/* ===== VARIABLES ===== */
:root {
  --primary: #1a365d;
  --primary-dark: #0f2444;
  --secondary: #f6ad55;
  --secondary-dark: #dd8a35;
  --accent: #ed8936;
  --text: #2d3748;
  --text-light: #718096;
  --white: #ffffff;
  --gray-50: #f7fafc;
  --gray-100: #edf2f7;
  --gray-200: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--white);
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
}

.section-title {
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--secondary);
  color: var(--primary-dark);
}

.btn-primary:hover {
  background: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

.btn-white:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
}

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

.header.scrolled {
  background: var(--white);
  box-shadow: var(--shadow);
}

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

.header.scrolled .nav-link:hover {
  color: var(--secondary);
}

.header.scrolled .logo-white {
  display: none;
}

.header.scrolled .logo-color {
  display: block;
}

.top-bar {
  background: var(--primary-dark);
  padding: 8px 0;
  font-size: 0.875rem;
}

.top-bar-content {
  display: flex;
  justify-content: flex-end;
  gap: 24px;
  color: var(--white);
}

.top-bar a {
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 6px;
}

.top-bar a:hover {
  color: var(--secondary);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  height: 50px;
}

.logo-color {
  display: none;
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--white);
  font-weight: 500;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta {
  display: none;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.mobile-toggle span {
  width: 25px;
  height: 3px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.header.scrolled .mobile-toggle span {
  background: var(--primary);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, rgba(26, 54, 93, 0.85) 0%, rgba(15, 36, 68, 0.8) 100%),
              url('../images/steelworkers-1029665_12801.jpg') center/cover no-repeat;
  padding: 120px 0 80px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text {
  color: var(--white);
}

.hero-badge {
  display: inline-block;
  background: rgba(246, 173, 85, 0.2);
  color: var(--secondary);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-text h1 {
  color: var(--white);
  margin-bottom: 24px;
}

.hero-text p {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item h3 {
  color: var(--secondary);
  font-size: 2.5rem;
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.9rem;
  opacity: 0.8;
  margin: 0;
}

/* ===== HERO FORM ===== */
.hero-form-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-xl);
}

.hero-form-card h3 {
  text-align: center;
  margin-bottom: 8px;
}

.hero-form-card > p {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--secondary);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.form-checkbox input {
  width: auto;
  margin-top: 3px;
}

.form-submit {
  width: 100%;
  margin-top: 16px;
}

/* ===== SERVICES ===== */
.services {
  padding: 100px 0;
  background: var(--gray-50);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--secondary);
  transform: scaleX(0);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 2rem;
}

.service-card h4 {
  margin-bottom: 16px;
}

.service-card p {
  color: var(--text-light);
  margin-bottom: 0;
}

/* ===== ABOUT ===== */
.about {
  padding: 100px 0;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-images {
  position: relative;
}

.about-img-main {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.about-img-secondary {
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 200px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-xl);
  border: 4px solid var(--white);
}

.about-badge {
  position: absolute;
  top: 20px;
  left: -20px;
  background: var(--secondary);
  color: var(--primary-dark);
  padding: 20px;
  border-radius: var(--radius);
  text-align: center;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
}

.about-badge span {
  display: block;
  font-size: 2rem;
}

.about-text h2 {
  margin-bottom: 24px;
}

.about-text > p {
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.feature-icon {
  width: 24px;
  height: 24px;
  background: var(--secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-item h5 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin: 0;
}

/* ===== GALLERY ===== */
.gallery {
  padding: 100px 0;
  background: var(--gray-50);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 36, 68, 0.9) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 24px;
  opacity: 0;
  transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay h4 {
  color: var(--white);
  font-size: 1.1rem;
}

.gallery-overlay p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  margin: 0;
}

/* ===== PARTNERS ===== */
.partners {
  padding: 80px 0;
  background: var(--white);
}

.partners h2 {
  text-align: center;
  margin-bottom: 48px;
}

.partners-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 40px 60px;
}

.partner-logo {
  height: 50px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: var(--transition);
}

.partner-logo:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* ===== CTA ===== */
.cta {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
}

.cta h2 {
  color: var(--white);
  margin-bottom: 16px;
}

.cta p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--primary-dark);
  color: var(--white);
  padding: 80px 0 0;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--secondary);
  transform: translateY(-3px);
}

.footer-column h4 {
  color: var(--white);
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.footer-column ul li {
  margin-bottom: 12px;
}

.footer-column a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-column a:hover {
  color: var(--secondary);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* ===== SERVICE PAGES ===== */
.page-hero {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(15, 36, 68, 0.9) 100%),
              url('../images/IMG-20221110-WA0003.jpg') center/cover no-repeat;
  text-align: center;
  color: var(--white);
}

.page-hero-cubiertas {
  background: linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(15, 36, 68, 0.9) 100%),
              url('../images/italy-sardinia-bosa-roof.jpg') center/cover no-repeat;
}

.page-hero-sate {
  background: linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(15, 36, 68, 0.9) 100%),
              url('../images/02_INDAFER_Vivienda_en_Algete-1060x596-1.jpg') center/cover no-repeat;
}

.page-hero h1 {
  color: var(--white);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

.service-detail {
  padding: 80px 0;
}

.service-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.service-intro-text h2 {
  margin-bottom: 24px;
}

.service-intro-text p {
  color: var(--text-light);
  font-size: 1.1rem;
  line-height: 1.8;
}

.service-intro-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  height: auto;
}

.service-features {
  margin-bottom: 80px;
}

.service-features h3 {
  text-align: center;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--secondary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-card-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.feature-card-icon svg {
  fill: white;
}

.feature-card h4 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin: 0;
}

.service-gallery {
  margin-bottom: 40px;
}

.service-gallery h3 {
  text-align: center;
  margin-bottom: 48px;
}

/* SATE Benefits */
.sate-benefits {
  background: var(--gray-50);
  padding: 60px;
  border-radius: var(--radius-lg);
  margin-bottom: 80px;
}

.sate-benefits h3 {
  text-align: center;
  margin-bottom: 48px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
}

.benefit-card {
  text-align: center;
}

.benefit-icon {
  margin-bottom: 20px;
}

.benefit-card h4 {
  margin-bottom: 12px;
  color: var(--primary-dark);
}

.benefit-card p {
  color: var(--text-light);
  margin: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-form-card {
    max-width: 500px;
    margin: 0 auto;
  }

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

  .about-images {
    max-width: 500px;
    margin: 0 auto;
  }

  .service-intro {
    grid-template-columns: 1fr;
  }

  .service-intro-image {
    order: -1;
  }

  .sate-benefits {
    padding: 40px 20px;
  }

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

@media (max-width: 768px) {
  .top-bar {
    display: none;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--primary-dark);
    flex-direction: column;
    padding: 80px 30px 30px;
    gap: 20px;
    transition: var(--transition);
  }

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

  .nav-link {
    color: var(--white);
    font-size: 1.1rem;
  }

  .mobile-toggle {
    display: flex;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .features-list {
    grid-template-columns: 1fr;
  }

  .about-img-secondary {
    width: 150px;
    right: 10px;
    bottom: -20px;
  }

  .about-badge {
    left: 10px;
    padding: 15px;
  }

  .about-badge span {
    font-size: 1.5rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }

  .footer-contact li {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 100px 0 60px;
  }

  .hero-form-card {
    padding: 30px 20px;
  }

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

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

  .partners-grid {
    gap: 30px;
  }

  .partner-logo {
    height: 40px;
  }
}