/* ========== CUSTOM PROPERTIES ========== */
:root {
  --primary: #004259;
  --accent: #21B5CB;
  --accent-dark: #1a9bb0;
  --blue: #479FD8;
  --light-blue: #A6DEEF;
  --pale-blue: #93C1E7;
  --bg: #F0F7FA;
  --card-bg: #FFFFFF;
  --text: #1a3a4a;
  --text-light: #5a7a8a;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0,66,89,0.08);
  --shadow-hover: 0 8px 30px rgba(0,66,89,0.14);
  --transition: 0.3s ease;
  --max-width: 1200px;
  --header-h: 72px;
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; font-size: inherit; }

/* ========== ACCESSIBILITY ========== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius);
  z-index: 9999;
  font-weight: 600;
}
.skip-link:focus { top: 16px; }

/* ========== LAYOUT ========== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== HEADER ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 1000;
  transition: all var(--transition);
  background: transparent;
}
.header.scrolled {
  background: rgba(0,66,89,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,66,89,0.25);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: #fff;
  text-decoration: none;
}
.logo-mark {
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #fff;
}
.logo-subtitle {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.5px;
  color: var(--light-blue);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  font-size: 15px;
  transition: color var(--transition);
}
.nav-links a:hover { color: #fff; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========== FOOTER ========== */
.footer {
  background: var(--primary);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .site-logo {
  margin-bottom: 16px;
}
.footer-brand .logo-title {
  font-size: 18px;
}
.footer-brand .logo-subtitle {
  font-size: 9px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  max-width: 280px;
}
.footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul a {
  font-size: 14px;
  transition: color var(--transition);
}
.footer ul a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
}
.footer-bottom a { transition: color var(--transition); }
.footer-bottom a:hover { color: var(--accent); }

/* ========== WHATSAPP FLOATING ========== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  z-index: 999;
  transition: all var(--transition);
  animation: pulse-wa 2s infinite;
}
.whatsapp-float:hover { transform: scale(1.1); box-shadow: 0 6px 24px rgba(37,211,102,0.5); }
.whatsapp-float svg { width: 30px; height: 30px; }
@keyframes pulse-wa {
  0%, 100% { box-shadow: 0 4px 20px rgba(37,211,102,0.4); }
  50% { box-shadow: 0 4px 30px rgba(37,211,102,0.6); }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    padding: 100px 32px 32px;
    gap: 24px;
    transition: right var(--transition);
    box-shadow: -4px 0 20px rgba(0,66,89,0.4);
  }
  .nav-links.open { right: 0; }
  .nav-links a { font-size: 18px; color: #fff; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}