/* ============================================================
   SAYDE - Servicios Ambientales y Desarrollo Ecológico
   styles.css — Fase 2 (Claude Sonnet)
   ============================================================ */

/* === VARIABLES ============================================= */
:root {
  --color-primary:      #4A7C2E;
  --color-primary-dark: #385f22;
  --color-light:        #8BC34A;
  --color-whatsapp:     #25D366;
  --color-whatsapp-dark:#1da851;
  --color-dark:         #1a1a1a;
  --color-text:         #2d2d2d;
  --color-text-light:   #5a5a5a;
  --color-bg-light:     #f5f8f0;
  --color-bg-dark:      #0d1f08;
  --color-white:        #ffffff;
  --color-border:       #dde8d0;

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

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.18);
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --transition: 0.3s ease;

  --container-max: 1200px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* === TIPOGRAFÍA ============================================ */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-dark);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.3rem); }

/* === CONTENEDOR =========================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === SECCIONES (espaciado) ================================ */
section {
  padding: 5rem 0;
}

section h2 {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-primary);
  margin: 0.75rem auto 0;
  border-radius: 2px;
}

/* === PAGE LOADER ========================================= */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1a3a0e 50%, var(--color-primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  text-align: center;
  z-index: 1;
  animation: loaderFadeIn 0.8s ease forwards;
}

@keyframes loaderFadeIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.loader-logo {
  margin-bottom: 2rem;
  animation: loaderPulse 1.8s ease-in-out infinite;
}

.loader-logo img {
  width: 140px;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: 0 0 40px rgba(139, 195, 74, 0.3);
  margin: 0 auto;
}

@keyframes loaderPulse {
  0%, 100% { transform: scale(1); filter: brightness(1); }
  50%      { transform: scale(1.05); filter: brightness(1.15); }
}

.loader-bar {
  width: 200px;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  margin: 0 auto 1.5rem;
  overflow: hidden;
}

.loader-bar-fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-light), var(--color-whatsapp), var(--color-light));
  border-radius: 3px;
  animation: loaderProgress 2s ease-in-out forwards;
}

@keyframes loaderProgress {
  0%   { width: 0; }
  30%  { width: 45%; }
  60%  { width: 70%; }
  100% { width: 100%; }
}

.loader-text {
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: loaderTextIn 1s 0.4s ease forwards;
  opacity: 0;
}

@keyframes loaderTextIn {
  from { opacity: 0; letter-spacing: 0.4em; }
  to   { opacity: 0.7; letter-spacing: 0.15em; }
}

/* Hojas flotantes decorativas */
.loader-leaves {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.leaf {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--color-light);
  border-radius: 0 50% 50% 50%;
  opacity: 0;
  animation: leafFall linear infinite;
}

.leaf-1 { left: 10%; animation-duration: 6s; animation-delay: 0s;   width: 10px; height: 10px; }
.leaf-2 { left: 30%; animation-duration: 8s; animation-delay: 1s;   width: 14px; height: 14px; }
.leaf-3 { left: 55%; animation-duration: 7s; animation-delay: 0.5s; width: 8px;  height: 8px; }
.leaf-4 { left: 75%; animation-duration: 9s; animation-delay: 2s;   width: 12px; height: 12px; }
.leaf-5 { left: 90%; animation-duration: 6.5s; animation-delay: 1.5s; width: 10px; height: 10px; }

@keyframes leafFall {
  0%   { top: -5%; opacity: 0; transform: rotate(0deg) translateX(0); }
  10%  { opacity: 0.4; }
  50%  { opacity: 0.25; }
  100% { top: 105%; opacity: 0; transform: rotate(360deg) translateX(80px); }
}

/* === SKIP LINK (accesibilidad) ============================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* === SCROLL REVEAL ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === HEADER / NAV ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
}

.navbar {
  height: var(--nav-height);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo-container {
  flex-shrink: 0;
}

.logo {
  height: 48px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-menu a {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition);
}

.header.scrolled .nav-menu a {
  color: var(--color-text);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a:focus::after {
  width: 100%;
}

.nav-menu a:hover {
  color: var(--color-light);
}

.header.scrolled .nav-menu a:hover {
  color: var(--color-primary);
}

.cta-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-whatsapp);
  color: var(--color-white) !important;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.cta-whatsapp:hover {
  background: var(--color-whatsapp-dark);
  transform: translateY(-1px);
}

/* Hamburguesa */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
  background: none;
  border: none;
  z-index: 1100;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.header.scrolled .hamburger span,
.hamburger.active span {
  background: var(--color-dark);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* === HERO ================================================= */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero.loaded .hero-image {
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(13, 31, 8, 0.75) 0%,
    rgba(74, 124, 46, 0.45) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  padding: 0 1.5rem;
  max-width: 800px;
}

.hero-content h1 {
  color: var(--color-white);
  margin-bottom: 1rem;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

.hero-slogan {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-weight: 400;
  margin-bottom: 2rem;
  opacity: 0.92;
  text-shadow: 0 1px 6px rgba(0,0,0,0.3);
}

/* === BOTONES ============================================== */
.btn-primary {
  display: inline-block;
  background: var(--color-whatsapp);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 2.2rem;
  border-radius: 50px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
}

.btn-primary:hover {
  background: var(--color-whatsapp-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.5);
}

/* === SERVICIOS ============================================ */
.servicios {
  background: var(--color-bg-light);
}

.servicios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.servicio-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.servicio-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.servicio-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.servicio-card:hover img {
  transform: scale(1.04);
}

.servicio-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.servicio-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 0.75rem;
}

.servicio-content h3 {
  color: var(--color-primary-dark);
  margin-bottom: 0.6rem;
}

