/* Smoother cross-page navigation in browsers that support it (Chrome 126+);
   silently ignored elsewhere — zero cost, zero JS. */
@view-transition {
  navigation: auto;
}

:root {
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --line: #e2e8f0;
  --accent: #4f46e5;
  --accent-strong: #4338ca;
  --accent-soft: #eef2ff;
  --navy: #0b1220;
  --navy-soft: #111a2e;
  --radius: 14px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--ink-soft);
  background: var(--bg);
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }

.text-muted-custom { color: var(--muted); }

/* Buttons */
.btn-brand {
  background: var(--accent);
  color: #fff;
  border: none;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  transition: background-color 0.15s ease, transform 0.15s ease;
  display: inline-block;
}
.btn-brand:hover { background: var(--accent-strong); color: #fff; transform: translateY(-1px); }

.btn-brand-outline {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  display: inline-block;
  transition: border-color 0.15s ease;
}
.btn-brand-outline:hover { border-color: var(--accent); color: var(--accent); }

/* Nav */
.site-nav {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.brand-logo {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
}
.brand-logo .dot { color: var(--accent); }
.site-nav .nav-link {
  color: var(--ink-soft);
  font-weight: 500;
  padding: 0.5rem 1rem;
}
.site-nav .nav-link.active,
.site-nav .nav-link:hover { color: var(--accent); }

.nav-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.4rem 0.65rem;
}
.nav-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* Mobile nav drawer */
.nav-drawer { width: 300px; }
.nav-drawer .offcanvas-header { border-bottom: 1px solid var(--line); }
.nav-drawer .nav-link {
  padding: 0.85rem 0.25rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.05rem;
}

/* Hero */
.hero {
  background: var(--bg-soft);
  padding: 5rem 0 4rem;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
}

/* Sections */
.section { padding: 5rem 0; }
.section-navy {
  background: var(--navy);
  color: #cbd5e1;
}
.section-navy h2, .section-navy h3 { color: #fff; }

/* Service / discipline cards */
.service-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

/* Project grid */
.filter-pill {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}
.filter-pill:hover { border-color: var(--accent); color: var(--accent); }
.filter-pill.active { background: var(--ink); color: #fff; border-color: var(--ink); }

.project-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.project-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; background: var(--bg-soft); }
.project-card .card-body { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
.tag-chip {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  margin: 0 0.35rem 0.35rem 0;
}

/* Tech stack badges */
.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
}

/* Process steps */
.process-step { position: relative; padding-left: 3.25rem; height: 100%; }
.process-step-number {
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: "Plus Jakarta Sans", sans-serif;
}

/* Stats band */
.stat-item { text-align: center; }
.stat-value {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}
.stat-label {
  color: #94a3b8;
  font-size: 0.85rem;
  margin-top: 0.35rem;
}

/* Testimonials */
.testimonial-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.testimonial-quote {
  font-size: 1.05rem;
  color: var(--ink-soft);
  flex-grow: 1;
}
.testimonial-avatar {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: "Plus Jakarta Sans", sans-serif;
}

/* FAQ accordion — restyled to match brand instead of Bootstrap defaults */
.faq-accordion .accordion-item {
  border: 1px solid var(--line);
  border-radius: var(--radius) !important;
  margin-bottom: 1rem;
  overflow: hidden;
}
.faq-accordion .accordion-button {
  font-weight: 600;
  color: var(--ink);
  padding: 1.25rem 1.5rem;
}
.faq-accordion .accordion-button:not(.collapsed) {
  background: var(--accent-soft);
  color: var(--accent-strong);
  box-shadow: none;
}
.faq-accordion .accordion-button:focus { box-shadow: none; border-color: var(--line); }
.faq-accordion .accordion-button::after { flex-shrink: 0; }
.faq-accordion .accordion-body { padding: 0 1.5rem 1.25rem; color: var(--muted); }

/* About page */
.bio-photo {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent-soft), #ffffff);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
}

/* Contact form */
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem;
}
.form-control {
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: 0.65rem 0.9rem;
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: #94a3b8;
  padding: 3rem 0 2rem;
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }

/* AI chat widget */
#ai-widget-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 1050;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.85rem 1.4rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
}
#ai-widget-panel {
  position: fixed;
  bottom: 5.5rem;
  right: 1.5rem;
  width: 340px;
  max-width: calc(100vw - 2rem);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  max-height: 420px;
}
#ai-widget-messages { flex: 1; overflow-y: auto; padding: 1rem; max-height: 260px; }
.ai-msg { font-size: 0.9rem; margin-bottom: 0.75rem; line-height: 1.4; }
.ai-msg.user { text-align: right; color: var(--ink); }
.ai-msg.bot { color: var(--ink-soft); }

/* Utility */
.skeleton {
  background: linear-gradient(90deg, var(--bg-soft) 25%, #eef1f5 37%, var(--bg-soft) 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: 8px;
}
@keyframes skeleton-loading {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

/* ---- Animations ---------------------------------------------------------
   Scroll-reveal + hero entrance + micro-interactions. Vanilla CSS/JS only —
   no animation library. Fully disabled for prefers-reduced-motion so motion-
   sensitive visitors just see the final state immediately. */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
  .reveal-delay-1.is-visible { transition-delay: 0.08s; }
  .reveal-delay-2.is-visible { transition-delay: 0.16s; }
  .reveal-delay-3.is-visible { transition-delay: 0.24s; }
  .reveal-delay-4.is-visible { transition-delay: 0.32s; }

  @keyframes hero-fade-up {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .hero-animate { opacity: 0; animation: hero-fade-up 0.7s ease forwards; }
  .hero-animate-1 { animation-delay: 0.05s; }
  .hero-animate-2 { animation-delay: 0.15s; }
  .hero-animate-3 { animation-delay: 0.25s; }
  .hero-animate-4 { animation-delay: 0.35s; }
}

/* Micro-interactions (kept even under reduced-motion — they're instant state
   changes on interaction, not ambient motion) */
.btn-brand, .btn-brand-outline, .filter-pill, .tech-badge {
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.btn-brand:active, .btn-brand-outline:active { transform: scale(0.97); }

.service-card, .project-card, .testimonial-card, .process-step {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tech-badge:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.process-step-number { transition: transform 0.2s ease; }
.process-step:hover .process-step-number { transform: scale(1.1); }