/* ============================================================
   MC Comunicación · estilos
   ============================================================ */

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

:root {
  --azul: #1E2A78;
  --azul-oscuro: #162060;
  --verde: #C8D26C;
  --crema: #F0EEE9;
  --crema-oscuro: #ECEAE4;
  --gris: #6B6B6B;
  --negro: #111111;
  --blanco: #FFFFFF;
  --footer-bg: #0D1117;

  --pad-x: 48px;
  --max-w: 1280px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--crema);
  color: var(--negro);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

h1, h2, h3,
.nav-logo, .servicio-nombre, .proyecto-nombre,
.sobre-titulo, .contacto-titulo, .proyectos-titulo, .servicios-titulo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--azul); color: var(--blanco);
  padding: 12px 20px; z-index: 200; border-radius: 0 0 8px 0;
  font-size: 14px;
}
.skip-link:focus { left: 0; }

/* ============ NAV ============ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px var(--pad-x);
  background: rgba(240, 238, 233, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.nav-logo { display: inline-flex; align-items: center; text-decoration: none; }
.nav-logo img { height: 28px; width: auto; }

.nav-links { display: flex; gap: 36px; list-style: none; align-items: center; }
.nav-links a {
  text-decoration: none; font-family: 'Inter', sans-serif;
  font-size: 14px; color: var(--negro);
  font-weight: 400; transition: color 0.2s;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--azul); }

.nav-toggle {
  display: none;
  background: transparent; border: 0; padding: 8px;
  cursor: pointer; flex-direction: column; gap: 5px;
}
.nav-toggle span {
  width: 24px; height: 2px; background: var(--azul);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ HERO ============ */
#hero {
  padding: 160px var(--pad-x) 100px;
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
}
.hero-accent { width: 32px; height: 3px; background: var(--verde); display: block; margin-bottom: 36px; }
.hero-title {
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--azul);
  margin-bottom: 44px;
}
.hero-title span { color: var(--verde); }
.hero-body {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; max-width: 760px; margin-bottom: 48px;
}
.hero-body p { font-size: 15px; line-height: 1.7; color: var(--gris); }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.btn-primary, .btn-secondary {
  padding: 14px 28px; border-radius: 100px;
  text-decoration: none;
  font-size: 14px; font-weight: 500;
  transition: background 0.2s, transform 0.2s, color 0.2s, border-color 0.2s;
  display: inline-flex; align-items: center; gap: 8px;
  border: 1.5px solid transparent;
}
.btn-primary { background: var(--azul); color: var(--blanco); }
.btn-primary:hover { background: var(--azul-oscuro); transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--azul); border-color: var(--azul); }
.btn-secondary:hover { background: var(--azul); color: var(--blanco); transform: translateY(-2px); }

/* ============ SERVICIOS ============ */
#servicios { padding: 100px var(--pad-x); border-top: 1px solid rgba(0,0,0,0.08); }
.section-label {
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gris); margin-bottom: 48px; font-weight: 500;
}
.servicios-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 80px; align-items: start; }
.servicios-titulo {
  font-size: clamp(36px, 4vw, 52px);
  line-height: 1.1;
  color: var(--azul);
  position: sticky; top: 100px;
}
.servicios-lista { display: flex; flex-direction: column; }
.servicio-item {
  display: grid; grid-template-columns: 48px 180px 1fr;
  align-items: start; gap: 24px;
  padding: 36px 0;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.servicio-num {
  font-size: 11px; color: var(--verde); font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; padding-top: 4px;
}
.servicio-nombre { font-size: 22px; color: var(--azul); }
.servicio-desc { font-size: 14px; line-height: 1.7; color: var(--gris); }

/* ============ PROYECTOS ============ */
#proyectos { padding: 100px var(--pad-x); background: var(--crema-oscuro); }
.proyectos-titulo {
  font-size: clamp(36px, 4vw, 52px);
  color: var(--azul);
  margin-top: 12px; margin-bottom: 48px;
}
.proyectos-lista { display: flex; flex-direction: column; }
.proyecto-item {
  display: grid; grid-template-columns: 48px 1fr 2fr 80px;
  align-items: center; gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid rgba(0,0,0,0.1);
  transition: padding 0.2s;
}
.proyecto-item:hover { padding-left: 8px; }
.proyecto-num { font-size: 12px; color: var(--gris); }
.proyecto-nombre { font-size: 20px; color: var(--azul); }
.proyecto-desc { font-size: 13px; color: var(--gris); line-height: 1.5; }
.proyecto-year { font-size: 13px; color: var(--gris); text-align: right; }

/* ============ SOBRE ============ */
#sobre {
  padding: 100px var(--pad-x);
  display: grid; grid-template-columns: 1fr 1.4fr;
  gap: 80px; align-items: center;
}
.sobre-foto-wrap { display: flex; justify-content: center; }
.sobre-foto {
  width: 100%; max-width: 420px;
  aspect-ratio: 4/5;
  object-fit: cover; object-position: top;
  border-radius: 4px;
}
.sobre-label {
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gris); margin-bottom: 24px; font-weight: 500;
}
.sobre-titulo {
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.1;
  color: var(--azul);
  margin-bottom: 28px;
}
.sobre-texto { font-size: 15px; line-height: 1.75; color: var(--gris); margin-bottom: 16px; }
.sobre-firma { font-size: 13px; color: var(--gris); margin-top: 32px; opacity: 0.7; }

