/* PICC — Proyectos Integrales de Construcción y Consultoría
   Identidad: #001E87 (navy cobalt) + #00B4D8 (cyan) — arquitectura/precisión
   Mobile-first, sin dependencias externas. */

:root {
  --navy: #001E87;
  --navy-dark: #001257;
  --cyan: #00B4D8;
  --cyan-soft: #E5F7FB;
  --ink: #1A2233;
  --gray: #5A6478;
  --line: #D8DEE9;
  --bg: #FFFFFF;
  --bg-alt: #F5F7FA;
  --max: 1100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

a { color: var(--navy); }

img { max-width: 100%; height: auto; }

/* ---------- Header / Nav ---------- */
.site-header {
  background: var(--navy);
  color: #fff;
  border-bottom: 4px solid var(--cyan);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
  gap: 0.75rem;
}
.brand { display: flex; flex-direction: column; text-decoration: none; color: #fff; }
.brand-mark { font-size: 1.6rem; font-weight: bold; letter-spacing: 0.18em; }
.brand-sub { font-size: 0.62rem; letter-spacing: 0.08em; color: #B9C4E8; text-transform: uppercase; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem; }
.site-nav a {
  color: #E8ECF8;
  text-decoration: none;
  font-size: 0.88rem;
  padding: 0.45rem 0.7rem;
  border-radius: 3px;
}
.site-nav a:hover { background: rgba(255,255,255,0.12); color: #fff; }
.site-nav a[aria-current="page"] { background: var(--cyan); color: var(--navy-dark); font-weight: bold; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 60%, #0A34B8 100%);
  color: #fff;
  padding: 3.5rem 0 3rem;
}
.hero h1 { font-size: 1.8rem; line-height: 1.25; max-width: 21ch; }
.hero .accent { color: var(--cyan); }
.hero p.lead { margin: 1.1rem 0 1.6rem; max-width: 58ch; color: #D4DCF5; font-size: 1.05rem; }
.hero-kicker {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--cyan);
  padding: 0.25rem 0.7rem;
  border-radius: 2px;
  margin-bottom: 1.1rem;
}

/* Page hero (interior) */
.page-hero { background: var(--navy); color: #fff; padding: 2.4rem 0 2.1rem; border-bottom: 4px solid var(--cyan); }
.page-hero h1 { font-size: 1.6rem; }
.page-hero p { color: #C9D3F0; max-width: 62ch; margin-top: 0.5rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 3px;
  font-weight: bold;
  font-size: 0.95rem;
}
.btn-primary { background: var(--cyan); color: var(--navy-dark); }
.btn-primary:hover { background: #33C5E2; }
.btn-outline { border: 2px solid var(--cyan); color: var(--cyan); margin-left: 0.5rem; }
.btn-outline:hover { background: rgba(0,180,216,0.12); }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-dark); }

/* ---------- Sections ---------- */
section { padding: 2.8rem 0; }
.section-alt { background: var(--bg-alt); }
h2 { color: var(--navy); font-size: 1.4rem; margin-bottom: 1rem; }
h3 { color: var(--navy); font-size: 1.05rem; margin-bottom: 0.4rem; }
.section-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: bold;
  display: block;
  margin-bottom: 0.3rem;
}
p + p { margin-top: 0.8rem; }

/* ---------- Cards / Grids ---------- */
.grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; margin-top: 1.5rem; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  border-radius: 4px;
  padding: 1.4rem;
}
.card p { color: var(--gray); font-size: 0.94rem; }
.card ul { margin: 0.6rem 0 0 1.1rem; color: var(--gray); font-size: 0.92rem; }
.card-tag {
  display: inline-block;
  background: var(--cyan-soft);
  color: var(--navy);
  font-size: 0.72rem;
  font-weight: bold;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  margin-bottom: 0.6rem;
}

/* Unit doors (index institucional) */
.card.door { border-top-width: 5px; }
.card.door h3 { font-size: 1.2rem; }
.card.door h3 a { text-decoration: none; }
.card.door h3 a:hover { text-decoration: underline; }

/* Page-hero kicker reuse */
.page-hero .hero-kicker { margin-bottom: 0.8rem; }

/* Project cards */
.project-meta { font-size: 0.85rem; color: var(--gray); margin-top: 0.7rem; border-top: 1px solid var(--line); padding-top: 0.7rem; }
.project-meta strong { color: var(--ink); }

/* ---------- Article / Library ---------- */
article.tech-article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.8rem;
  margin-top: 1.5rem;
}
article.tech-article h2 { font-size: 1.25rem; }
article.tech-article h3 { margin-top: 1.2rem; }
article.tech-article p { margin-top: 0.8rem; color: #2A3348; }
article.tech-article ol, article.tech-article ul { margin: 0.8rem 0 0 1.3rem; color: #2A3348; }
article.tech-article li { margin-top: 0.4rem; }
.article-meta { font-size: 0.8rem; color: var(--gray); text-transform: uppercase; letter-spacing: 0.08em; }
.toc { background: var(--cyan-soft); border-radius: 4px; padding: 1.2rem 1.4rem; margin-top: 1.5rem; }
.toc ul { margin-left: 1.1rem; }
.toc a { font-size: 0.95rem; }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; margin-top: 1rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { border: 1px solid var(--line); padding: 0.55rem 0.75rem; text-align: left; }
th { background: var(--navy); color: #fff; }
tr:nth-child(even) td { background: var(--bg-alt); }

/* ---------- Contact / Forms ---------- */
form { margin-top: 1.2rem; max-width: 560px; }
label { display: block; font-weight: bold; font-size: 0.9rem; margin-top: 1rem; color: var(--navy); }
input, textarea, select {
  width: 100%;
  padding: 0.65rem;
  margin-top: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  font: inherit;
  background: #fff;
}
input:focus, textarea:focus { outline: 2px solid var(--cyan); border-color: var(--cyan); }
form .btn { margin-top: 1.3rem; border: 0; cursor: pointer; }
.contact-block { background: var(--cyan-soft); border-left: 4px solid var(--cyan); padding: 1.2rem 1.4rem; border-radius: 0 4px 4px 0; margin-top: 1.2rem; }
.contact-block p { margin-top: 0.4rem; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--navy); color: #fff; text-align: center; padding: 3rem 0; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #C9D3F0; max-width: 55ch; margin: 0.6rem auto 1.4rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-dark); color: #AAB6DD; font-size: 0.85rem; padding: 2.2rem 0 1.6rem; }
.site-footer .wrap { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
.site-footer h4 { color: #fff; font-size: 0.9rem; margin-bottom: 0.5rem; letter-spacing: 0.06em; }
.site-footer a { color: #C9D3F0; text-decoration: none; }
.site-footer a:hover { color: var(--cyan); }
.site-footer ul { list-style: none; }
.site-footer li { margin-top: 0.3rem; }
.footer-legal { border-top: 1px solid rgba(255,255,255,0.15); margin-top: 1.6rem; padding-top: 1.2rem; text-align: center; color: #7A87B5; }

/* ---------- Utility ---------- */
.muted { color: var(--gray); }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }

/* ---------- Breakpoints ---------- */
@media (min-width: 640px) {
  .hero h1 { font-size: 2.3rem; }
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .site-footer .wrap { grid-template-columns: 2fr 1fr 1fr; }
}
@media (min-width: 960px) {
  .hero h1 { font-size: 2.6rem; }
  .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
  .hero { padding: 4.5rem 0 4rem; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .site-nav, .cta-band, .site-footer, .btn { display: none; }
  body { font-size: 11pt; color: #000; }
  a { color: #000; text-decoration: none; }
}