/* ==========================================================================
   EXCEL SYSTEMS (PRIVATE) LIMITED — Site stylesheet
   --------------------------------------------------------------------------
   PALETTE: everything colored on this site pulls from the tokens below.
   To test a new palette, change ONLY the values in :root — nothing else
   in this file (or in any page) needs to change.

   Currently loaded: "Charcoal & Gold" — a deliberate choice, closest in
   spirit to the original hexagon mark, and the most common palette family
   among established defense integrators (navy/charcoal + a metallic accent).

   Other palettes explored earlier in this project, for quick reference:
     Navy & Brass:        --color-ink:#14213D  --color-accent:#9C7A2B
     Bottle Green & Sand: --color-ink:#1F3B2C  --color-accent:#C8A874
   ========================================================================== */

:root {
  /* -- Core palette (swap these) -- */
  --color-ink:        #1C1C1A;   /* primary dark — headers, nav, footer */
  --color-ink-soft:    #2E2E2A;  /* secondary dark — cards, panels on dark bg */
  --color-accent:      #B8935A; /* brass/gold — links, dividers, emphasis */
  --color-accent-soft: #E4D3B0; /* pale accent — subtle fills, hover states */
  --color-paper:       #F4F2ED; /* off-white page background */
  --color-paper-alt:   #E9E5DC; /* slightly deeper off-white for section bands */
  --color-text:        #23221F; /* body copy on light backgrounds */
  --color-text-on-ink: #F4F2ED; /* body copy on dark backgrounds */
  --color-line:        rgba(28,28,26,0.14); /* hairline dividers on light bg */
  --color-line-on-ink:  rgba(244,242,237,0.16); /* hairline dividers on dark bg */

  /* -- Type -- */
  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  /* -- Scale -- */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 7rem;
  --radius: 2px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-paper);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, .eyebrow {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
  margin: 0;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); line-height: 1.05; letter-spacing: 0.01em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); color: var(--color-ink); }
h3 { font-size: 1.05rem; letter-spacing: 0.08em; color: var(--color-accent); }

p { margin: 0 0 1.1em; max-width: 62ch; }
a { color: inherit; }

.eyebrow {
  font-size: 0.78rem;
  color: var(--color-accent);
  letter-spacing: 0.18em;
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--space-md); }

/* -- Header / nav -- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--color-ink);
  border-bottom: 1px solid var(--color-line-on-ink);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 0.5rem; padding-bottom: 0.5rem;
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand img { height: 78px; width: auto; }
.brand-word {
  display: inline-flex;
  font-family: "Poppins", var(--font-display);
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand-word .big { font-size: 1.9rem; line-height: 1; }
.brand-word .small { font-size: 1.25rem; }
footer .brand-word .big { font-size: 1.5rem; }
footer .brand-word .small { font-size: 1rem; }

nav.primary-nav ul { list-style: none; display: flex; gap: var(--space-md); margin: 0; padding: 0; }
nav.primary-nav a {
  color: var(--color-text-on-ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
nav.primary-nav a:hover,
nav.primary-nav a[aria-current="page"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* -- Hero -- */
.hero {
  position: relative;
  color: var(--color-text-on-ink);
  background: var(--color-ink);
  overflow: hidden;
  min-height: 78vh;
  display: flex;
  align-items: flex-end;
}
.hero-media {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: grayscale(55%) contrast(1.05) brightness(0.55);
}
.hero-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(28,28,26,0.35) 0%, rgba(28,28,26,0.55) 55%, rgba(28,28,26,0.94) 100%);
}
.hero-content {
  position: relative;
  padding: var(--space-xl) 0 var(--space-lg);
  max-width: 780px;
}
.hero-content p.lede { font-size: 1.15rem; color: var(--color-accent-soft); max-width: 54ch; }

/* -- Seal / signature element --
   Recurring hexagon "qualification stamp" motif, echoing the brand mark
   and the "every OEM is vetted" through-line of the copy. */
.seal {
  --seal-size: 132px;
  width: var(--seal-size); height: var(--seal-size);
  position: relative;
  flex-shrink: 0;
}
.seal svg { width: 100%; height: 100%; }
.seal-ring-text {
  font-family: var(--font-display);
  font-size: 9.4px;
  letter-spacing: 3px;
  fill: var(--color-accent);
}

