/* ============================================================
   AECOtech — placeholder site styles
   Brand: light, monochrome — matches the AECOtech logo palette
   (white base, charcoal ink, translucent grey circle motif)
   ============================================================ */

:root {
  --bg:        #ffffff;
  --bg-alt:    #f4f5f7;
  --surface:   #ffffff;
  --border:    #e4e7ec;
  --ink:       #15171c;   /* near-black, primary text + actions */
  --ink-soft:  #2b2f38;
  --muted:     #61697a;
  --accent:    #15171c;   /* monochrome: black is the accent */
  --on-accent: #ffffff;
  --radius:    14px;
  --maxw:      1140px;
  --shadow:    0 18px 50px rgba(21,23,28,.08);
  --shadow-sm: 0 6px 20px rgba(21,23,28,.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { line-height: 1.13; margin: 0 0 .5em; font-weight: 800; letter-spacing: -.025em; color: var(--ink); }
h1 { font-size: clamp(2.3rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.05rem; font-weight: 700; }
p  { margin: 0 0 1rem; }
a  { color: var(--ink); text-decoration: none; }
em { color: var(--muted); font-style: italic; }

.accent { color: var(--muted); }   /* "tech" subdued, like the logo */

.eyebrow {
  text-transform: uppercase;
  letter-spacing: .2em;
  font-size: .76rem;
  font-weight: 700;
  color: var(--muted);
  margin: 0 0 .9rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  padding: .7rem 1.35rem;
  border-radius: 999px;
  border: 2px solid var(--accent);
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease, color .12s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn-lg { padding: .95rem 1.85rem; font-size: 1.05rem; }
.btn-sm { padding: .5rem 1.05rem; font-size: .9rem; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: .65rem; font-size: 1.45rem; font-weight: 800; letter-spacing: -.03em; color: var(--ink); }
.brand-logo { height: 38px; width: auto; display: block; }
.brand-mark.accent { color: var(--muted); }
.nav-links { list-style: none; display: flex; gap: 1.7rem; align-items: center; margin: 0; padding: 0; }
.nav-links a { color: var(--muted); font-weight: 500; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.btn { color: var(--on-accent); }
.nav-toggle, .nav-toggle-label { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(4.5rem, 11vw, 9rem) 0 clamp(3.5rem, 6vw, 5.5rem);
  background: var(--bg);
}
/* overlapping translucent circles — echoes the logo mark */
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%;
  background: rgba(21,23,28,.05); z-index: 0;
}
.hero::before { width: 520px; height: 520px; top: -120px; right: -80px; }
.hero::after  { width: 420px; height: 420px; top: 40px;  right: 180px; background: rgba(21,23,28,.035); }
.hero-inner { position: relative; z-index: 1; max-width: 820px; }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 640px; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin: 2rem 0 0; }
.hero-stats { list-style: none; display: flex; gap: 2.8rem; flex-wrap: wrap; margin: 3rem 0 0; padding: 0; }
.hero-stats strong { display: block; font-size: 2rem; color: var(--ink); }
.hero-stats span { color: var(--muted); font-size: .9rem; }

/* ---------- Trust strip ---------- */
.trust { padding: 2.5rem 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-alt); }
.trust-label { text-align: center; color: var(--muted); font-size: .82rem; text-transform: uppercase; letter-spacing: .16em; margin-bottom: 1.2rem; }
.logo-row { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.logo-row-wrap { gap: 1rem; }
.logo-chip {
  border: 1px solid var(--border); border-radius: 999px;
  padding: .5rem 1.15rem; color: var(--ink-soft); font-weight: 500; font-size: .95rem;
  background: var(--surface);
}

/* ---------- Sections ---------- */
.section { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 660px; margin: 0 auto 3rem; text-align: center; }
.section-sub { color: var(--muted); font-size: 1.1rem; }

/* ---------- Cards ---------- */
.cards { display: grid; gap: 1.5rem; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2rem 1.8rem;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #d7dbe2; }
.card p { color: var(--muted); }
.card-sm { padding: 1.5rem; }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: var(--bg-alt); color: var(--ink); font-size: 1.5rem; margin-bottom: 1.1rem;
}
.card-link { font-weight: 600; color: var(--ink); }
.card-link:hover { text-decoration: underline; }

