/* ============================================================
   TMD Spec Review, shared design system
   Blueprint-blue technical aesthetic, light and fast.
   ============================================================ */
:root{
  --blueprint-blue:#0e2a45;   /* deep drafting navy */
  --blueprint-dark:#0a1f33;
  --tech-gray:#2b2822;        /* warm ink */
  --white:#ffffff;
  --accent:#4fc3f7;           /* blueprint cyan: for DARK surfaces */
  --terra:#b4552d;            /* terracotta: warm accent on paper */
  --brass:#b08d57;
  --paper:#f6f1e7;            /* cream paper body */
  --card:#fffdf8;             /* card stock */
  --sand:#d8cdb8;             /* drafted card borders */
  --bg-light:#efe8d9;
  --line:#ddd3c0;
  --muted:#8d846f;
  --good:#1a7f4b;
  --warn:#b26a00;
  --shell:1280px;
  --gutter:clamp(16px, 3vw, 48px);
}
*{box-sizing:border-box;}
h1,h2,h3{font-family:Georgia,'Times New Roman',serif;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  margin:0;background:var(--paper);color:#3b372e;line-height:1.6;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--blueprint-blue);}
.mono{font-family:'Courier New',monospace;}
.wrap{max-width:var(--shell);margin:0 auto;padding:0 var(--gutter);}
.eyebrow{color:var(--terra);font-weight:bold;font-size:.74rem;letter-spacing:2.5px;text-transform:uppercase;}

/* ---------- NAV ---------- */
.top-nav{
  padding:1rem var(--gutter);border-bottom:3px solid var(--accent);display:flex;
  justify-content:space-between;align-items:center;background:var(--blueprint-blue);
  position:sticky;top:0;z-index:1000;gap:1rem;flex-wrap:wrap;
}
.logo{font-family:'Courier New',monospace;font-weight:700;font-size:1.05rem;letter-spacing:.14em;color:#fff;text-decoration:none;}
.nav-links a{
  text-decoration:none;color:#cfe3f5;font-size:.78rem;font-weight:600;
  margin-left:1.4rem;text-transform:uppercase;letter-spacing:1px;
}
.nav-links a:hover{color:var(--accent);}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-block;background:var(--blueprint-blue);color:#fff;padding:.9rem 1.6rem;
  text-decoration:none;text-transform:uppercase;font-weight:700;font-size:.82rem;
  letter-spacing:1.5px;border:none;border-radius:3px;cursor:pointer;transition:.15s;
}
.btn:hover{background:var(--blueprint-dark);color:#fff;}
.btn.ghost{background:#fff;color:var(--blueprint-blue);border:1.5px solid var(--blueprint-blue);}
.btn.ghost:hover{background:var(--blueprint-blue);color:#fff;}

/* ---------- HERO ---------- */
.hero{
  padding:4.5rem 0 3.8rem;background:var(--blueprint-blue);
  border-bottom:4px solid var(--brass);position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(79,195,247,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(79,195,247,.08) 1px,transparent 1px);
  background-size:32px 32px;
}
.hero .wrap{position:relative;}
.hero .wrap:has(.hero-draft){display:grid;grid-template-columns:7fr 5fr;gap:3rem;align-items:center;}
@media(max-width:920px){.hero .wrap:has(.hero-draft){grid-template-columns:1fr;}.hero-draft{max-width:340px;margin:0 auto;}}
.hero .eyebrow{color:var(--accent);}
.hero .eyebrow.sheet1::before{content:"SHT 01 / ";color:#5b7a94;}
.hero h1{font-size:clamp(2.2rem,5.5vw,3.5rem);color:#fff;margin:.7rem 0;line-height:1.06;font-weight:700;}
.hero h1 em{font-style:italic;color:var(--accent);}
.hero p.lead{max-width:640px;font-size:1.1rem;color:#c3d4e4;margin:1.2rem 0 2rem;}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap;}
.hero .btn{background:var(--accent);color:var(--blueprint-dark);}
.hero .btn:hover{background:#7fd4fa;color:var(--blueprint-dark);}
.hero .btn.ghost{background:transparent;color:#dbe9f5;border:1.5px solid #4a6b88;}
.hero .btn.ghost:hover{border-color:var(--accent);color:var(--accent);background:transparent;}
.hero-draft{position:relative;}
.hero-draft svg{width:100%;height:auto;display:block;}
.draft-stamp{border:1px solid #2e5f80;color:#7fa8c8;font-size:.6rem;letter-spacing:.15em;padding:.4rem .7rem;transform:rotate(-1.5deg);display:inline-block;margin-top:.6rem;}

/* ---------- SECTIONS ---------- */
body{counter-reset:sheet 1;}
section .section-head .eyebrow::before,
section .tool-band .eyebrow::before{counter-increment:sheet;content:"SHT " counter(sheet,decimal-leading-zero) " / ";color:var(--brass);}
section{padding:4rem 0;}
section.alt{background:var(--bg-light);border-top:1px solid var(--sand);border-bottom:1px solid var(--sand);}
.section-head{margin-bottom:2rem;}
.section-head h2{font-size:2.1rem;color:var(--blueprint-blue);margin:.4rem 0 .3rem;font-weight:700;}
.section-head p{color:#555;margin:0;max-width:640px;}

