/* Silo City AI · AI Setup for Waco Businesses (silocityai.com)
   Palette: "Slate Sky" (charcoal + sky blue). All text pairs meet WCAG AA. */
:root{
  --ink:#111827; --muted:#4b5563; --line:#e1e4ea; --text-soft:#374151;
  --bg:#f6f7f9; --paper:#ffffff; --bg-alt:#eceef3;
  --primary:#1f2937; --primary-dark:#111827;          /* charcoal */
  --accent:#0369a1; --accent-dark:#075985;            /* sky blue (buttons, eyebrows, links) */
  --accent-bright:#0284c7;                            /* logo / decorative only */
  --accent-soft:#e0f2fe; --on-accent:#ffffff;
  --on-dark-accent:#7dd3fc;                           /* accent on charcoal bands */
  --tier-1:#0277b5; --tier-2:#0369a1; --tier-3:#1f2937; /* package colors: light sky, sky, charcoal */
  --input-border:#cfd4dc; --input-bg:#fcfcfd; --footer-text:#c3cdd8;
  --radius:14px; --shadow:0 1px 2px rgba(28,36,48,.06),0 8px 24px rgba(28,36,48,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
h1,h2,h3{font-family:Georgia,"Iowan Old Style","Times New Roman",serif;line-height:1.15;color:var(--primary-dark);margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5.6vw,3.4rem);letter-spacing:-.01em}
h2{font-size:clamp(1.65rem,3.8vw,2.3rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
a{color:var(--primary)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:700;color:var(--accent);margin-bottom:.6em}
.sub{color:var(--muted);margin-top:-.4em}

/* buttons */
.btn{display:inline-block;background:var(--accent);color:var(--on-accent);text-decoration:none;font-weight:700;padding:.75em 1.2em;border-radius:10px;border:2px solid var(--accent);text-align:center;cursor:pointer;font-size:1rem;transition:background .15s,transform .15s}
.btn:hover{background:var(--accent-dark);border-color:var(--accent-dark)}
.btn:active{transform:translateY(1px)}
.btn-lg{font-size:1.06rem;padding:.9em 1.4em}
.btn-sm{padding:.45em .9em;font-size:.92rem}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-block{display:block;width:100%}

/* top bar */
.topbar{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 94%,transparent);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:.55em;text-decoration:none;color:var(--primary-dark)}
.brand .logo{width:30px;height:30px;flex:none}
.brand .silo-a{fill:var(--accent-bright)} .brand .silo-b{fill:var(--primary)} .brand .ground{fill:var(--primary-dark)}
.brand .bands{stroke:var(--bg);stroke-width:1;opacity:.55;fill:none}
.brand strong em{font-style:normal;color:var(--accent)}
.brand span{display:flex;flex-direction:column;line-height:1.1}
.brand strong{font-family:Georgia,serif;font-size:1.12rem}
.brand small{font-size:.72rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:1.3em}
.nav a{text-decoration:none;font-weight:600;font-size:.95rem;color:var(--ink)}
.nav a.btn{color:var(--on-accent)}

/* hero */
.hero{padding:64px 0 56px;background:
  radial-gradient(900px 400px at 85% -10%,rgba(2,132,199,.12),transparent 60%),
  radial-gradient(700px 360px at -10% 0%,rgba(0,0,0,.035),transparent 60%)}
section{scroll-margin-top:68px}
.hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:48px;align-items:center}
.lead{font-size:1.15rem;color:var(--text-soft);max-width:36em}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:1.6em 0 1.2em}
.assurances{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:.95rem}
.assurances li::before{content:"✓";color:var(--accent);font-weight:800;margin-right:.4em}
.hero-card{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow)}
.hero-card-label{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:12px}
.hero-card-note{font-size:.82rem;color:var(--muted);margin:12px 0 0}
.phone{background:var(--bg-alt);border-radius:14px;padding:14px;display:flex;flex-direction:column;gap:8px}
.msg{max-width:85%;padding:.55em .85em;border-radius:16px;font-size:.95rem;line-height:1.4}
.msg-sys{align-self:center;background:transparent;color:var(--accent-dark);font-size:.8rem;font-weight:700;padding:0}
.msg-out{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}
.msg-in{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}

/* sections */
.section{padding:72px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid{display:grid;gap:20px;margin-top:28px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-services{grid-template-columns:repeat(3,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card p{color:var(--muted);margin:0;font-size:.97rem}
.icon{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);display:grid;place-items:center;margin-bottom:14px}
.icon svg{width:24px;height:24px;fill:none;stroke:var(--accent);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.callout{margin:32px 0 0;padding:18px 22px;border-left:4px solid var(--accent);background:var(--paper);border-radius:0 var(--radius) var(--radius) 0;font-weight:600;font-size:1.06rem}

.service{background:var(--paper);border-radius:var(--radius);padding:22px;border-top:4px solid var(--primary);box-shadow:var(--shadow)}
.service p{color:var(--muted);margin:0;font-size:.97rem}