/* ============ CLIENTES ============ */
#clientes {
  padding: 80px var(--pad-x);
  border-top: 1px solid rgba(0,0,0,0.08);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.clientes-logos {
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 56px 72px; margin-top: 48px;
}
.cliente-logo {
  height: 72px; max-width: 220px; object-fit: contain;
  filter: grayscale(100%); opacity: 0.85;
  transition: opacity 0.3s, filter 0.3s;
}
.cliente-logo:hover { opacity: 1; filter: grayscale(0%); }

/* ============ CONTACTO ============ */
#contacto {
  background: var(--azul);
  padding: 100px var(--pad-x);
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: start;
}
.contacto-titulo {
  font-size: clamp(40px, 5vw, 64px);
  color: var(--blanco);
  line-height: 1.05;
  margin-bottom: 16px;
}
.contacto-sub { font-size: 15px; color: rgba(255,255,255,0.55); line-height: 1.6; }
.contacto-info { margin-top: 32px; display: flex; flex-direction: column; gap: 8px; }
.contacto-info a {
  color: rgba(255,255,255,0.75); text-decoration: none;
  font-size: 14px; transition: color 0.2s;
}
.contacto-info a:hover { color: var(--verde); }

.contacto-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: flex; flex-direction: column; }
.form-label {
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(255,255,255,0.45); margin-bottom: 6px; font-weight: 500;
}
.form-input {
  width: 100%;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--blanco);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}
.form-input::placeholder { color: rgba(255,255,255,0.25); }
.form-input:focus { border-color: var(--verde); background: rgba(255,255,255,0.10); }
textarea.form-input { resize: vertical; min-height: 120px; }

.form-submit {
  background: var(--verde); color: var(--azul); border: none;
  padding: 16px 32px; border-radius: 100px;
  font-family: 'Inter', sans-serif; font-size: 14px; font-weight: 700;
  cursor: pointer; transition: transform 0.2s, opacity 0.2s;
  margin-top: 8px;
}
.form-submit:hover { transform: translateY(-2px); opacity: 0.92; }
.form-submit:disabled { cursor: wait; opacity: 0.6; transform: none; }

.form-feedback { margin-top: 12px; font-size: 14px; min-height: 20px; }
.form-feedback.success { color: var(--verde); }
.form-feedback.error { color: #ff8a80; }

.hp-field { position: absolute; left: -9999px; visibility: hidden; }

/* ============ FOOTER ============ */
footer {
  background: var(--footer-bg);
  padding: 32px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
.footer-logo { display: inline-flex; align-items: center; }
.footer-logo img { height: 24px; width: auto; opacity: 0.85; }
.footer-copy { font-size: 13px; color: rgba(255,255,255,0.3); }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a {
  font-size: 13px; color: rgba(255,255,255,0.35);
  text-decoration: none; transition: color 0.2s;
}
.footer-links a:hover { color: var(--verde); }

/* ============ ANIMACIONES ============ */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  :root { --pad-x: 32px; }
  .servicios-grid { grid-template-columns: 1fr; gap: 32px; }
  .servicios-titulo { position: static; }
  #sobre { grid-template-columns: 1fr; gap: 48px; }
  #contacto { grid-template-columns: 1fr; gap: 48px; }
  .servicio-item { grid-template-columns: 40px 140px 1fr; }
}

@media (max-width: 768px) {
  :root { --pad-x: 24px; }

  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: var(--crema);
    flex-direction: column; gap: 0;
    padding: 0;
    max-height: 0; overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    border-bottom: 1px solid rgba(0,0,0,0.06);
  }
  .nav-links.open {
    max-height: 320px;
    padding: 16px 24px 24px;
  }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block; padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
  }
  .nav-links li:last-child a { border-bottom: 0; }

  #hero { padding: 120px var(--pad-x) 80px; min-height: auto; }
  .hero-body { grid-template-columns: 1fr; gap: 20px; }
  .hero-buttons { width: 100%; }
  .btn-primary, .btn-secondary { flex: 1; justify-content: center; }

  #servicios, #proyectos, #sobre, #contacto { padding: 72px var(--pad-x); }

  .servicio-item {
    grid-template-columns: 1fr; gap: 8px;
    padding: 24px 0;
  }
  .servicio-nombre { font-size: 20px; }

  .proyecto-item {
    grid-template-columns: 32px 1fr;
    grid-template-rows: auto auto auto;
    gap: 4px 16px;
    padding: 20px 0;
  }
  .proyecto-item:hover { padding-left: 0; }
  .proyecto-num { grid-row: 1; grid-column: 1; }
  .proyecto-nombre { grid-row: 1; grid-column: 2; font-size: 18px; }
  .proyecto-desc { grid-row: 2; grid-column: 1 / -1; }
  .proyecto-year { grid-row: 3; grid-column: 1 / -1; text-align: left; }

  .sobre-foto { max-width: 100%; }

  #clientes { padding: 60px var(--pad-x); }
  .clientes-logos { gap: 36px 44px; justify-content: center; }
  .cliente-logo { height: 52px; }

  footer { flex-direction: column; align-items: flex-start; padding: 28px var(--pad-x); }
}

@media (max-width: 480px) {
  .hero-title { font-size: 44px; }
  .hero-buttons { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; }
}