/* ---------- CARDS ---------- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;}
.card{
  border:1px solid var(--sand);outline:1px solid var(--sand);outline-offset:3px;
  padding:1.6rem;background:var(--card);display:flex;flex-direction:column;transition:.15s;margin:4px;
}
.card:hover{box-shadow:0 8px 24px rgba(60,45,20,.1);transform:translateY(-2px);outline-color:var(--brass);}
.card .kicker{font-family:'Courier New',monospace;font-size:.7rem;letter-spacing:1px;text-transform:uppercase;color:var(--terra);font-weight:700;}
.card h3{margin:.5rem 0 .5rem;font-size:1.25rem;line-height:1.25;}
.card h3 a{color:var(--blueprint-blue);text-decoration:none;}
.card h3 a:hover{color:var(--terra);}
.card p{color:#55503f;font-size:.95rem;margin:0 0 1rem;flex:1;}
.card .more{font-weight:700;color:var(--blueprint-blue);text-transform:uppercase;font-size:.75rem;letter-spacing:1px;text-decoration:none;border-bottom:1px solid var(--brass);align-self:flex-start;padding-bottom:2px;}
.card .more:hover{color:var(--terra);}

/* Featured tool band */
.tool-band{display:flex;gap:2.5rem;flex-wrap:wrap;align-items:center;background:var(--card);border:1px solid var(--sand);outline:1px solid var(--sand);outline-offset:3px;padding:2.2rem;margin:4px;}
.tool-band .t-copy{flex:1.4;min-width:280px;}
.tool-band .t-copy h2{color:var(--blueprint-blue);font-size:1.8rem;margin:.3rem 0 .6rem;}
.tool-band .t-copy p{color:#55503f;margin:0 0 1.3rem;}
.tool-band .t-visual{flex:1;min-width:220px;font-family:'Courier New',monospace;color:#9fd4f5;background:var(--blueprint-blue);border:1px solid #2e5f80;padding:1.4rem;font-size:.85rem;line-height:1.9;background-image:linear-gradient(rgba(79,195,247,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(79,195,247,.07) 1px,transparent 1px);background-size:24px 24px;}

/* ---------- START HERE steps ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;}
.step{padding:1.4rem;border:1px solid var(--sand);background:var(--card);}
.step .num{font-family:'Courier New',monospace;font-weight:700;color:var(--terra);font-size:.85rem;}
.step h4{margin:.4rem 0 .5rem;color:var(--blueprint-blue);font-size:1.05rem;}
.step p{color:#55503f;font-size:.92rem;margin:0;}

/* ---------- NEWSLETTER ---------- */
.newsletter{background:var(--blueprint-blue);color:#fff;padding:2.5rem;text-align:center;background-image:linear-gradient(rgba(79,195,247,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(79,195,247,.06) 1px,transparent 1px);background-size:28px 28px;border-bottom:4px solid var(--brass);}
.newsletter h2{color:#fff;margin:0 0 .6rem;font-size:1.7rem;}
.newsletter p{color:#cfe0f0;margin:0 auto 1.5rem;max-width:520px;}
.newsletter form{display:flex;gap:.6rem;max-width:460px;margin:0 auto;flex-wrap:wrap;justify-content:center;}
.newsletter input[type=email]{flex:1;min-width:220px;padding:.9rem 1rem;border:none;border-radius:3px;font-size:1rem;font-family:inherit;}
.newsletter .btn{background:var(--accent);color:var(--blueprint-dark);}
.newsletter .btn:hover{background:#7fd4fa;color:var(--blueprint-dark);}
.newsletter .nl-msg{margin-top:1rem;font-size:.9rem;min-height:1.2em;color:#cfe0f0;}
.newsletter .fineprint{font-size:.72rem;color:#9db8d4;margin-top:.8rem;}
.hp{position:absolute!important;left:-9999px!important;}

/* ---------- AUTHORITY strip ---------- */
.authority{display:flex;gap:2.5rem;flex-wrap:wrap;align-items:center;}
.authority .a-photo{flex:none;width:170px;}
.authority .a-photo .frame{border:1px solid var(--sand);outline:1px solid var(--sand);outline-offset:3px;padding:10px;background:var(--card);}
.authority .a-photo .cap{font-family:'Courier New',monospace;font-size:.7rem;color:var(--terra);font-weight:700;letter-spacing:1px;text-align:center;margin-top:8px;}
.authority .a-copy{flex:1;min-width:300px;}
.authority .a-copy h2{color:var(--blueprint-blue);font-size:1.7rem;margin:0 0 .7rem;}
.authority .a-copy p{color:#444;margin:0 0 1rem;}

