin-top:5px}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--error)}
.field.invalid .err{display:block}
.form-note{font-size:.88rem;margin-top:14px}
.hp{display:none !important}

/* ---------- footer ---------- */
.site-footer{background:var(--teal-deep);color:var(--on-deep);padding:64px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.site-footer h4{color:#fff;font-size:.98rem;margin-bottom:14px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:9px}
.site-footer a{color:var(--on-deep);font-size:.92rem;transition:color .18s var(--ease)}
.footer-brand p{font-size:.92rem;max-width:34ch;margin-top:12px}
.footer-bottom{border-top:1px solid rgba(232,242,240,.18);padding-top:22px;font-size:.85rem;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}

/* breadcrumbs */
.crumbs{font-size:.85rem;padding:18px 0 0;color:var(--body)}
.crumbs ol{list-style:none;display:flex;gap:8px;flex-wrap:wrap}
.crumbs li+li::before{content:"/";margin-right:8px;color:var(--border)}

/* ---------- motion ---------- */
html.js .reveal{opacity:0;transform:translateY(18px)}
html.js .reveal.in{opacity:1;transform:none;transition:opacity .45s var(--ease),transform .45s var(--ease)}
html.js .reveal.d1.in{transition-delay:.07s}
html.js .reveal.d2.in{transition-delay:.14s}
html.js .reveal.d3.in{transition-delay:.21s}
@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none}
  html.js .reveal.in{transition:none}
  .btn,.site-nav a,.card-link{transition:none}
  .btn:active{transform:none}
}

/* 404 */
.err-page{min-height:52vh;display:flex;align-items:center;text-align:left}
.err-page .mono{font-size:4rem;color:var(--teal);display:block;margin-bottom:6px}