:root {
  --verde-oscuro: rgb(29,70,82);
  --aguamarina: rgb(200,210,211);
  --turquesa: rgb(22,131,147);
  --text-dark: #1f2937;
}

/* ===============================
   TIPOGRAFÍA Y BASE
=================================*/
body {
  font-family: 'Yu Gothic UI Light', 'Segoe UI', Tahoma, sans-serif;
  color: var(--text-dark);
  margin: 0;
  background: #f7f9f9;
  line-height: 1.6;
}

h1, h2, .brand {
  font-family: 'Montserrat', sans-serif;
  letter-spacing: 0.5px;
}

h1 {
  font-size: 2.6rem;
  font-weight: 700;
}

h2 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 0.5em;
  color: var(--verde-oscuro);
}

p, li, a, button, .btn {
  font-family: 'Yu Gothic UI Light', 'Segoe UI', sans-serif;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* ===============================
   NAVBAR
=================================*/
.nav {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
  transition: background 0.3s ease, box-shadow 0.3s ease, color 0.3s ease;
}

.nav.transparent {
  background: transparent;
  box-shadow: none;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.nav.transparent .brand {
  color: white;
}

.nav.scrolled .brand {
  color: var(--verde-oscuro);
}

.nav-links a {
  margin-left: 18px;
  color: var(--verde-oscuro);
  text-decoration: none;
  transition: color 0.3s ease;
  font-weight: 500;
}

.nav.transparent .nav-links a {
  color: white;
}

.nav-links a:hover {
  color: var(--turquesa);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 1.3rem;
  color: inherit;
}

/* ===============================
   HERO
=================================*/
.hero {
  height: 80vh;
  min-height: 480px;
  background-position: center;
  background-size: cover;
  position: relative;
  display: flex;
  align-items: center;
}

.hero .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(29,70,82,0.6), rgba(22,131,147,0.45));
  backdrop-filter: blur(4px);
}

.hero-content {
  position: relative;
  color: white;
  padding: 40px 20px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero .subtitle {
  opacity: 0.95;
  margin-bottom: 18px;
  font-size: 1.1rem;
}

.hero-buttons .btn {
  margin: 8px;
  letter-spacing: 0.3px;
}

/* ===============================
   BOTONES
=================================*/
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--turquesa);
  color: white;
  border: none;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
  background: rgb(17,110,124);
  transform: translateY(-2px);
}

.btn-outline {
  border: 2px solid rgba(255, 255, 255, 0.85);
  color: white;
  background: transparent;
}

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

.btn-outline-color {
  border: 2px solid var(--turquesa);
  color: var(--turquesa);
  background: transparent;
}

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

/* ===============================
   SECCIONES Y GRIDS
=================================*/
.section {
  padding: 70px 0;
}

.bg-light {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(250, 250, 250, 0.95));
}

.lead {
  color: #374151;
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: center;
}

@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.img-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  filter: brightness(0.95);
}

/* ===============================
   TARJETAS DE SERVICIO
=================================*/
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 700px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: white;
  padding: 22px;
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(16,24,40,0.06);
  transition: transform .18s ease, box-shadow .18s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 36px rgba(16,24,40,0.08);
}

.card h3 {
  margin-top: 0;
  color: var(--verde-oscuro);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
}

/* ===============================
   FORMULARIO DE CONTACTO
=================================*/
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

form {
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--verde-oscuro);
}

input, textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #d0d0d0;
  border-radius: 6px;
  font-family: 'Yu Gothic UI Light', sans-serif;
  font-size: 1rem;
}

.status-msg {
  margin-top: 10px;
  color: var(--verde-oscuro);
  font-weight: 600;
  display: none;
}

/* ============================================
   ANIMACIÓN DEL MENSAJE DE CONFIRMACIÓN
============================================ */
.status-msg {
  margin-top: 10px;
  color: var(--verde-oscuro);
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.status-msg.show {
  display: block;
  opacity: 1;
}

.status-msg.success {
  color: #1a7f5a;
}

.status-msg.error {
  color: #b91c1c;
}

/* Animación de parpadeo suave (fade) */
@keyframes fadeInOut {
  0% { opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { opacity: 0; }
}

/* ===============================
   FOOTER
=================================*/
.footer {
  background: var(--verde-oscuro);
  color: var(--aguamarina);
  padding: 24px 0;
  font-size: 0.95rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 700px) {
  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ===============================
   NAV RESPONSIVE
=================================*/
@media (max-width: 800px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    right: 20px;
    background: white;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(16,24,40,0.08);
  }

  .nav-links.show {
    display: block;
  }

  .nav-toggle {
    display: block;
  }
}

/* ===============================
   MOBILE OPTIMIZATION
=================================*/
@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero {
    height: 65vh;
  }
}