:root {
  --navy: #1A2670;
  --navy-mid: #2A3A8C;
  --sky: #5BC8E8;
  --sky-dark: #3AACCF;
  --ivory: #F4FAFD;
  --ivory-2: #EBF5F9;
  --sand: #E3F5FB;
  --charcoal: #1c1c2e;
  --text: #2d3748;
  --text-light: #718096;
  --white: #ffffff;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Jost', sans-serif;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(26,38,112,0.10);
  --shadow-lg: 0 12px 48px rgba(26,38,112,0.15);
  --transition: 0.35s cubic-bezier(0.4,0,0.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; overflow-x: hidden; }
body { font-family: var(--font-body); color: var(--text); background: var(--white); line-height: 1.6; overflow-x: hidden; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.section { padding: 100px 0; }
.section-label { font-size: 11px; font-weight: 600; letter-spacing: 4px; text-transform: uppercase; color: var(--sky-dark); margin-bottom: 16px; }
.section-title { font-family: var(--font-display); font-size: clamp(32px,4vw,52px); font-weight: 600; line-height: 1.15; color: var(--navy); margin-bottom: 20px; }
.section-title em { font-style: italic; color: var(--sky-dark); }
.section-body { font-size: 16px; font-weight: 300; color: var(--text-light); max-width: 520px; line-height: 1.8; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px; font-family: var(--font-body); font-size: 13px; font-weight: 500; letter-spacing: 2px; text-transform: uppercase; border: none; cursor: pointer; transition: var(--transition); border-radius: 2px; }
.btn-primary { background: var(--navy); color: var(--white); }
.btn-primary:hover { background: var(--navy-mid); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline { background: transparent; color: var(--navy); border: 1.5px solid var(--navy); }
.btn-outline:hover { background: var(--navy); color: var(--white); }
.btn-sky { background: var(--sky); color: var(--white); }
.btn-sky:hover { background: var(--sky-dark); transform: translateY(-2px); }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

/* HEADER */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.97); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(91,200,232,0.15); transition: box-shadow 0.3s; }
.header.scrolled { box-shadow: 0 2px 20px rgba(26,38,112,0.12); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; padding: 0 40px; max-width: 1300px; margin: 0 auto; gap: 12px; }
.logo { display: flex; align-items: center; gap: 12px; cursor: pointer; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-casa { font-family: var(--font-display); font-size: 20px; font-weight: 700; color: var(--navy); letter-spacing: 3px; }
.logo-zekri { font-family: var(--font-display); font-size: 20px; font-weight: 700; color: var(--sky); letter-spacing: 2px; }
.logo-tagline { font-size: 8px; letter-spacing: 3px; color: var(--sky-dark); text-transform: uppercase; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a { font-size: 13px; font-weight: 500; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text); transition: color 0.25s; position: relative; padding-bottom: 4px; }
.nav-links a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 1.5px; background: var(--sky); transition: width 0.3s; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active, .nav-links a:hover { color: var(--navy); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; border: none; background: transparent; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--navy); transition: var(--transition); }
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
.mobile-menu { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--white); border-bottom: 2px solid var(--sky); padding: 24px 40px 32px; z-index: 999; box-shadow: var(--shadow-lg); }
.mobile-menu.open { display: block; animation: fadeInUp 0.3s ease; }
.mobile-menu a { display: block; padding: 14px 0; font-size: 15px; font-weight: 500; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text); border-bottom: 1px solid var(--ivory-2); }

/* PAGE HERO BANNER */
.page-hero { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%); padding: 140px 0 80px; text-align: center; position: relative; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% 50%, rgba(91,200,232,0.12) 0%, transparent 70%); }
.page-hero .section-label { color: var(--sky); position: relative; z-index: 2; }
.page-hero h1 { font-family: var(--font-display); font-size: clamp(36px,5vw,64px); font-weight: 600; color: var(--white); line-height: 1.1; position: relative; z-index: 2; margin-bottom: 16px; }
.page-hero h1 em { font-style: italic; color: var(--sky); }
.page-hero p { font-size: 16px; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto; position: relative; z-index: 2; }

/* CTA BAND */
.cta-band { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%); padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-band::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% 50%, rgba(91,200,232,0.12) 0%, transparent 70%); }
.cta-band .section-label { color: var(--sky); display: block; }
.cta-band .section-title { color: var(--white); text-align: center; }
.cta-band .section-body { color: rgba(255,255,255,0.7); margin: 0 auto 36px; text-align: center; }
.cta-band-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }

/* FOOTER */
.footer { background: var(--charcoal); color: rgba(255,255,255,0.75); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 60px; padding-bottom: 60px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-top: 20px; color: rgba(255,255,255,0.5); }
.footer-col h4 { font-size: 12px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; color: var(--sky); margin-bottom: 24px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.6); transition: color 0.25s; }
.footer-col ul li a:hover { color: var(--sky); }
.footer-contact-item { display: flex; gap: 12px; margin-bottom: 16px; font-size: 14px; color: rgba(255,255,255,0.6); }
.footer-contact-item strong { color: rgba(255,255,255,0.9); display: block; margin-bottom: 2px; }
.footer-contact-icon { font-size: 18px; flex-shrink: 0; margin-top: 2px; }
.footer-bottom { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }
.social-links { display: flex; gap: 12px; }
.social-link { width: 36px; height: 36px; border: 1px solid rgba(255,255,255,0.15); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.social-link:hover { border-color: var(--sky); color: var(--sky); }
/* RESPONSIVE */
@media (max-width: 768px) {
  .nav-links, .nav-right { display: none; }
  .hamburger { display: flex; }
  .container { padding: 0 20px; }
  .section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}