/* ══════════════════════════════════════════
   RCR — Estudio de Agrimensura y Topografía
   ══════════════════════════════════════════ */

:root {
  --color-primary:    #314d59;
  --color-primary-d:  #243a44;
  --color-accent:     #b57f5f;
  --color-accent-d:   #9a6a4d;
  --color-surface:    #e4dad8;
  --color-bg:         #f5f0ee;
  --color-white:      #ffffff;
  --color-text:       #2a2a2a;
  --color-muted:      #6b7280;
  --color-border:     #ddd6d3;
  --color-wa:         #25d366;
  --color-wa-d:       #1da851;

  --font-head: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;

  --radius: 10px;
  --shadow: 0 4px 20px rgba(49,77,89,.10);
  --max-w: 1100px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

/* ── Container ── */
.container {
  width: min(var(--max-w), 100% - 2rem);
  margin-inline: auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .95rem;
  padding: .75rem 1.75rem;
  border-radius: 50px;
  cursor: pointer;
  transition: background .2s, color .2s, transform .15s, box-shadow .2s;
  border: 2px solid transparent;
  min-height: 44px;
}
.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn--primary:hover {
  background: var(--color-accent-d);
  box-shadow: 0 6px 20px rgba(181,127,95,.35);
}

.btn--outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--whatsapp {
  background: var(--color-wa);
  color: var(--color-white);
  font-size: 1.05rem;
  padding: 1rem 2rem;
  box-shadow: 0 6px 24px rgba(37,211,102,.35);
}
.btn--whatsapp:hover {
  background: var(--color-wa-d);
  box-shadow: 0 8px 28px rgba(37,211,102,.45);
}

/* ═══════════════════════════
   NAVBAR
═══════════════════════════ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 10px rgba(49,77,89,.08);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: .65rem;
}
.navbar__brand {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  min-width: 0;
}
.brand-rcr {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.55rem;
  color: var(--color-primary);
  letter-spacing: .04em;
  white-space: nowrap;
}
.brand-sub {
  display: none; /* oculto en mobile */
  font-family: var(--font-head);
  font-size: .75rem;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* Links de escritorio — ocultos en mobile */
.navbar__links {
  display: none;
  align-items: center;
  gap: 1.8rem;
}
.navbar__links a:not(.btn) {
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: color .2s;
}
.navbar__links a:not(.btn):hover { color: var(--color-accent); }

/* Grupo de acciones (toggle + hamburger) */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: .25rem;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 1.2rem;
  padding: .4rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  line-height: 1;
  transition: background .2s, color .2s;
}
.theme-toggle:hover { background: rgba(49,77,89,.08); }

/* Hamburger */
.hamburger {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 1.4rem;
  padding: .4rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  line-height: 1;
  transition: background .2s;
}
.hamburger:hover { background: rgba(49,77,89,.08); }

/* Menú desplegable mobile */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: .5rem 1rem 1rem;
  border-top: 1px solid var(--color-border);
  gap: .25rem;
}
.navbar.is-open .mobile-nav {
  display: flex;
}
.mobile-nav__link {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  padding: .85rem 1rem;
  border-radius: var(--radius);
  transition: background .15s, color .15s;
  display: block;
}
.mobile-nav__link:hover,
.mobile-nav__link:active {
  background: rgba(49,77,89,.06);
  color: var(--color-accent);
}
.mobile-nav__link--cta {
  margin-top: .5rem;
  background: var(--color-accent);
  color: var(--color-white);
  text-align: center;
  border-radius: 50px;
}
.mobile-nav__link--cta:hover,
.mobile-nav__link--cta:active {
  background: var(--color-accent-d);
  color: var(--color-white);
}

/* ── Escritorio: mostrar nav, ocultar hamburger ── */
@media (min-width: 768px) {
  .brand-sub    { display: block; }
  .navbar__links { display: flex; }
  .hamburger    { display: none; }
  .mobile-nav   { display: none !important; }
}

/* ═══════════════════════════
   HERO
═══════════════════════════ */
.hero {
  background: var(--color-surface);
  display: flex;
  align-items: center;
  padding-block: 2.75rem 2.25rem;
}
.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0;
}
.hero__logo {
  width: min(260px, 68vw);
  height: auto;
  margin-bottom: 1.5rem;
}
.hero__title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 5.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: .9rem;
}
.hero__desc {
  font-size: .98rem;
  color: var(--color-muted);
  margin-bottom: 1.75rem;
  max-width: 500px;
  line-height: 1.75;
}