/* packages */
.packages{align-items:stretch}
.pkg{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:28px 24px 24px;display:flex;flex-direction:column;box-shadow:var(--shadow);border-top:6px solid var(--c)}
.pkg-porch{--c:var(--tier-1)} .pkg-main{--c:var(--tier-2)} .pkg-star{--c:var(--tier-3)}
.pkg h3{font-size:1.5rem;margin-bottom:.2em}
.pkg-tag{color:var(--muted);font-style:italic;min-height:3em}
.price{font-weight:600;color:var(--muted);margin-bottom:1em}
.price .amt{font-family:Georgia,serif;font-size:2.4rem;color:var(--ink);font-weight:700}
.price .plus{display:block;color:var(--c);font-weight:700;font-size:1.05rem}
.pkg ul{list-style:none;padding:0;margin:0 0 1.5em;flex:1}
.pkg li{padding:.45em 0 .45em 1.6em;position:relative;border-top:1px dashed var(--line);font-size:.97rem}
.pkg li:first-child{border-top:0}
.pkg li::before{content:"✓";position:absolute;left:0;color:var(--c);font-weight:800}
.featured{box-shadow:0 0 0 2px var(--tier-2),0 14px 34px color-mix(in srgb,var(--tier-2) 18%,transparent)}
.badge{position:absolute;top:-14px;left:24px;background:var(--tier-2);color:#fff;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;padding:.3em .8em;border-radius:999px;margin:0}
.fine{margin-top:36px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px}
.fine h3{margin-bottom:.6em}
.fine ul{margin:0;padding-left:1.1em;color:var(--text-soft)}
.fine li{margin:.4em 0;font-size:.96rem}

/* guarantee */
.guarantee{background:var(--primary);color:#e8eef6}
.guarantee h2{color:#fff}
.guarantee .eyebrow{color:var(--on-dark-accent)}
.guarantee-inner{display:grid;grid-template-columns:160px 1fr;gap:40px;align-items:center;max-width:900px}
.seal{color:var(--on-dark-accent)}
.seal svg{width:160px;height:160px}
.guarantee p{font-size:1.08rem}
.guarantee .small{font-size:.97rem;color:#c3d0e0;margin:0}

/* steps */
.steps{list-style:none;padding:0;margin:28px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.steps li{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.steps p{color:var(--muted);margin:0;font-size:.97rem}
.num{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--accent);color:var(--on-accent);font-weight:800;font-family:Georgia,serif;font-size:1.2rem;margin-bottom:12px}

/* about */
.about{display:grid;grid-template-columns:140px 1fr;gap:36px;align-items:center;max-width:900px}
.monogram svg{width:56%;height:56%}
.monogram .silo-a{fill:var(--on-dark-accent)} .monogram .silo-b{fill:#fff} .monogram .ground{fill:var(--on-dark-accent)}
.monogram{width:140px;height:140px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-family:Georgia,serif;font-size:3rem;font-weight:700;box-shadow:inset 0 0 0 6px var(--bg-alt),inset 0 0 0 8px var(--accent)}
.about p:not(.eyebrow){color:var(--text-soft)}

/* faq */
details{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:0 20px;margin:12px 0}
summary{cursor:pointer;font-weight:700;padding:16px 28px 16px 0;list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:0;top:12px;font-size:1.4rem;color:var(--accent);font-weight:400}
details[open] summary::after{content:"–"}
details p{color:var(--muted);margin:0 0 16px}

/* contact */
.contact{background:linear-gradient(180deg,var(--bg),var(--bg-alt))}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-list{list-style:none;padding:0;margin:0 0 1.2em}
.contact-list li{margin:.3em 0;overflow-wrap:anywhere}
.notfit{display:inline-block;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary-dark);border-radius:10px;padding:.6em .9em;font-size:.93rem;font-weight:600}
.form{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:var(--shadow)}
.form label{display:block;font-weight:600;font-size:.95rem;margin-bottom:14px}
.opt{font-weight:400;color:var(--muted)}
.form input,.form select,.form textarea{display:block;width:100%;margin-top:6px;font:inherit;font-size:16px;padding:.7em .8em;border:1px solid var(--input-border);border-radius:10px;background:var(--input-bg);color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{outline:3px solid color-mix(in srgb,var(--accent) 30%,transparent);border-color:var(--accent)}
.form-note{font-size:.85rem;color:var(--muted);margin:10px 0 0;text-align:center}

/* footer */
.footer{background:var(--primary-dark);color:var(--footer-text);font-size:.92rem;padding:26px 0}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer p{margin:0}
.footer strong{color:#fff}

/* responsive */
@media (max-width:960px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-services{grid-template-columns:repeat(2,1fr)}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-card{max-width:460px}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav a:not(.btn){display:none}
  .section{padding:52px 0}
  .hero{padding:40px 0 44px}
  .grid-3,.steps,.contact-grid{grid-template-columns:1fr}
  .packages{gap:28px}
  .pkg-tag{min-height:0}
  .contact-grid{gap:28px}
  .guarantee-inner{grid-template-columns:1fr;gap:16px;text-align:left}
  .seal svg{width:96px;height:96px}
  .about{grid-template-columns:1fr;gap:20px}
  .monogram{width:96px;height:96px;font-size:2rem}
}
@media (max-width:520px){
  .grid-4,.grid-services{grid-template-columns:1fr}
  .cta-row .btn{width:100%}
  .brand small{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}