/* ===========================================================
   Magnolab — Engineering Site Stylesheet
   Palette: blueprint blues/grays, precision-grid signature
   =========================================================== */

:root {
  --ink:        #10202E;   /* near-black navy for text */
  --blue-deep:  #1B3A5C;   /* primary brand blue */
  --blue-mid:   #2E5C8A;   /* links / accents */
  --blue-line:  #7FA8C9;   /* blueprint grid lines */
  --gray-bg:    #F4F6F8;   /* page background */
  --gray-panel: #E7ECF0;   /* card / panel background */
  --white:      #FFFFFF;
  --line:       #D3DCE3;

  --font-display: 'IBM Plex Sans', 'Segoe UI', Arial, sans-serif;
  --font-body:    'IBM Plex Sans', 'Segoe UI', Arial, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--gray-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--blue-mid); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--blue-deep); outline-offset: 2px; }

img { max-width: 100%; display: block; }

/* ---------- Layout helpers ---------- */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 72px 0; }

/* ---------- Blueprint grid signature ---------- */
.blueprint-band {
  position: relative;
  background-color: var(--blue-deep);
  background-image:
    linear-gradient(var(--blue-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center;
}
.blueprint-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(27,58,92,0.92), rgba(27,58,92,0.85));
}
.blueprint-band > * { position: relative; z-index: 1; }

/* ---------- Header / Nav ---------- */
header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: 1100px;
  margin: 0 auto;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
}
.brand img {
  height: 40px;
  width: auto;
  display: block;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
}
nav a {
  color: var(--ink);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
nav a:hover, nav a[aria-current="page"] {
  text-decoration: none;
  border-bottom-color: var(--blue-deep);
}

.nav-toggle { display: none; }

@media (max-width: 720px) {
  nav ul { gap: 18px; }
  .brand img { height: 32px; }
}

/* ---------- Dropdown submenu ---------- */
.has-dropdown { position: relative; }
.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: -16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: 0 12px 28px rgba(16,32,46,0.12);
  list-style: none;
  margin: 8px 0 0;
  padding: 8px;
  min-width: 230px;
  z-index: 20;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
  display: block;
}
.dropdown li { margin: 0; }
.dropdown a {
  display: block;
  padding: 9px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  border-bottom: none;
  border-radius: 2px;
  white-space: nowrap;
}
.dropdown a:hover {
  background: var(--gray-panel);
  text-decoration: none;
}
@media (max-width: 900px) {
  .dropdown { position: static; box-shadow: none; border: none; padding: 4px 0 4px 16px; margin: 4px 0 0; min-width: 0; width: 100%; display: block; }
  .dropdown a { white-space: normal; }
}
@media (max-width: 560px) {
  .nav { flex-wrap: wrap; }
  nav { order: 3; width: 100%; }
  nav ul { flex-direction: column; align-items: flex-start; gap: 4px; }
  .has-dropdown { width: 100%; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 88px;
  color: var(--white);
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-line);
  margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.1;
  margin: 0 0 20px;
  max-width: 16ch;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.hero p {
  font-size: 1.15rem;
  max-width: 52ch;
  color: #DCE7F0;
  margin: 0 0 32px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--white);
  color: var(--blue-deep);
}
.btn-primary:hover { background: #E9F0F6; text-decoration: none; }
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
  margin-left: 12px;
}
.btn-outline:hover { border-color: var(--white); text-decoration: none; }
.btn-dark {
  background: var(--blue-deep);
  color: var(--white);
}
.btn-dark:hover { background: var(--ink); text-decoration: none; }

/* ---------- Section headings ---------- */
.section-head { margin-bottom: 44px; max-width: 60ch; }
.section-head .eyebrow { color: var(--blue-mid); }
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 12px;
  font-weight: 700;
  color: var(--ink);
}
.section-head p { color: #445566; margin: 0; }
.on-dark .section-head p { color: #C7D6E3; }
.on-dark .section-head h2 { color: var(--white); }

/* ---------- Cards / grids ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 820px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 32px 28px;
  border-radius: 3px;
}
.card .index {
  font-family: var(--font-mono);
  color: var(--blue-line);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
  display: block;
}
.card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  color: var(--ink);
}
.card p { margin: 0; color: #445566; font-size: 0.96rem; }

/* ---------- Stats strip ---------- */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 36px 0;
}
.stat .num {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--blue-deep);
  line-height: 1;
}
.stat .label {
  font-size: 0.85rem;
  color: #5A6C7A;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---------- Panel / alt background ---------- */
.panel { background: var(--gray-panel); }

/* ---------- Timeline (About page) ---------- */
.timeline { border-left: 2px solid var(--blue-line); padding-left: 28px; }
.timeline .item { position: relative; margin-bottom: 36px; }
.timeline .item:last-child { margin-bottom: 0; }
.timeline .item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 4px;
  width: 10px; height: 10px;
  background: var(--blue-deep);
  border-radius: 50%;
}
.timeline .year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue-mid);
  display: block;
  margin-bottom: 6px;
}
.timeline h3 { margin: 0 0 6px; font-size: 1.05rem; }
.timeline p { margin: 0; color: #445566; }

/* ---------- Contact form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
}
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }

form { display: flex; flex-direction: column; gap: 18px; }
label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  display: block;
}
input, textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--white);
  color: var(--ink);
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--blue-deep);
  box-shadow: 0 0 0 3px rgba(27,58,92,0.12);
}
textarea { resize: vertical; min-height: 140px; }

.info-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 28px;
  border-radius: 3px;
}
.info-card dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-mid);
  margin-top: 20px;
}
.info-card dt:first-child { margin-top: 0; }
.info-card dd { margin: 4px 0 0; color: var(--ink); }

/* ---------- CTA band ---------- */
.cta {
  text-align: center;
  padding: 64px 0;
}
.cta h2 { color: var(--white); margin: 0 0 24px; font-size: clamp(1.5rem, 3vw, 2rem); }

/* ---------- Footer ---------- */
footer {
  background: var(--ink);
  color: #A9BACB;
  padding: 40px 0;
  font-size: 0.88rem;
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
footer a { color: #C7D6E3; }
footer .foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  list-style: none;
  padding: 0;
  margin: 0;
}
@media (max-width: 620px) {
  footer .wrap { flex-direction: column; align-items: flex-start; }
  footer .foot-links { gap: 10px 18px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}