/* -- Sections -- */
section.band { padding: var(--space-xl) 0; }
section.band.alt { background: var(--color-paper-alt); }
section.band.ink { background: var(--color-ink); color: var(--color-text-on-ink); }
section.band.ink h2 { color: var(--color-text-on-ink); }
section.band.ink p { color: var(--color-text-on-ink); opacity: 0.88; }

.section-head { max-width: 640px; margin-bottom: var(--space-lg); }

.grid-2 { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-lg); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
@media (max-width: 860px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  padding: var(--space-md);
}
.card h3 { margin-bottom: 0.6rem; }
.card img { margin-bottom: var(--space-sm); }

.figure { border: 1px solid var(--color-line); }
.figure img { width: 100%; height: auto; }
.figure.uniform img { height: 240px; object-fit: cover; }
.figure figcaption {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding: 0.6rem 0.9rem;
  border-top: 1px solid var(--color-line);
}
.partner-logo { max-width: 200px; margin: 0 auto; }
.tagline-gold { color: var(--color-accent) !important; font-weight: 600; }

.divider { height: 1px; background: var(--color-line); border: 0; margin: var(--space-lg) 0; }
section.band.ink .divider { background: var(--color-line-on-ink); }

.btn {
  display: inline-block;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--color-accent); color: var(--color-ink); }
.btn.solid { background: var(--color-accent); color: var(--color-ink); }
.btn.solid:hover { background: var(--color-accent-soft); }

/* -- Capability icons (custom line-icon set, not stock photography —
   see build notes) -- */
.icon-tile {
  display: flex; gap: var(--space-sm); align-items: flex-start;
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--color-line);
}
.icon-tile:first-child { border-top: 0; }
.icon-tile svg { width: 40px; height: 40px; flex-shrink: 0; color: var(--color-accent); }
.icon-tile h3 { color: var(--color-ink); font-size: 1.02rem; text-transform: none; letter-spacing: 0; margin-bottom: 0.3rem; }
section.band.ink .icon-tile h3 { color: var(--color-text-on-ink); }
.icon-tile p { margin: 0; font-size: 0.96rem; }

/* -- Stats row -- */
.stat-row { display: flex; flex-wrap: wrap; gap: var(--space-lg); }
.stat { min-width: 140px; }
.stat .num { font-family: var(--font-display); font-size: 2.4rem; color: var(--color-accent); line-height: 1; }
.stat .label { font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; opacity: 0.8; margin-top: 0.4rem; }

/* -- Footer -- */
footer.site-footer {
  background: var(--color-ink);
  color: var(--color-text-on-ink);
  padding: var(--space-lg) 0 var(--space-md);
}
footer.site-footer .container {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-md);
  border-bottom: 1px solid var(--color-line-on-ink);
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-sm);
}
footer .brand img { height: 78px; }
footer .foot-note { font-size: 0.8rem; opacity: 0.6; padding: 0 var(--space-md); }
footer nav ul { list-style: none; display: flex; gap: var(--space-md); padding: 0; margin: 0; }
footer nav a { text-decoration: none; color: var(--color-text-on-ink); font-size: 0.85rem; opacity: 0.85; }
footer nav a:hover { color: var(--color-accent); opacity: 1; }
footer .address-line { font-size: 0.85rem; opacity: 0.75; margin: 0 0 0.6rem; padding: 0 var(--space-md); }

/* -- Contact page -- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.field { margin-bottom: var(--space-sm); }
.field label { display: block; font-family: var(--font-display); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.4rem; color: var(--color-accent); }
.field input, .field textarea {
  width: 100%; padding: 0.75rem; border: 1px solid var(--color-line);
  background: var(--color-paper); font-family: var(--font-body); font-size: 1rem; color: var(--color-text);
}
.placeholder-note {
  font-size: 0.82rem; padding: 0.8rem 1rem; border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft); color: var(--color-ink); margin-bottom: var(--space-md);
}