/* ---------- Feature grid ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.8rem 2.5rem; }
.feature { border-left: 2px solid var(--ink); padding-left: 1.1rem; }
.feature p { color: var(--muted); margin: 0; }

/* ---------- Split sections ---------- */
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 3.5rem; align-items: center; }
.split-text p { color: var(--muted); }
.about-narrow { max-width: 720px; }
.about-narrow p { color: var(--muted); font-size: 1.1rem; }
.tick-list { list-style: none; padding: 0; margin: 1.2rem 0 2rem; }
.tick-list li { padding-left: 1.8rem; position: relative; margin-bottom: .6rem; color: var(--ink-soft); }
.tick-list li::before { content: "—"; position: absolute; left: 0; color: var(--ink); font-weight: 800; }

/* ---------- Mock ribbon visual ---------- */
.mock-ribbon { background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.mock-tab { display: inline-block; background: var(--accent); color: var(--on-accent); font-weight: 700; padding: .35rem .9rem; border-radius: 8px 8px 0 0; font-size: .9rem; }
.mock-panels { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin-top: .8rem; }
.mock-panels span { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: .9rem .5rem; text-align: center; font-size: .85rem; color: var(--muted); }

/* ---------- Projects ---------- */
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.project {
  position: relative; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: var(--surface); min-height: 200px;
  display: flex; flex-direction: column; justify-content: flex-end;
  transition: transform .15s ease, box-shadow .15s ease;
}
.project:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.project-thumb { height: 130px; background: linear-gradient(135deg, #d9dde4, #eef0f3); position: relative; }
.project-thumb::after { content: "Image placeholder"; position: absolute; inset: 0; display: grid; place-items: center; color: #9aa3b2; font-size: .8rem; letter-spacing: .05em; }
.project-body { padding: 1.1rem 1.3rem 1.4rem; }
.project-body h4 { margin-bottom: .25rem; }
.project-body p { color: var(--muted); font-size: .9rem; margin: 0; }
.project-tag { display: inline-block; font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); font-weight: 700; margin-bottom: .5rem; }

/* ---------- Quote ---------- */
.quote { margin: 0; font-size: 1.25rem; line-height: 1.5; border-left: 3px solid var(--ink); padding-left: 1.5rem; color: var(--ink); }
.quote cite { display: block; margin-top: 1rem; font-size: .9rem; color: var(--muted); font-style: normal; }

/* ---------- CTA / Contact ---------- */
.cta { background: var(--bg-alt); text-align: center; }
.cta-inner { max-width: 640px; margin: 0 auto; }
.cta-inner > p { color: var(--muted); }
.contact-form { margin: 2rem 0 1.5rem; text-align: left; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.contact-form input, .contact-form textarea {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: .85rem 1rem; color: var(--ink); font: inherit; margin-bottom: 1rem;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--ink); }
.form-note { font-size: .8rem; color: var(--muted); margin-top: .5rem; }
.contact-direct { color: var(--muted); }
.contact-direct a { text-decoration: underline; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 3rem 0; background: var(--bg); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 1rem; }
.footer-logo { height: 46px; width: auto; }
.footer-tag { color: var(--muted); margin: 0; }
.footer-links { display: flex; gap: 1.3rem; flex-wrap: wrap; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--ink); }
.copyright { color: var(--muted); font-size: .85rem; width: 100%; margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .cards-3, .cards-4, .feature-grid, .project-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; gap: 2rem; }
  .nav-toggle-label { display: flex; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
  .nav-toggle-label span { width: 26px; height: 2px; background: var(--ink); border-radius: 2px; }
  .nav-links {
    position: absolute; top: 70px; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: flex-start; gap: 0;
    max-height: 0; overflow: hidden; transition: max-height .25s ease; padding: 0 24px;
  }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: .9rem 0; width: 100%; }
  .nav-toggle:checked ~ .nav-links { max-height: 460px; padding: .5rem 24px 1rem; }
}
@media (max-width: 560px) {
  .cards-3, .cards-4, .feature-grid, .project-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.8rem; }
}