/* ============================================================================
   Adducia site styles (placeholder branding)
   Self-contained: system fonts, no external requests, no JavaScript.
   Theme is variable-driven. To flip light <-> dark, edit the :root block.
   ============================================================================ */

:root {
  --paper:      #ffffff;   /* page background (light sections) */
  --paper-2:    #f5f7fa;   /* alternating section background */
  --ink:        #0a0e16;   /* dark band background */
  --ink-2:      #121a2b;   /* card surface on dark bands */
  --text:       #141821;   /* body text on light */
  --text-2:     #586173;   /* muted text on light */
  --on-dark:    #e9edf4;   /* text on dark bands */
  --on-dark-2:  #98a4b8;   /* muted text on dark bands */
  --line:       #e5e8ee;   /* hairline on light */
  --line-dark:  #243049;   /* hairline on dark */
  --accent:     #2550e6;   /* aerospace blue */
  --accent-2:   #1c3fc4;   /* accent hover */
  --radius:     14px;
  --container:  1140px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--paper);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }

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

/* ---------- Navigation ---------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 650; font-size: 17px; letter-spacing: -0.01em; }
.brand svg { width: 26px; height: 26px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-size: 14.5px; color: var(--text-2); font-weight: 500;
  padding: 8px 12px; border-radius: 8px; transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--paper-2); }
.nav-links a.active { color: var(--text); }
.nav-cta {
  background: var(--accent) !important; color: #fff !important;
  margin-left: 8px; padding: 9px 16px !important; font-weight: 600;
}
.nav-cta:hover { background: var(--accent-2) !important; }
/* Toggle stays focusable (not display:none) so the mobile menu works from a keyboard. */
.nav-toggle { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.nav-toggle:focus-visible ~ .nav-burger { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.nav-burger { display: none; }

/* ---------- Buttons ------------------------------------------------------- */
.btn, .btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 600; padding: 13px 24px;
  border-radius: 10px; cursor: pointer; transition: all .15s; border: 1px solid transparent;
}
.btn { background: var(--accent); color: #fff; }
.btn:hover { background: var(--accent-2); }
.btn-ghost { background: transparent; color: var(--on-dark); border-color: var(--line-dark); }
.btn-ghost:hover { border-color: var(--on-dark-2); }
.btn-ghost.on-light { color: var(--text); border-color: var(--line); }
.btn-ghost.on-light:hover { border-color: var(--text-2); }

/* ---------- Generic section scaffolding ---------------------------------- */
section { padding: 92px 0; }
.section-tight { padding: 64px 0; }
.eyebrow {
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  font-weight: 700; color: var(--accent);
}
.eyebrow.on-dark { color: #7ea0ff; }
h1 { font-size: clamp(34px, 6vw, 62px); font-weight: 650; letter-spacing: -0.025em; line-height: 1.06; }
h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 650; letter-spacing: -0.02em; line-height: 1.15; }
h3 { font-size: 19px; font-weight: 650; letter-spacing: -0.01em; }
.lead { font-size: clamp(17px, 2.1vw, 20px); color: var(--text-2); line-height: 1.6; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head h2 { margin: 14px 0 16px; }

/* ---------- Hero (dark) -------------------------------------------------- */
.hero { position: relative; background: var(--ink); color: var(--on-dark); overflow: hidden; }
.hero .container { position: relative; z-index: 2; }
.hero-home { padding: 120px 0 116px; }
.hero-page { padding: 92px 0 84px; }
.hero h1 { color: #fff; max-width: 16ch; }
.hero-page h1 { max-width: 20ch; }
.hero .lead { color: var(--on-dark-2); max-width: 60ch; margin-top: 22px; }
.hero-cta { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-graph { position: absolute; inset: 0; z-index: 1; opacity: .5; pointer-events: none; }
.hero-graph svg { width: 100%; height: 100%; }

/* ---------- Cards & grids ------------------------------------------------ */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(16,24,40,.06); border-color: #d4d9e2; }
.card h3 { margin-bottom: 9px; }
.card p { color: var(--text-2); font-size: 15.5px; }
.card .ic {
  width: 40px; height: 40px; border-radius: 10px; margin-bottom: 16px;
  display: grid; place-items: center; background: #eef2ff; color: var(--accent);
}
.card .ic svg { width: 21px; height: 21px; }

/* numbered steps */
.step .num {
  width: 34px; height: 34px; border-radius: 9px; background: var(--ink); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: 15px; margin-bottom: 16px;
}

/* ---------- Bands -------------------------------------------------------- */
.band-alt { background: var(--paper-2); }
.band-dark { background: var(--ink); color: var(--on-dark); }
.band-dark h2 { color: #fff; }
.band-dark .lead { color: var(--on-dark-2); }
.band-dark .card { background: var(--ink-2); border-color: var(--line-dark); }
.band-dark .card p { color: var(--on-dark-2); }
.band-dark .card .ic { background: #1b2540; color: #7ea0ff; }
.band-dark .split li { color: var(--on-dark-2); }
.band-dark .split li b { color: #fff; }
.band-dark .split li::before { background: #18223c; box-shadow: inset 0 0 0 2px #5b82ff; }

/* ---------- Stat / problem row ------------------------------------------ */
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.stat { padding: 26px; border-radius: var(--radius); background: var(--paper-2); border: 1px solid var(--line); }
.stat .k { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; }
.stat p { color: var(--text-2); font-size: 15px; margin-top: 6px; }

/* ---------- Ask / query examples ---------------------------------------- */
.asklist { display: grid; gap: 12px; margin-top: 8px; }
.ask {
  display: flex; align-items: center; gap: 14px; padding: 16px 20px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 12px; font-size: 16px;
}
.ask .q { color: var(--accent); font-weight: 700; }

/* ---------- Split (two-column content) ---------------------------------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.split ul { list-style: none; margin-top: 22px; display: grid; gap: 14px; }
.split li { position: relative; padding-left: 30px; color: var(--text-2); }
.split li::before {
  content: ""; position: absolute; left: 0; top: 9px; width: 16px; height: 16px;
  border-radius: 5px; background: #eef2ff;
  box-shadow: inset 0 0 0 2px var(--accent);
}
.split li b { color: var(--text); font-weight: 650; }

/* ---------- CTA band ----------------------------------------------------- */
.cta-band { text-align: center; }
.cta-band .lead { margin: 16px auto 30px; max-width: 56ch; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Contact ------------------------------------------------------ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.contact-card { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.contact-card .label { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-2); font-weight: 700; }
.contact-card .val { font-size: 19px; font-weight: 600; margin-top: 8px; }
.contact-card .val a { color: var(--accent); }
.notice { margin-top: 28px; padding: 16px 20px; background: #fff8ec; border: 1px solid #f1dfb8; border-radius: 12px; font-size: 14.5px; color: #6b5824; }

/* ---------- Product mock (illustrative, synthetic data only) ------------- */
/* A hand-built visual of the interface — never a screenshot of, or link to, the private product app. */
.mock {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: 0 18px 44px rgba(16,24,40,.08);
}
.band-dark .mock { box-shadow: 0 18px 44px rgba(0,0,0,.35); border-color: transparent; }
.mock-q {
  display: flex; gap: 10px; align-items: center; padding: 11px 14px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 10px;
  font-size: 14.5px; color: var(--text);
}
.mock-q .q { color: var(--accent); font-weight: 700; }
.mock-a { font-size: 14.5px; line-height: 1.55; color: var(--text); margin: 16px 2px 14px; }
.mock-ev { display: grid; gap: 8px; }
.mock-ev .row { border: 1px solid var(--line); border-radius: 9px; padding: 9px 12px; }
.mock-ev .rh { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--text); }
.mk-chip {
  font-size: 10.5px; font-weight: 700; letter-spacing: .02em; color: #3a4ba8;
  background: #eef2ff; border: 1px solid #dbe2fb; border-radius: 999px; padding: 1px 8px; white-space: nowrap;
}
.mk-chip.ok { color: #177245; background: #eefaf1; border-color: #c7ecd4; }
.mk-chip.warn { color: #b45309; background: #fdf4e3; border-color: #f0d8a8; }
.mk-loc {
  margin-left: auto; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 11px; color: var(--text-2); background: var(--paper-2); border-radius: 6px; padding: 2px 7px; white-space: nowrap;
}
.mock-quote { font-size: 12px; color: var(--text-2); border-left: 2px solid var(--line); padding-left: 9px; margin-top: 7px; }
.mock-cap { margin-top: 14px; font-size: 12.5px; color: var(--text-2); }
.band-dark .mock-cap { color: var(--on-dark-2); }
/* report mock */
.mock-title { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 15px; margin-bottom: 14px; color: var(--text); }
.mock-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 12px; }
.mc { border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; }
.mc .n { font-size: 20px; font-weight: 700; letter-spacing: -.02em; color: var(--text); }
.mc .k { font-size: 11px; color: var(--text-2); margin-top: 2px; }
.mc.warn .n { color: #b45309; } .mc.crit .n { color: #b91c1c; } .mc.good .n { color: #15803d; }