.servicio-content p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.65;
}

/* === NOSOTROS ============================================= */
.nosotros {
  background: var(--color-white);
}

.nosotros-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.nosotros-text p {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
  line-height: 1.75;
}

.nosotros-text p:last-child {
  margin-bottom: 0;
}

.nosotros-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  object-fit: cover;
  max-height: 420px;
}

/* === GALERÍA ============================================== */
.galeria {
  background: var(--color-bg-dark);
}

.galeria h2 {
  color: var(--color-white);
}

.galeria h2::after {
  background: var(--color-light);
}

.galeria-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 0.75rem;
}

.galeria-item {
  overflow: hidden;
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
}

.galeria-item:nth-child(1) {
  grid-column: span 2;
  grid-row: span 2;
}

.galeria-item img,
.galeria-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}

.galeria-item video {
  min-height: 200px;
}

.galeria-item:hover img,
.galeria-item:hover video {
  transform: scale(1.06);
}

.galeria-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(74, 124, 46, 0);
  transition: background var(--transition);
  pointer-events: none;
}

.galeria-item:hover::after {
  background: rgba(74, 124, 46, 0.25);
}

/* Ícono de zoom en galería */
.galeria-item .zoom-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  color: white;
  font-size: 2rem;
  z-index: 1;
  transition: transform var(--transition);
  pointer-events: none;
}

.galeria-item:hover .zoom-icon {
  transform: translate(-50%, -50%) scale(1);
}

/* === LIGHTBOX ============================================= */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
}

.lightbox-inner {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  cursor: default;
}

.lightbox-inner img,
.lightbox-inner video {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: block;
}

.lightbox-close {
  position: absolute;
  top: -2rem;
  right: -1rem;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  background: none;
  border: none;
  padding: 0.25rem 0.5rem;
  transition: color var(--transition);
}

.lightbox-close:hover {
  color: var(--color-light);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.15);
  color: white;
  border: none;
  font-size: 1.8rem;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  z-index: 1;
}

.lightbox-nav:hover {
  background: rgba(255,255,255,0.3);
}

.lightbox-prev { left: -3.5rem; }
.lightbox-next { right: -3.5rem; }

/* === TESTIMONIOS ========================================== */
.testimonios {
  background: var(--color-bg-light);
}

.testimonios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.testimonio-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

.testimonio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.testimonios-stars {
  color: #f5c518;
  font-size: 1.2rem;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.testimonio-text {
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-style: italic;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.testimonio-autor {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-primary);
}

/* === CONTACTO ============================================= */
.contacto {
  background: var(--color-white);
}

.contacto-content {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 3rem;
  align-items: start;
}

.info-item {
  margin-bottom: 1.75rem;
}

.info-item h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

.info-item p,
.info-item a {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.5;
  transition: color var(--transition);
}

.info-item a:hover {
  color: var(--color-primary);
}

.contacto-map iframe {
  width: 100%;
  height: 400px;
  border: 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* === FOOTER =============================================== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 2.5rem 0;
}

.footer-content {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  opacity: 0.9;
}

.footer-info {
  flex: 1;
}

.footer-info p {
  font-size: 0.88rem;
  margin-bottom: 0.75rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.85rem;
  font-family: var(--font-heading);
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-light);
}

/* === BOTÓN FLOTANTE WHATSAPP ============================== */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 900;
  width: 60px;
  height: 60px;
  background: var(--color-whatsapp);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: whatsapp-pulse 2.5s infinite;
}

.whatsapp-float svg {
  width: 30px;
  height: 30px;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.65);
  animation: none;
}

@keyframes whatsapp-pulse {
  0%   { box-shadow: 0 0 0 0    rgba(37,211,102,0.5); }
  50%  { box-shadow: 0 0 0 16px rgba(37,211,102,0);   }
  100% { box-shadow: 0 0 0 0    rgba(37,211,102,0);   }
}

/* === RESPONSIVE =========================================== */

/* --- Tablet grande / escritorio pequeño (992px) --- */
@media (max-width: 992px) {
  .nosotros-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contacto-content {
    grid-template-columns: 1fr;
  }

  .galeria-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .galeria-item:nth-child(1) {
    grid-column: span 2;
  }

  .lightbox-prev { left: -2.5rem; }
  .lightbox-next { right: -2.5rem; }
}

/* --- Tablet (768px) --- */
@media (max-width: 768px) {
  :root { --nav-height: 64px; }

  section { padding: 3.5rem 0; }

  /* Hamburguesa activa */
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(80vw, 300px);
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: calc(var(--nav-height) + 1rem) 2rem 2rem;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition);
    z-index: 1050;
    overflow-y: auto;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    color: var(--color-text) !important;
    font-size: 1rem;
    padding: 0.85rem 0;
    display: block;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu a::after {
    display: none;
  }

  .cta-whatsapp {
    display: none;
  }

  /* Overlay para cerrar menú */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1040;
  }

  .nav-overlay.active {
    display: block;
  }

  .galeria-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto;
  }

  .galeria-item:nth-child(1) {
    grid-column: span 2;
    grid-row: span 1;
  }

  .lightbox-prev { left: 0.5rem; }
  .lightbox-next { right: 0.5rem; }

  .lightbox-inner img,
  .lightbox-inner video {
    max-width: 95vw;
  }
}

/* --- Móvil (576px) --- */
@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

  .servicios-grid {
    grid-template-columns: 1fr;
  }

  .testimonios-grid {
    grid-template-columns: 1fr;
  }

  .galeria-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .galeria-item:nth-child(1) {
    grid-column: span 2;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .footer-links {
    gap: 1rem;
  }

  .whatsapp-float {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 54px;
    height: 54px;
  }

  section h2::after {
    width: 40px;
  }

  .contacto-map iframe {
    height: 280px;
  }
}