/* CDA Exam Prep — Global Styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #2563EB;
  --blue-dark: #1D4ED8;
  --blue-light: #EFF6FF;
  --green: #16A34A;
  --green-light: #F0FDF4;
  --amber: #D97706;
  --amber-light: #FFFBEB;
  --red: #DC2626;
  --red-light: #FEF2F2;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --white: #FFFFFF;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --radius: 10px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* NAV */
nav {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky; top: 0; z-index: 100;
  box-shadow: var(--shadow);
}
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 0 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.nav-logo { font-weight: 700; font-size: 1.1rem; color: var(--gray-900); }
.nav-logo span { color: var(--blue); }
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { color: var(--gray-700); font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--blue); text-decoration: none; }
.btn { display: inline-block; padding: 0.5rem 1.2rem; border-radius: 6px; font-weight: 600; font-size: 0.9rem; cursor: pointer; border: none; transition: background 0.15s; }
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-dark); text-decoration: none; color: var(--white); }
.btn-secondary { background: var(--white); color: var(--blue); border: 1.5px solid var(--blue); }
.btn-secondary:hover { background: var(--blue-light); text-decoration: none; }
.btn-lg { padding: 0.8rem 2rem; font-size: 1.05rem; border-radius: 8px; }
.btn-xl { padding: 1rem 2.5rem; font-size: 1.15rem; border-radius: 8px; }

/* HERO */
.hero {
  background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 60%, #3B82F6 100%);
  color: var(--white);
  padding: 5rem 1.5rem 4rem;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  max-width: 700px;
  margin: 0 auto 1rem;
}
.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 550px;
  margin: 0 auto 2.2rem;
}
.hero-stats {
  display: flex; gap: 2rem; justify-content: center; flex-wrap: wrap;
  margin-top: 2.5rem;
}
.hero-stat { text-align: center; }
.hero-stat strong { display: block; font-size: 1.8rem; font-weight: 800; }
.hero-stat span { font-size: 0.85rem; opacity: 0.8; }

/* SECTIONS */
section { padding: 4rem 1.5rem; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-label {
  font-size: 0.8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--blue); margin-bottom: 0.5rem;
}
.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: 0.75rem; }
.section-sub { font-size: 1.05rem; color: var(--gray-500); max-width: 600px; }

/* COMPETENCY GRID */
.competency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.comp-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--blue);
}
.comp-card.c2 { border-color: #7C3AED; }
.comp-card.c3 { border-color: #DB2777; }
.comp-card.c4 { border-color: #D97706; }
.comp-card.c5 { border-color: #059669; }
.comp-card.c6 { border-color: #DC2626; }
.comp-number { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--gray-400); margin-bottom: 0.4rem; }
.comp-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.6rem; }
.comp-areas { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.area-tag {
  background: var(--gray-100); color: var(--gray-700);
  padding: 0.2rem 0.6rem; border-radius: 100px;
  font-size: 0.78rem; font-weight: 500;
}

/* WHY SECTION */
.why-section { background: var(--white); }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.why-card { text-align: center; padding: 1.5rem 1rem; }
.why-icon { font-size: 2.2rem; margin-bottom: 0.8rem; }
.why-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.why-card p { font-size: 0.9rem; color: var(--gray-500); }

/* SAMPLE QUESTION */
.sample-section { background: var(--gray-50); }
.sample-box {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  max-width: 700px;
  margin: 2rem auto 0;
}
.sample-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--blue); margin-bottom: 0.8rem; }
.sample-box p.question-text { font-size: 1.05rem; font-weight: 600; margin-bottom: 1.2rem; line-height: 1.5; }
.sample-options { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.sample-options li {
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: default;
}
.sample-options li.correct { border-color: var(--green); background: var(--green-light); color: #14532D; font-weight: 600; }
.sample-answer { margin-top: 1.2rem; padding: 0.8rem 1rem; background: var(--blue-light); border-radius: 6px; font-size: 0.9rem; color: #1E3A8A; }
.sample-answer strong { display: block; margin-bottom: 0.2rem; }

/* PRICING */
.pricing-section { background: linear-gradient(135deg, #1E3A8A, #2563EB); color: var(--white); text-align: center; }
.pricing-section .section-title { color: var(--white); }
.pricing-section .section-sub { color: rgba(255,255,255,0.85); margin: 0 auto; }
.price-card {
  background: var(--white);
  color: var(--gray-900);
  border-radius: 14px;
  padding: 2.5rem 2rem;
  max-width: 440px;
  margin: 2.5rem auto 0;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.price-tag { font-size: 3.5rem; font-weight: 900; color: var(--blue); }
.price-tag span { font-size: 1.4rem; font-weight: 700; vertical-align: top; margin-top: 0.8rem; display: inline-block; }
.price-desc { color: var(--gray-500); font-size: 0.95rem; margin-bottom: 1.5rem; }
.price-features { list-style: none; text-align: left; margin-bottom: 1.8rem; display: flex; flex-direction: column; gap: 0.7rem; }
.price-features li { display: flex; align-items: center; gap: 0.6rem; font-size: 0.95rem; }
.price-features li::before { content: "✓"; color: var(--green); font-weight: 800; flex-shrink: 0; }
.price-note { font-size: 0.82rem; color: var(--gray-400); margin-top: 0.8rem; }

/* FOOTER */
footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 0.88rem;
}
footer a { color: var(--gray-400); }
footer .footer-links { display: flex; justify-content: center; gap: 1.5rem; margin-top: 0.8rem; }

/* RESPONSIVE */
@media (max-width: 600px) {
  .nav-links .hide-mobile { display: none; }
  .hero { padding: 3.5rem 1rem 3rem; }
  .hero-stats { gap: 1.2rem; }
  section { padding: 3rem 1rem; }
}