/* ============================================================
   Repair Cement — modern design system
   Fonts: Sora (display) + Inter (body)
   ============================================================ */
:root{
  --ink:#15191e;          /* near-black charcoal  */
  --ink-2:#2b313a;
  --slate:#5b6573;        /* muted body grey      */
  --slate-2:#828d9c;
  --line:#e6e9ee;         /* hairline borders     */
  --paper:#ffffff;
  --mist:#f5f7fa;         /* section tint         */
  --mist-2:#eef1f6;
  --accent:#e8722b;       /* industrial amber     */
  --accent-d:#c75c19;
  --accent-soft:#fff1e6;
  --steel:#2f6f8f;        /* secondary steel blue */
  --ok:#1f9d6b;
  --err:#d6453f;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(21,25,30,.04),0 8px 28px rgba(21,25,30,.07);
  --shadow-lg:0 24px 60px -18px rgba(21,25,30,.28);
  --wrap:1140px;
  --ease:cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{overflow-x:hidden}
body{
  margin:0;font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--paper);line-height:1.65;font-size:17px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:"Sora",system-ui,sans-serif;color:var(--ink);line-height:1.18;font-weight:700;letter-spacing:-.02em;margin:0 0 .5em}
a{color:var(--accent-d);text-decoration:none;transition:color .15s var(--ease)}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
p{margin:0 0 1.1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.muted{color:var(--slate)}
.center{text-align:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:"Sora",sans-serif;font-weight:600;
  font-size:.97rem;padding:.85em 1.5em;border-radius:999px;cursor:pointer;border:1.5px solid transparent;
  transition:transform .15s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);line-height:1}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px -6px rgba(232,114,43,.6)}
.btn-primary:hover{background:var(--accent-d);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px -8px rgba(232,114,43,.7)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{transform:translateY(-2px);color:var(--ink)}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(1.5) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:.6em;font-family:"Sora",sans-serif;font-weight:800;
  font-size:1.18rem;color:var(--ink);letter-spacing:-.03em}
.brand:hover{color:var(--ink)}
.brand .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-d));
  display:grid;place-items:center;color:#fff;font-size:1.05rem;box-shadow:0 4px 12px -3px rgba(232,114,43,.6)}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.nav-links a{font-family:"Sora",sans-serif;font-weight:500;font-size:.95rem;color:var(--ink-2);
  padding:.5em .85em;border-radius:8px;transition:background .15s,color .15s}
.nav-links a:hover{background:var(--mist);color:var(--ink)}
.nav-links a.cta{background:var(--ink);color:#fff;margin-left:6px}
.nav-links a.cta:hover{background:var(--accent)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;width:44px;height:44px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:4px auto;transition:.25s var(--ease)}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:84px 0 76px;background:
  radial-gradient(1200px 500px at 80% -10%,var(--accent-soft),transparent 60%),
  linear-gradient(180deg,var(--mist) 0%,#fff 100%);overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:
  linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px;opacity:.5;mask-image:radial-gradient(900px 380px at 75% 0,#000,transparent 70%)}
.hero-inner{position:relative;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:.5em;font-family:"Sora",sans-serif;font-weight:600;
  font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-d);
  background:var(--accent-soft);padding:.45em 1em;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(2.3rem,5.2vw,3.6rem);margin-bottom:.35em}
.hero h1 .hl{color:var(--accent)}
.hero p.lead{font-size:1.2rem;color:var(--slate);max-width:580px;margin-bottom:1.8em}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;margin-top:46px;flex-wrap:wrap}
.hero-stats .s b{font-family:"Sora",sans-serif;font-size:1.7rem;display:block;color:var(--ink)}
.hero-stats .s span{font-size:.85rem;color:var(--slate)}

/* ---------- sections ---------- */
section.block{padding:72px 0}
.sec-head{max-width:640px;margin:0 auto 44px;text-align:center}
.sec-head .eyebrow{margin-bottom:14px}
.sec-head h2{font-size:clamp(1.7rem,3.4vw,2.4rem)}
.sec-head p{color:var(--slate);font-size:1.08rem;margin:0}
.tint{background:var(--mist)}

