/* Grindstone Solar — shared design system
   Proposed brand: deep slate-blue + solar amber, clean modern sans.
   Replace placeholders ([...]) with real content. */

:root {
  --navy: #0B2A4A;
  --navy-2: #123A63;
  --amber: #F5A623;
  --amber-dark: #d98e0b;
  --ink: #1c2430;
  --slate: #5b6b7d;
  --line: #e4e9ef;
  --bg: #ffffff;
  --bg-soft: #f5f8fb;
  --white: #fff;
  --ok: #2e8b57;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(11,42,74,.08);
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); color: var(--ink);
  background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4 { line-height: 1.15; color: var(--navy); margin: 0 0 .5em; font-weight: 800; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }
a { color: var(--navy-2); text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 76px 0; }
.section.soft { background: var(--bg-soft); }
.center { text-align: center; }
.eyebrow { color: var(--amber-dark); font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; margin-bottom: .6rem; }
.lead { font-size: 1.15rem; color: var(--slate); max-width: 60ch; }
.center .lead { margin-left: auto; margin-right: auto; }

/* buttons */
.btn { display: inline-block; padding: 14px 24px; border-radius: 10px; font-weight: 700;
  cursor: pointer; border: 2px solid transparent; transition: .15s; font-size: 1rem; }
.btn-primary { background: var(--amber); color: #20160a; }
.btn-primary:hover { background: var(--amber-dark); }
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--navy); }
.btn-white { background: #fff; color: var(--navy); }

/* header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; color: var(--navy); font-size: 1.2rem; letter-spacing: -.02em; }
.brand .mark { width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(135deg, var(--amber), var(--amber-dark)); display: grid; place-items: center; color: #20160a; font-weight: 900; }
.nav-links { display: flex; gap: 22px; align-items: center; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink); font-weight: 600; font-size: .95rem; }
.nav-links a:hover { color: var(--amber-dark); }
.nav-cta { display: flex; gap: 12px; align-items: center; }
.nav-phone { font-weight: 700; color: var(--navy); white-space: nowrap; }
.menu-btn { display: none; background: none; border: 0; font-size: 1.6rem; cursor: pointer; color: var(--navy); }

/* hero */
.hero { background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 60%, #1b4f86 100%); color: #fff; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding-top: 64px; padding-bottom: 64px; }
.hero h1 { color: #fff; }
.hero p { color: #d6e3f1; font-size: 1.15rem; }
.hero .btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 18px; }
.hero-card { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); padding: 26px; }
.hero-card h3 { color: #fff; }
.hero-stats { display: flex; gap: 26px; margin-top: 26px; flex-wrap: wrap; }
.hero-stats .stat .n { font-size: 1.8rem; font-weight: 900; color: var(--amber); }
.hero-stats .stat .l { font-size: .85rem; color: #c4d4e6; }

/* trust bar */
.trustbar { background: var(--navy); color: #cfe0f1; }
.trustbar .wrap { display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between; padding: 18px 24px; font-weight: 600; font-size: .95rem; }
.trustbar b { color: #fff; }

/* grid cards */
.grid { display: grid; gap: 24px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.card .ico { width: 46px; height: 46px; border-radius: 10px; background: #fff4e0; color: var(--amber-dark); display: grid; place-items: center; font-size: 1.4rem; margin-bottom: 14px; }
.card h3 { margin-bottom: .35rem; }
.card p { color: var(--slate); margin: 0; font-size: .97rem; }

/* steps */
.steps { counter-reset: step; display: grid; gap: 20px; grid-template-columns: repeat(4,1fr); }
.step { position: relative; padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.step::before { counter-increment: step; content: counter(step); display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 50%; background: var(--navy); color: #fff; font-weight: 800; margin-bottom: 12px; }

/* projects */
.project { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); }
.project .ph { aspect-ratio: 16/10; background: linear-gradient(135deg,#cde0f2,#9fc0e0); display: grid; place-items: center; color: var(--navy); font-weight: 700; }
.project .body { padding: 18px 20px; }
.project .meta { display: flex; gap: 16px; color: var(--slate); font-size: .85rem; margin-top: 8px; }

/* testimonials */
.quote { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.quote .stars { color: var(--amber); letter-spacing: 2px; }
.quote p { font-size: 1.05rem; color: var(--ink); }
.quote .who { color: var(--slate); font-weight: 600; font-size: .9rem; }

/* CTA band */
.cta-band { background: linear-gradient(120deg, var(--amber), var(--amber-dark)); color: #20160a; border-radius: 18px; padding: 44px; text-align: center; }
.cta-band h2 { color: #20160a; }

/* footer */
.footer { background: var(--navy); color: #b9cbde; padding: 56px 0 28px; font-size: .95rem; }
.footer a { color: #d6e3f1; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: .8rem; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: .5rem; }
.footer .legal { border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: #8fa6bd; font-size: .85rem; }
.placeholder { background: #fff7e6; border-bottom: 1px dashed var(--amber-dark); }

/* responsive */
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2,1fr); }
  .steps { grid-template-columns: repeat(2,1fr); }
  .footer .cols { grid-template-columns: 1fr 1fr; }
  .nav-links, .nav-phone { display: none; }
  .menu-btn { display: block; }
  .nav-links.open { display: flex; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column;
    background: #fff; border-bottom: 1px solid var(--line); padding: 16px 24px; gap: 14px; }
}
@media (max-width: 560px) {
  .grid.cols-3, .grid.cols-4, .grid.cols-2, .steps, .footer .cols { grid-template-columns: 1fr; }
}