/* ---------- ARTICLE (guides) ---------- */
.article-wrap{max-width:780px;margin:3rem auto;padding:0 var(--gutter);}
.back-link{text-decoration:none;color:var(--blueprint-blue);font-weight:700;font-size:.75rem;text-transform:uppercase;letter-spacing:1px;display:inline-flex;align-items:center;gap:8px;margin-bottom:1.5rem;}
.back-link:hover{color:var(--terra);}
.article-meta{font-family:'Courier New',monospace;font-size:.72rem;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin-bottom:.5rem;}
.article h1{font-size:clamp(1.9rem,4.5vw,2.7rem);color:var(--blueprint-blue);line-height:1.1;margin:.2rem 0 1.2rem;}
.article h2{color:var(--blueprint-blue);font-size:1.5rem;margin:2.2rem 0 .6rem;}
.article h3{color:var(--tech-gray);font-size:1.15rem;margin:1.6rem 0 .5rem;}
.article p,.article li{font-size:1.05rem;color:#3b372e;}
.article ul{padding-left:1.3rem;}
.article strong{color:var(--tech-gray);}
.article hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0;}
.callout{background:var(--bg-light);border-left:4px solid var(--terra);padding:1.2rem 1.4rem;margin:2rem 0;font-size:.98rem;}
.callout strong{color:var(--blueprint-blue);}

/* Affiliate disclosure inline */
.disclosure-note{font-size:.8rem;color:var(--muted);background:var(--bg-light);border:1px solid var(--line);border-radius:3px;padding:.7rem .9rem;margin:1.5rem 0;}

/* ---------- FOOTER ---------- */
footer.site{padding:3rem var(--gutter);text-align:center;border-top:3px solid var(--accent);background:var(--blueprint-blue);margin-top:2rem;}
footer.site .follow{margin-bottom:1rem;}
footer.site .follow a{color:#cfe3f5;font-weight:700;text-decoration:none;font-size:.8rem;text-transform:uppercase;letter-spacing:1px;margin:0 .7rem;}
footer.site .follow a:hover{color:var(--accent);}
footer.site .fine{font-size:.8rem;color:#7fa8c8;margin:.3rem 0;}

/* ---------- RESPONSIVE ---------- */
@media(max-width:768px){
  .top-nav{flex-direction:column;align-items:flex-start;}
  .nav-links{margin-top:.6rem;}
  .nav-links a{margin:0 1.2rem 0 0;}
  .authority .a-photo{width:130px;}
}

/* Guides index: editorial list with filter/sort/search */
.gi-controls{display:flex;gap:.8rem;margin-bottom:1rem;flex-wrap:wrap;}
.gi-controls input[type=search]{flex:1;min-width:220px;padding:.7rem .9rem;border:1px solid var(--sand);border-radius:3px;font-size:.95rem;background:var(--card);font-family:inherit;}
.gi-controls select{padding:.7rem .9rem;border:1px solid var(--sand);border-radius:3px;font-size:.9rem;background:var(--card);font-family:inherit;}
.gi-controls input:focus,.gi-controls select:focus{outline:none;border-color:var(--terra);box-shadow:0 0 0 3px rgba(180,85,45,.14);}
.gi-pills{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.6rem;}
.gpill{background:var(--card);border:1.5px solid var(--sand);border-radius:20px;padding:.4rem .95rem;font-size:.78rem;font-weight:700;color:#55503f;cursor:pointer;}
.gpill.active{background:var(--blueprint-blue,#003366);border-color:var(--blueprint-blue,#003366);color:#fff;}
.gpill:hover:not(.active){border-color:var(--blueprint-blue,#003366);color:var(--blueprint-blue,#003366);}
.guide-list{border-top:2px solid var(--blueprint-blue);counter-reset:gi;}
.gitem{display:flex;gap:1.4rem;align-items:flex-start;padding:1.4rem .4rem;border-bottom:1px solid var(--sand);}
.gitem::before{counter-increment:gi;content:counter(gi,decimal-leading-zero);font-family:Georgia,serif;font-style:italic;font-size:1.8rem;color:#cbb98f;flex:none;width:52px;line-height:1;padding-top:.25rem;}
.gitem .gi-date{flex:none;width:92px;font-size:.72rem;color:#8a8a8a;padding-top:.35rem;letter-spacing:.5px;text-transform:uppercase;}
.gitem .gi-main{flex:1;min-width:0;}
.gitem .gi-main h3{margin:.15rem 0 .35rem;font-size:1.25rem;line-height:1.25;}
.gitem .gi-main h3 a{color:var(--blueprint-blue,#003366);text-decoration:none;}
.gitem .gi-main h3 a:hover{color:var(--terra);}
.gitem .gi-main p{margin:0;font-size:.92rem;color:#55503f;}
.gitem .gi-go{flex:none;align-self:center;font-size:1.4rem;color:var(--blueprint-blue,#003366);text-decoration:none;padding:.4rem .6rem;}
.gitem .gi-go:hover{color:var(--terra);}
@media(max-width:640px){.gitem{flex-direction:column;gap:.3rem;}.gitem::before{display:none;}.gitem .gi-date{width:auto;}.gitem .gi-go{display:none;}}