/* ---------- card grid ---------- */
.grid{display:grid;gap:26px;grid-template-columns:repeat(auto-fill,minmax(310px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .2s var(--ease),box-shadow .25s var(--ease),border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--mist-2)}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.card:hover .thumb img{transform:scale(1.05)}
.card .body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.tag{display:inline-block;font-family:"Sora",sans-serif;font-size:.72rem;font-weight:600;text-transform:uppercase;
  letter-spacing:.06em;color:var(--accent-d);background:var(--accent-soft);padding:.35em .75em;border-radius:6px;margin-bottom:12px;align-self:flex-start}
.card h3{font-size:1.16rem;margin-bottom:.4em}
.card h3 a{color:var(--ink)}.card h3 a:hover{color:var(--accent-d)}
.card p{color:var(--slate);font-size:.95rem;margin:0 0 16px}
.card .more{margin-top:auto;font-family:"Sora",sans-serif;font-weight:600;font-size:.9rem;color:var(--accent-d);display:inline-flex;align-items:center;gap:.4em}
.card:hover .more{gap:.7em}

/* ---------- category chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:8px}
.chip{font-family:"Sora",sans-serif;font-weight:500;font-size:.9rem;color:var(--ink-2);background:#fff;
  border:1px solid var(--line);padding:.5em 1.1em;border-radius:999px;transition:.18s var(--ease)}
.chip:hover,.chip.active{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------- article ---------- */
.article-hero{padding:54px 0 0}
.crumbs{font-size:.85rem;color:var(--slate-2);margin-bottom:18px;font-family:"Sora",sans-serif}
.crumbs a{color:var(--slate)}
.article-hero h1{font-size:clamp(2rem,4.4vw,3rem);max-width:850px}
.article-meta{display:flex;align-items:center;gap:14px;margin-top:18px;color:var(--slate);font-size:.92rem}
.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--steel),#1d4d63);
  color:#fff;display:grid;place-items:center;font-family:"Sora",sans-serif;font-weight:700;font-size:1rem}
.feature-img{margin:36px 0 8px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:16/8;background:var(--mist-2)}
.feature-img img{width:100%;height:100%;object-fit:cover}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:54px;padding:46px 0 80px;align-items:start}
.prose{font-size:1.09rem;color:var(--ink-2);max-width:none}
.prose h2{font-size:1.55rem;margin:1.7em 0 .5em}
.prose h3{font-size:1.25rem;margin:1.5em 0 .4em}
.prose p{margin:0 0 1.25em}
.prose ul,.prose ol{margin:0 0 1.25em;padding-left:1.3em}
.prose li{margin:.4em 0}
.prose a{color:var(--accent-d);text-decoration:underline;text-decoration-color:rgba(232,114,43,.35);text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--accent)}
.prose b,.prose strong{color:var(--ink);font-weight:700}
.prose blockquote{margin:1.5em 0;padding:.6em 1.4em;border-left:4px solid var(--accent);background:var(--mist);
  border-radius:0 8px 8px 0;color:var(--ink-2);font-style:italic}
.prose img{border-radius:10px;margin:1.4em 0}
.sidebar{position:sticky;top:92px;display:flex;flex-direction:column;gap:24px}
.side-card{background:var(--mist);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.side-card h4{font-size:1.05rem;margin-bottom:14px}
.side-card ul{list-style:none;margin:0;padding:0}
.side-card li{margin:0 0 10px;font-size:.93rem;line-height:1.4}
.side-card li a{color:var(--ink-2)}.side-card li a:hover{color:var(--accent-d)}
.cta-card{background:linear-gradient(160deg,var(--ink),var(--ink-2));color:#fff;border:0}
.cta-card h4{color:#fff}.cta-card p{color:rgba(255,255,255,.7);font-size:.92rem;margin-bottom:16px}

