/* ============================================================
   Traveon Systems Innovation — stylesheet
   ============================================================ */

:root {
  --ink: #0c1526;
  --ink-dim: #4a5568;
  --ink-faint: #8792a6;
  --paper: #ffffff;
  --surface: #f5f6f8;
  --surface-alt: #eef1f5;
  --line: rgba(12, 21, 38, 0.10);
  --line-soft: rgba(12, 21, 38, 0.06);
  --accent: #2537a7;
  --accent-deep: #1a2a7e;
  --accent-soft: #eaecf8;

  --font-display: "Fraunces", "Iowan Old Style", "Georgia", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1180px;
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.14;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
  color: var(--ink);
}

p { margin: 0 0 1em; color: var(--ink-dim); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* very light grain, barely visible — keeps flat colour fields from looking too clean/synthetic */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.02;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------------- Header ---------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 22px 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: padding 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.site-header.scrolled {
  padding: 14px 0;
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(12, 21, 38, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark { flex-shrink: 0; width: 36px; height: 36px; object-fit: contain; }

.brand-word { display: flex; flex-direction: column; line-height: 1.15; }
.brand-word strong {
  font-family: var(--font-display);
  font-size: 16.5px;
  letter-spacing: 0.05em;
  color: var(--ink);
}
.brand-word em {
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: 34px;
  margin: 0 auto;
}

.main-nav a {
  font-size: 14.5px;
  color: var(--ink-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
.main-nav a:hover { color: var(--ink); }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right 0.3s var(--ease);
}
.main-nav a:hover::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: 18px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 9px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  margin: 0 auto;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 8px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}
.btn-primary:hover { background: var(--accent-deep); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-small { padding: 10px 18px; font-size: 13.5px; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  padding: 168px 0 96px;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-soft);
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
  background: var(--accent-soft);
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(2.2rem, 3.6vw, 3.4rem);
  max-width: 14ch;
  margin-bottom: 0.4em;
}

.hero-sub {
  font-size: 17px;
  max-width: 52ch;
  margin-bottom: 2em;
}

.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  max-width: 46ch;
}
.fact { display: flex; flex-direction: column; gap: 6px; }
.fact-label {
  font-size: 11.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.fact-value { font-size: 14.5px; color: var(--ink); font-weight: 500; line-height: 1.45; }

.hero-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 5/4;
  box-shadow: 0 24px 60px -30px rgba(12, 21, 38, 0.35);
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------------- Section shared ---------------- */
section { position: relative; padding: 108px 0; }

.section-label {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  font-weight: 600;
}

.section-head { max-width: 640px; margin-bottom: 60px; }
.section-head h2 { font-size: clamp(1.8rem, 2.8vw, 2.4rem); }
.section-head p { font-size: 16.5px; }

/* ---------------- Capabilities ---------------- */
.capabilities { background: var(--paper); }

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.capability-card {
  background: var(--paper);
  padding: 42px 38px;
  transition: background 0.25s ease;
}
.capability-card:hover { background: var(--surface); }

.card-index {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}

.capability-card h3 {
  font-size: 1.35rem;
  margin-top: 14px;
}

.capability-card p { font-size: 15px; }

.tag-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-list li {
  font-size: 12.5px;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 6px 12px;
  border-radius: 999px;
}

/* ---------------- Approach ---------------- */
.approach { background: var(--surface); }

.approach-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 80px;
  align-items: center;
}

.approach-copy h2 { font-size: clamp(1.8rem, 2.8vw, 2.4rem); }
.approach-copy > p { max-width: 50ch; }

.steps { list-style: none; margin: 44px 0 0; padding: 0; }
.steps li {
  display: flex;
  gap: 22px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.steps li:last-child { border-bottom: 1px solid var(--line); }

.step-num {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 15px;
  padding-top: 3px;
  flex-shrink: 0;
  width: 32px;
}

.steps h3 { font-size: 1.08rem; margin-bottom: 6px; }
.steps p { font-size: 15px; margin-bottom: 0; }

.approach-visual { position: relative; height: 360px; }
.visual-frame {
  position: absolute;
  inset: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 20% 20%, rgba(28,79,160,0.07), transparent 45%),
    radial-gradient(circle at 80% 75%, rgba(28,79,160,0.05), transparent 45%),
    var(--paper);
  overflow: hidden;
}
.visual-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.visual-node {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
}
.n1 { top: 15%; left: 15%; }
.n2 { top: 35%; left: 50%; width: 16px; height: 16px; }
.n3 { top: 70%; left: 37%; }
.n4 { top: 80%; left: 85%; }

/* ---------------- About ---------------- */
.about { background: var(--paper); }

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 70px;
  align-items: center;
}

.about-photo {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4/5;
}
.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lead-line {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--ink);
  line-height: 1.4;
  font-weight: 500;
}

.about-copy p { font-size: 16px; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.stat { display: flex; flex-direction: column; gap: 8px; }
.stat-num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  color: var(--accent);
}
.stat-label { font-size: 13px; color: var(--ink-faint); line-height: 1.45; }

/* ---------------- Contact ---------------- */
.contact { background: var(--surface); }

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
}

.info-block { margin-bottom: 34px; }
.info-label {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.info-block p { font-size: 16px; color: var(--ink); }
.info-block a { color: var(--accent); border-bottom: 1px solid var(--accent-soft); }
.info-block a:hover { color: var(--accent-deep); }

.contact-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
}

.form-row { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
.form-row label {
  font-size: 12.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.form-row input,
.form-row textarea {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14.5px;
  resize: vertical;
  transition: border-color 0.2s ease;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-note { font-size: 12.5px; color: var(--ink-faint); margin: 16px 0 0; }

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--ink);
  padding: 44px 0;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 14px; color: #ffffff; }
.footer-brand img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  background: #ffffff;
  border-radius: 7px;
  padding: 3px;
}
.footer-meta, .footer-copy { font-size: 12.5px; color: rgba(255,255,255,0.55); margin: 0; }
.footer-meta a { color: rgba(255,255,255,0.8); }

/* ---------------- Back to top ---------------- */
.to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s var(--ease);
  z-index: 90;
  box-shadow: 0 10px 30px -12px rgba(12, 21, 38, 0.25);
}
.to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--accent); color: #ffffff; border-color: var(--accent); }

/* ---------------- Reveal animation ---------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].in-view { opacity: 1; transform: translateY(0); }

/* ---------------- Responsive ---------------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-media { order: -1; aspect-ratio: 16/9; }
  .approach-grid { grid-template-columns: 1fr; }
  .approach-visual { height: 260px; order: -1; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { aspect-ratio: 16/9; }
  .contact-grid { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn-small { display: none; }

  .site-header.nav-open .main-nav {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(14px);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 8px 28px 18px;
  }
  .site-header.nav-open .main-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }

  .hero { padding: 136px 0 72px; }
  .hero-facts { grid-template-columns: 1fr; }
  section { padding: 76px 0; }
  .stat-row { grid-template-columns: 1fr; gap: 22px; }
  .contact-form { padding: 26px; }
  .capability-card { padding: 32px 24px; }
}