:root {
  --c-text: #1f1f1f;
  --c-muted: #6b6b6b;
  --c-bg: #ffffff;
  --c-bg-alt: #f7f7f7;
  --c-accent: #2e6f9f;
  --c-accent-dark: #1f4f73;
  --c-line: #e5e5e5;
  --c-wa: #25d366;
  --max: 1180px;
  --pad: clamp(1rem, 4vw, 3rem);
  --radius: 4px;
  --font-sans: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Kanit", "Open Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { color: var(--c-accent-dark); text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.section { padding: clamp(3rem, 8vw, 6rem) 0; }
.section--alt { background: var(--c-bg-alt); }
.section--dark { background: #2a2a2a; color: #f5f5f5; }
.section--dark h2, .section--dark h3 { color: #fff; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.site-header__inner {
  max-width: var(--max); margin: 0 auto;
  padding: .8rem var(--pad);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.site-header__brand { display: flex; align-items: center; gap: .7rem; }
.site-header__brand img { width: 44px; height: 44px; border-radius: 50%; }
.site-header__brand span { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: var(--c-text); }
.site-nav { display: flex; gap: 1.4rem; align-items: center; }
.site-nav a { color: var(--c-text); font-size: .95rem; }
.site-nav a:hover { color: var(--c-accent); }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .6rem 1.1rem;
  background: var(--c-accent); color: #fff !important;
  border-radius: var(--radius); font-weight: 600; font-size: .95rem;
  border: none; cursor: pointer;
  transition: background .15s ease;
}
.btn:hover { background: var(--c-accent-dark); text-decoration: none; }
.btn--wa { background: var(--c-wa); }
.btn--wa:hover { background: #1ebe5a; }
.btn--ghost { background: transparent; color: var(--c-accent) !important; border: 1.5px solid var(--c-accent); }

/* Hero */
.hero {
  position: relative; padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 8vw, 6rem);
  text-align: center;
  background:
    linear-gradient(rgba(255,255,255,.85), rgba(255,255,255,.92)),
    url("img/background2.jpg") center/cover no-repeat;
}
.hero__lead { font-size: clamp(1.05rem, 1.8vw, 1.25rem); color: var(--c-muted); max-width: 56ch; margin: 0 auto 1.6rem; }
.hero__outline { margin: 2.5rem auto 0; max-width: 980px; opacity: .8; }

/* Three-up */
.three-up {
  display: grid; gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 2.5rem;
}
.three-up__item { text-align: center; }
.three-up__item img { width: 96px; height: auto; margin: 0 auto 1rem; }

/* Numbered services */
.services-num {
  display: grid; gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 2.5rem;
}
.services-num__item {
  background: #fff; padding: 2rem 1.5rem;
  border: 1px solid var(--c-line); border-radius: var(--radius);
  text-align: left;
}
.services-num__num {
  font-family: var(--font-display); font-size: 3rem; font-weight: 300;
  color: var(--c-accent); line-height: 1; margin-bottom: .4rem;
}
.services-num__item h3 { margin: 0 0 .5rem; }

/* Materials grid */
.materials {
  display: grid; gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 2.5rem;
}
.materials__item {
  position: relative; aspect-ratio: 4/3; overflow: hidden;
  border-radius: var(--radius); background: #000;
}
.materials__item img { width: 100%; height: 100%; object-fit: cover; opacity: .75; transition: opacity .2s, transform .3s; }
.materials__item:hover img { opacity: .9; transform: scale(1.04); }
.materials__item span {
  position: absolute; inset: auto 0 0 0; padding: 1rem;
  font-family: var(--font-display); font-size: 1.4rem; font-weight: 600; color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,.7));
}

/* Bio */
.bio { display: grid; gap: 2.5rem; align-items: center; grid-template-columns: 240px 1fr; }
.bio__photo img { width: 240px; height: 240px; border-radius: 50%; object-fit: cover; }
.bio__matricula {
  display: inline-block; padding: .35rem .75rem;
  background: var(--c-bg-alt); border: 1px solid var(--c-line);
  border-radius: var(--radius); font-size: .85rem; color: var(--c-muted);
  margin-top: .5rem;
}
@media (max-width: 640px) {
  .bio { grid-template-columns: 1fr; text-align: center; }
  .bio__photo img { margin: 0 auto; width: 180px; height: 180px; }
}

/* Contact */
.contact-grid {
  display: grid; gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 2rem;
}
.contact-grid__item h3 { color: var(--c-accent); margin-bottom: .3rem; font-size: 1rem; text-transform: uppercase; letter-spacing: .04em; }
.contact-grid__item p { margin: 0; font-size: 1.1rem; }
.contact-cta { text-align: center; margin-top: 3rem; }

/* Floating WhatsApp */
.wa-float {
  position: fixed; right: 1.2rem; bottom: 1.2rem; z-index: 200;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--c-wa); color: #fff !important;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,.18);
  transition: transform .15s ease;
}
.wa-float:hover { transform: scale(1.06); text-decoration: none; }
.wa-float svg { width: 28px; height: 28px; fill: currentColor; }

/* Footer */
.site-footer {
  padding: 2rem var(--pad);
  background: #1a1a1a; color: #aaa;
  text-align: center; font-size: .9rem;
}
.site-footer a { color: #ddd; }

/* Mobile nav */
@media (max-width: 720px) {
  .site-nav { display: none; }
  .site-nav--mobile-cta { display: flex; }
  .site-nav--mobile-cta a:not(.btn) { display: none; }
}

/* Section eyebrow */
.eyebrow {
  display: block; text-transform: uppercase; letter-spacing: .12em;
  font-size: .8rem; color: var(--c-accent); font-weight: 700;
  margin-bottom: .5rem;
}
.section-title { text-align: center; margin-bottom: .5rem; }
.section-lead { text-align: center; color: var(--c-muted); max-width: 60ch; margin: 0 auto; }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--c-accent); color: #fff; padding: .5rem 1rem; z-index: 999;
}
.skip-link:focus { left: 0; }