/* related */
.related{border-top:1px solid var(--line);padding-top:50px}

/* ---------- forms ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-family:"Sora",sans-serif;font-weight:500;font-size:.9rem;margin-bottom:7px;color:var(--ink-2)}
.field input,.field textarea,.field select{width:100%;font-family:inherit;font-size:1rem;color:var(--ink);
  padding:.8em 1em;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:#fff;transition:border .15s,box-shadow .15s}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.field textarea{min-height:140px;resize:vertical}
.form-note{font-size:.85rem;color:var(--slate-2);margin-top:6px}
.form-msg{display:none;padding:.85em 1.1em;border-radius:var(--radius-sm);font-size:.93rem;margin-top:14px}
.form-msg.ok{display:block;background:#e9f8f1;color:#0f6b46;border:1px solid #bce8d4}
.form-msg.err{display:block;background:#fdeceb;color:#a52b27;border:1px solid #f5cbc9}

/* newsletter strip */
.newsletter{background:linear-gradient(150deg,var(--ink),#1d2530);color:#fff;border-radius:var(--radius);padding:46px;position:relative;overflow:hidden}
.newsletter::after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(232,114,43,.4),transparent 70%)}
.newsletter h3{color:#fff;font-size:1.6rem;position:relative}
.newsletter p{color:rgba(255,255,255,.72);position:relative;max-width:440px}
.nl-form{display:flex;gap:10px;flex-wrap:wrap;position:relative;margin-top:8px}
.nl-form input{flex:1;min-width:220px;padding:.85em 1.1em;border-radius:999px;border:1.5px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.08);color:#fff;font-size:1rem}
.nl-form input::placeholder{color:rgba(255,255,255,.55)}
.nl-form input:focus{outline:0;border-color:var(--accent);background:rgba(255,255,255,.14)}
.nl-form .form-msg{flex-basis:100%}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.66);padding:64px 0 30px;margin-top:10px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:42px;border-bottom:1px solid rgba(255,255,255,.1)}
.site-footer .brand{color:#fff;margin-bottom:14px}
.site-footer p{font-size:.93rem;color:rgba(255,255,255,.6)}
.foot-col h5{font-family:"Sora",sans-serif;color:#fff;font-size:.95rem;margin:0 0 16px;font-weight:600}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin:0 0 10px}
.foot-col a{color:rgba(255,255,255,.62);font-size:.93rem}
.foot-col a:hover{color:var(--accent)}
.foot-nl input{width:100%;margin-bottom:10px}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:24px;font-size:.85rem;color:rgba(255,255,255,.45)}
.foot-bottom a{color:rgba(255,255,255,.55)}

/* ---------- misc ---------- */
.pagewrap{padding:64px 0 80px}
.lead-block{max-width:720px}
.notfound{text-align:center;padding:120px 0}
.notfound .big{font-family:"Sora",sans-serif;font-size:7rem;font-weight:800;color:var(--accent);line-height:1;letter-spacing:-.04em}
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
.info-list{list-style:none;padding:0;margin:0}
.info-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.info-list .ico{width:42px;height:42px;border-radius:10px;background:var(--accent-soft);color:var(--accent-d);display:grid;place-items:center;flex-shrink:0;font-size:1.1rem}
.info-list b{font-family:"Sora",sans-serif;display:block;font-size:.95rem}
.info-list span{font-size:.92rem;color:var(--slate)}

/* ---------- responsive ---------- */
@media(max-width:920px){
  .article-layout{grid-template-columns:1fr;gap:32px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1;min-width:240px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .split{grid-template-columns:1fr;gap:36px}
}
@media(max-width:720px){
  body{font-size:16px}
  .nav-toggle{display:block}
  .nav-links{position:fixed;inset:70px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:12px 24px 22px;transform:translateY(-130%);
    transition:transform .3s var(--ease);box-shadow:var(--shadow-lg)}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:.85em .4em;border-radius:0;border-bottom:1px solid var(--line)}
  .nav-links a.cta{margin:10px 0 0;text-align:center;border-radius:999px}
  .hero{padding:56px 0 52px}
  .hero h1{font-size:clamp(1.7rem,6.6vw,2.3rem)}
  .hero p.lead{font-size:1.02rem}
  .wrap{padding:0 20px}
  .chips{justify-content:flex-start}
  .chip{font-size:.85rem;padding:.5em .9em}
  .hero-stats{gap:26px}
  section.block{padding:52px 0}
  .newsletter{padding:32px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
}