@media (min-width: 768px) {
  .hero { padding-block: 5rem 4rem; }
  .hero__logo { width: min(320px, 72vw); margin-bottom: 2rem; }
  .hero__desc { font-size: 1.05rem; margin-bottom: 2rem; }
}

/* ═══════════════════════════
   SECTIONS
═══════════════════════════ */
.section { padding-block: 2.75rem; }
.section--alt { background: var(--color-white); }
.section--surface { background: var(--color-surface); }

@media (min-width: 768px) {
  .section { padding-block: 5rem; }
}

.section__title {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: .6rem;
}
.section__title--left { text-align: left; }

.section__subtitle {
  text-align: center;
  color: var(--color-muted);
  font-size: 1rem;
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .section__subtitle { margin-bottom: 3rem; }
}

/* ═══════════════════════════
   SERVICIOS
═══════════════════════════ */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 540px) {
  .services-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
  }
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.4rem 1.25rem;
  box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}

@media (min-width: 768px) {
  .service-card { padding: 2rem 1.6rem; }
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(49,77,89,.14);
}
.service-card__icon {
  width: 48px;
  height: 48px;
  background: rgba(49,77,89,.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--color-primary);
}
.service-card__icon svg { width: 26px; height: 26px; }
.service-card__icon i { font-size: 1.5rem; line-height: 1; }
.service-card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: .5rem;
}
.service-card p {
  font-size: .9rem;
  color: var(--color-muted);
  line-height: 1.65;
}
.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-top: 1rem;
}
.tag {
  font-family: var(--font-head);
  font-size: .7rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(49,77,89,.07);
  border: 1px solid rgba(49,77,89,.15);
  border-radius: 50px;
  padding: .18rem .6rem;
  letter-spacing: .02em;
  white-space: nowrap;
}

/* ─── Encabezados de grupo de servicios ─── */
.services-group-header {
  grid-column: 1 / -1;
  margin-top: 1.25rem;
  padding: .65rem 0 .65rem 1.25rem;
  border-left: 4px solid var(--color-accent);
}
.services-group-header:first-child { margin-top: 0; }
.services-group-header h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: .07em;
}
.services-group-header p {
  font-size: .88rem;
  color: var(--color-muted);
  margin-top: .25rem;
}

/* ═══════════════════════════
   DARK MODE
═══════════════════════════ */
[data-theme="dark"] {
  --color-primary:   #8ec5d6;
  --color-primary-d: #0a141a;
  --color-accent:    #c49172;
  --color-accent-d:  #b07e5d;
  --color-surface:   #1b3040;
  --color-bg:        #0e1c26;
  --color-white:     #142d3c;
  --color-text:      #e8ddd8;
  --color-muted:     #8faab5;
  --color-border:    rgba(255,255,255,0.08);
  --shadow:          0 4px 24px rgba(0,0,0,.45);
}
[data-theme="dark"] .service-card {
  background: #1a3347;
  border-color: rgba(255,255,255,0.06);
}
[data-theme="dark"] .service-card__icon {
  background: rgba(142,197,214,.10);
}
[data-theme="dark"] .tag {
  background: rgba(142,197,214,.08);
  border-color: rgba(142,197,214,.18);
}
[data-theme="dark"] .matricula {
  background: rgba(196,145,114,.12);
  border-color: rgba(196,145,114,.28);
}
[data-theme="dark"] .theme-toggle:hover { background: rgba(142,197,214,.10); }
[data-theme="dark"] .hamburger:hover    { background: rgba(142,197,214,.10); }
[data-theme="dark"] .mobile-nav__link:hover {
  background: rgba(142,197,214,.08);
  color: var(--color-accent);
}

/* ═══════════════════════════
   CONTACTO
═══════════════════════════ */
.contacto__inner {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
}
.contacto__datos {
  margin-top: 2rem;
  color: var(--color-muted);
  font-size: .9rem;
  line-height: 1.9;
}
.contacto__datos strong { color: var(--color-primary); }
.sin-cargo {
  margin-top: .9rem;
  font-family: var(--font-head);
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.matricula {
  display: inline-block;
  margin-top: .4rem;
  font-family: var(--font-head);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--color-accent);
  background: rgba(181,127,95,.1);
  border: 1px solid rgba(181,127,95,.3);
  border-radius: 50px;
  padding: .25rem .85rem;
}

/* ═══════════════════════════
   FOOTER
═══════════════════════════ */
.footer {
  background: var(--color-primary-d);
  color: rgba(255,255,255,.55);
  padding-block: 2rem;
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .5rem;
}
.footer__brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .9rem;
  color: rgba(255,255,255,.9);
}
.footer__copy { font-size: .82rem; }

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}