/* ---------- FAQ (native details/summary, no JavaScript) ------------------ */
.faq { border: 1px solid var(--line); border-radius: 12px; background: var(--paper); padding: 0 20px; }
.faq + .faq { margin-top: 10px; }
.faq summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between;
  gap: 14px; padding: 16px 0; font-weight: 600; font-size: 15.5px; color: var(--text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 20px; font-weight: 500; color: var(--text-2); transition: transform .15s; flex-shrink: 0; }
.faq[open] summary::after { transform: rotate(45deg); }
.faq p { color: var(--text-2); font-size: 14.5px; padding: 0 0 16px; max-width: 72ch; }

/* ---------- Footer ------------------------------------------------------- */
.footer { background: var(--ink); color: var(--on-dark-2); padding: 60px 0 34px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer .brand { color: #fff; }
.footer-blurb { margin-top: 14px; font-size: 14.5px; max-width: 34ch; }
.footer h4 { color: var(--on-dark); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 14px; }
.footer-col a { display: block; color: var(--on-dark-2); font-size: 14.5px; padding: 5px 0; transition: color .15s; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line-dark);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px;
}

/* ---------- Founder bio (company.html) ----------------------------------- */
.founder { margin-top: 44px; }
.founder-card {
  display: flex; gap: 22px; align-items: flex-start;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; max-width: 760px;
}
.founder-avatar {
  flex: 0 0 auto; width: 72px; height: 72px; border-radius: 50%;
  background: #eef3fd; color: var(--accent); border: 1px solid #dbe2fb;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 20px; letter-spacing: .02em;
  object-fit: cover; /* also styles a real <img> when a photo replaces the initials */
}
.founder-card h3 { font-size: 19px; margin-bottom: 8px; }
.founder-role { color: var(--text-2); font-weight: 500; font-size: 15px; }
.founder-card p { color: var(--text-2); font-size: 15.5px; }
.founder-link {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 14px;
  color: var(--accent); font-weight: 600; font-size: 14.5px;
}
.founder-link svg { width: 16px; height: 16px; }
.founder-link:hover { color: var(--accent-2); }

/* ---------- Responsive --------------------------------------------------- */
@media (max-width: 860px) {
  .grid-3, .grid-2, .stat-row, .footer-top, .contact-grid { grid-template-columns: 1fr; }
  .founder-card { flex-direction: column; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  section { padding: 68px 0; }
  .hero-home { padding: 92px 0 84px; }

  /* CSS-only mobile menu (no JavaScript) */
  .nav-burger {
    display: inline-flex; flex-direction: column; gap: 5px; cursor: pointer;
    padding: 10px; margin: -10px;
  }
  .nav-burger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .2s; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 12px 16px 18px;
    max-height: 0; overflow: hidden; opacity: 0; visibility: hidden; transition: .2s;
  }
  .nav-links a { padding: 12px; border-radius: 8px; font-size: 16px; }
  .nav-cta { margin-left: 0 !important; text-align: center; margin-top: 6px; }
  .nav-toggle:checked ~ .nav-links { max-height: 480px; opacity: 1; visibility: visible; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}