:root {
  --primary: #0B1B2B;
  --primary-light: #1A3A5A;
  --accent: #C9956B;
  --accent-hover: #B07A50;
  --bg-light: #F8F6F2;
  --bg-white: #FFFFFF;
  --text-dark: #111827;
  --text-muted: #4B5563;
  --text-light: #F9FAFB;
  --shadow: 0 4px 12px rgba(11, 27, 43, 0.08);
  --shadow-hover: 0 8px 24px rgba(11, 27, 43, 0.12);
  --radius: 12px;
  --transition: all 0.3s ease;
  --container: min(1200px, 90%);
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }

/* Header */
header {
  background: var(--bg-white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  max-width: var(--container);
  margin: 0 auto;
}
.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}
.logo span { color: var(--accent); }
nav ul { display: flex; gap: 1.5rem; }
nav a {
  font-weight: 500;
  color: var(--primary-light);
  position: relative;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}
nav a:hover::after, nav a.active::after { width: 100%; }

.hamburger { display: none; cursor: pointer; font-size: 1.5rem; }

/* Hero & Sections */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--text-light);
  padding: 6rem 1rem;
  text-align: center;
}
.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 1rem;
  line-height: 1.2;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.9;
}
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-primary { background: var(--accent); color: var(--text-light); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); }
.btn-outline { border: 2px solid var(--accent); color: var(--accent); background: transparent; }
.btn-outline:hover { background: var(--accent); color: var(--text-light); }

.section { padding: 5rem 1rem; max-width: var(--container); margin: 0 auto; }
.section-title {
  text-align: center;
  margin-bottom: 3rem;
}
.section-title h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.section-title p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }

/* Grids & Cards */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.card {
  background: var(--bg-white);
  padding: 1.8rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card h3 { color: var(--primary); margin-bottom: 0.8rem; font-family: var(--font-heading); }
.card p { color: var(--text-muted); font-size: 0.95rem; }

/* CLEAR Model */
.clear-model { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.5rem; margin-top: 2rem; }
.clear-step {
  flex: 1 1 200px;
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-white);
  border-radius: var(--radius);
  border-top: 4px solid var(--accent);
}
.clear-step .letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: var(--text-light);
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 1rem;
}

/* Footer */
footer {
  background: var(--primary);
  color: var(--text-light);
  padding: 4rem 1rem 2rem;
  margin-top: 4rem;
}
.footer-container {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.footer-col h4 { color: var(--accent); margin-bottom: 1rem; font-family: var(--font-heading); }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col a:hover { color: var(--accent); }
.copyright {
  text-align: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
  nav ul {
    position: fixed;
    top: 0; right: -100%;
    height: 100vh; width: 70%;
    background: var(--bg-white);
    flex-direction: column;
    padding: 5rem 2rem;
    box-shadow: -4px 0 12px rgba(0,0,0,0.1);
    transition: var(--transition);
  }
  nav ul.show { right: 0; }
  .hamburger { display: block; }
  .hero { padding: 4rem 1rem; }
}

/* Animations */
.fade-up { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }