/* =============================================
   ProDentim Review Site — Global Design System
   Zero CDN dependencies. Pure vanilla CSS.
   ============================================= */

/* ── Variables ── */
:root {
  --mint:       #10b981;
  --mint-dark:  #059669;
  --mint-light: #d1fae5;
  --navy:       #0f172a;
  --navy-mid:   #1e3a5f;
  --navy-light: #1e40af;
  --white:      #ffffff;
  --off-white:  #f8fafc;
  --gray-100:   #f1f5f9;
  --gray-200:   #e2e8f0;
  --gray-400:   #94a3b8;
  --gray-600:   #475569;
  --gray-800:   #1e293b;
  --gold:       #f59e0b;
  --red-light:  #fee2e2;
  --red:        #ef4444;

  --font-main: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 4px 24px rgba(15,23,42,0.10);
  --shadow-lg: 0 8px 40px rgba(15,23,42,0.16);
  --transition: 0.25s ease;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--off-white);
  color: var(--gray-800);
  line-height: 1.7;
  font-size: 17px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--mint-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--mint); }

/* ── Typography ── */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--navy); }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); margin-bottom: 0.5rem; }
p  { margin-bottom: 1rem; color: var(--gray-600); }
strong { color: var(--gray-800); }

/* ── Layout ── */
.container { max-width: 900px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
section { padding: 60px 0; }

/* ── Reading Progress Bar ── */
#progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--mint), var(--navy-light));
  z-index: 9999; transition: width 0.1s linear;
}

/* ── Header / Nav ── */
.site-header {
  position: sticky; top: 0; z-index: 900;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; max-width: 1100px; margin: 0 auto;
}
.logo { color: var(--white); font-size: 1.2rem; font-weight: 800; letter-spacing: -0.3px; }
.logo span { color: var(--mint); }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: rgba(255,255,255,0.8); font-size: 0.9rem; font-weight: 500; transition: color var(--transition); }
.nav-links a:hover { color: var(--mint); }
.header-cta {
  background: var(--mint); color: var(--white) !important;
  padding: 8px 18px; border-radius: 50px; font-weight: 700 !important;
  font-size: 0.85rem !important; white-space: nowrap;
  box-shadow: 0 2px 10px rgba(16,185,129,0.4);
  transition: background var(--transition), transform var(--transition) !important;
}
.header-cta:hover { background: var(--mint-dark) !important; transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }

/* ── Disclosure Banner ── */
.disclosure-banner {
  background: #fef3c7; border-bottom: 1px solid #fde68a;
  padding: 8px 20px; text-align: center; font-size: 0.8rem; color: #92400e;
}
.disclosure-banner a { color: #92400e; text-decoration: underline; }

/* ── Hero Section ── */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 60%, #164e63 100%);
  padding: 70px 0 60px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(16,185,129,0.12) 0%, transparent 70%);
}
.hero-inner {
  max-width: 900px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 50px; position: relative; z-index: 1;
}
.hero-text { flex: 1; }
.hero-badge {
  display: inline-block; background: rgba(16,185,129,0.2); color: var(--mint);
  border: 1px solid rgba(16,185,129,0.4); padding: 5px 14px; border-radius: 50px;
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.5px; margin-bottom: 16px;
  text-transform: uppercase;
}
.hero h1 { color: var(--white); margin-bottom: 16px; }
.hero h1 span { color: var(--mint); }
.hero-sub { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 24px; }
.trust-bar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 28px;
  color: rgba(255,255,255,0.75); font-size: 0.9rem;
}
.stars { color: var(--gold); font-size: 1.1rem; letter-spacing: 1px; }
.trust-divider { width: 1px; height: 16px; background: rgba(255,255,255,0.3); }
.hero-image { flex-shrink: 0; text-align: center; }
.hero-image img {
  width: 200px; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.5));
  animation: float 4s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}

/* ── CTA Buttons ── */
.btn {
  display: inline-block; padding: 16px 36px; border-radius: 50px;
  font-weight: 700; font-size: 1rem; text-align: center; cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  border: none; text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--mint) 0%, var(--mint-dark) 100%);
  color: var(--white); box-shadow: 0 6px 24px rgba(16,185,129,0.45);
}
.btn-primary:hover { box-shadow: 0 10px 32px rgba(16,185,129,0.6); color: var(--white); }
.btn-secondary {
  background: var(--white); color: var(--mint-dark);
  border: 2px solid var(--mint); box-shadow: var(--shadow);
}
.btn-secondary:hover { background: var(--mint-light); }
.btn-lg { padding: 18px 48px; font-size: 1.1rem; }
.btn-block { display: block; width: 100%; text-align: center; }
.cta-note { font-size: 0.78rem; color: rgba(255,255,255,0.6); margin-top: 10px; text-align: center; }
.cta-note-dark { font-size: 0.78rem; color: var(--gray-400); margin-top: 10px; text-align: center; }

/* ── Cards & Sections ── */
.card {
  background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 28px; border: 1px solid var(--gray-200);
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card-grid { display: grid; gap: 20px; }
.card-grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card-grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ── Section Headers ── */
.section-label {
  display: inline-block; background: var(--mint-light); color: var(--mint-dark);
  padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 12px;
}
.section-header { text-align: center; margin-bottom: 48px; }
.section-header p { max-width: 600px; margin: 0 auto; }

/* ── Checklist / Benefits ── */
.check-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.check-list li {
  display: flex; align-items: flex-start; gap: 12px; padding: 14px 18px;
  background: var(--white); border-radius: var(--radius); border: 1px solid var(--gray-200);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.check-list li::before {
  content: '✓'; background: var(--mint); color: var(--white);
  width: 22px; height: 22px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; font-size: 0.75rem;
  font-weight: 900; flex-shrink: 0; margin-top: 2px;
}

/* ── X-list (problems) ── */
.x-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.x-list li {
  display: flex; align-items: flex-start; gap: 12px; padding: 12px 16px;
  background: var(--red-light); border-radius: var(--radius);
  border-left: 3px solid var(--red); color: var(--gray-800);
}
.x-list li::before {
  content: '✗'; color: var(--red); font-size: 1rem; font-weight: 900;
  flex-shrink: 0; margin-top: 1px;
}

/* ── Ingredient Cards ── */
.ingredient-card {
  background: var(--white); border-radius: var(--radius); padding: 24px;
  border: 1px solid var(--gray-200); box-shadow: var(--shadow);
  border-top: 3px solid var(--mint); transition: transform var(--transition);
}
.ingredient-card:hover { transform: translateY(-3px); }
.ingredient-card .badge {
  display: inline-block; background: var(--mint-light); color: var(--mint-dark);
  padding: 2px 10px; border-radius: 50px; font-size: 0.72rem; font-weight: 700;
  margin-bottom: 8px; text-transform: uppercase;
}

/* ── Testimonials ── */
.testimonial {
  background: var(--white); border-radius: var(--radius); padding: 24px;
  border: 1px solid var(--gray-200); box-shadow: var(--shadow);
  position: relative;
}
.testimonial::before {
  content: '"'; position: absolute; top: -10px; left: 20px;
  font-size: 5rem; color: var(--mint); opacity: 0.25; line-height: 1;
  font-family: Georgia, serif;
}
.testimonial .stars { font-size: 1rem; margin-bottom: 10px; }
.testimonial p { font-style: italic; color: var(--gray-600); margin-bottom: 14px; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-author .avatar {
  width: 42px; height: 42px; border-radius: 50%; background: var(--mint-light);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: var(--mint-dark); font-size: 1rem; flex-shrink: 0;
}
.testimonial-author .name { font-weight: 700; font-size: 0.95rem; color: var(--navy); }
.testimonial-author .meta { font-size: 0.78rem; color: var(--gray-400); }
.verified-badge {
  display: inline-flex; align-items: center; gap: 4px;
  background: #dcfce7; color: #166534; padding: 2px 8px;
  border-radius: 50px; font-size: 0.7rem; font-weight: 700; margin-top: 4px;
}

/* ── Pricing Cards ── */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.pricing-card {
  background: var(--white); border: 2px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 28px 20px; text-align: center; position: relative; transition: transform var(--transition);
}
.pricing-card:hover { transform: translateY(-4px); }
.pricing-card.popular { border-color: var(--mint); box-shadow: 0 8px 32px rgba(16,185,129,0.2); }
.popular-tag {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--mint); color: var(--white); padding: 4px 16px;
  border-radius: 50px; font-size: 0.75rem; font-weight: 700; white-space: nowrap;
}
.price-old { text-decoration: line-through; color: var(--gray-400); font-size: 0.95rem; }
.price-now { font-size: 2.4rem; font-weight: 800; color: var(--navy); line-height: 1; }
.price-now span { font-size: 1.2rem; vertical-align: super; }
.price-per { font-size: 0.82rem; color: var(--gray-400); margin-bottom: 16px; }

/* ── Comparison Table ── */
.compare-table { width: 100%; border-collapse: collapse; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare-table th { background: var(--navy); color: var(--white); padding: 14px 18px; text-align: left; font-size: 0.9rem; }
.compare-table td { padding: 13px 18px; border-bottom: 1px solid var(--gray-200); font-size: 0.95rem; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:nth-child(even) td { background: var(--gray-100); }
.compare-table .winner { color: var(--mint-dark); font-weight: 700; }
.compare-table .loser { color: var(--gray-400); }
.tick { color: var(--mint); font-weight: 900; font-size: 1.1rem; }
.cross { color: var(--red); font-weight: 900; font-size: 1.1rem; }

/* ── FAQ Accordion ── */
.faq-item {
  border: 1px solid var(--gray-200); border-radius: var(--radius);
  margin-bottom: 10px; overflow: hidden; background: var(--white);
}
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 22px; cursor: pointer; font-weight: 600; color: var(--navy);
  transition: background var(--transition); user-select: none;
}
.faq-question:hover { background: var(--gray-100); }
.faq-icon { font-size: 1.2rem; color: var(--mint); transition: transform var(--transition); flex-shrink: 0; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-answer.open { max-height: 400px; }
.faq-answer-inner { padding: 0 22px 18px; color: var(--gray-600); }
.faq-icon.open { transform: rotate(45deg); }

/* ── Guarantee Box ── */
.guarantee-box {
  background: linear-gradient(135deg, #f0fdf4, #dcfce7);
  border: 2px solid #86efac; border-radius: var(--radius-lg);
  padding: 36px; text-align: center;
}
.guarantee-icon { font-size: 3.5rem; margin-bottom: 12px; }
.guarantee-box h2 { color: #166534; }
.guarantee-box p { color: #166534; opacity: 0.85; }

/* ── Alert / Callout Boxes ── */
.callout {
  border-radius: var(--radius); padding: 20px 24px; margin: 24px 0;
  display: flex; gap: 14px; align-items: flex-start;
}
.callout-mint { background: var(--mint-light); border-left: 4px solid var(--mint); }
.callout-yellow { background: #fef9c3; border-left: 4px solid #eab308; }
.callout-red { background: var(--red-light); border-left: 4px solid var(--red); }
.callout-icon { font-size: 1.3rem; flex-shrink: 0; }
.callout p { margin: 0; font-size: 0.95rem; }

/* ── Sticky Mobile CTA Bar ── */
.sticky-cta {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 800;
  background: var(--navy); padding: 12px 16px;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
  align-items: center; gap: 12px;
}
.sticky-cta p { color: rgba(255,255,255,0.8); font-size: 0.82rem; margin: 0; flex: 1; }
.sticky-cta a { white-space: nowrap; padding: 10px 20px; font-size: 0.9rem; }

/* ── Exit-Intent Popup ── */
.popup-overlay {
  display: none; position: fixed; inset: 0; z-index: 9000;
  background: rgba(15,23,42,0.75); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 20px;
}
.popup-overlay.show { display: flex; }
.popup-box {
  background: var(--white); border-radius: var(--radius-lg);
  max-width: 480px; width: 100%; padding: 36px; text-align: center;
  position: relative; animation: popIn 0.3s ease;
}
@keyframes popIn { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.popup-close {
  position: absolute; top: 14px; right: 18px; font-size: 1.4rem;
  cursor: pointer; color: var(--gray-400); background: none; border: none;
  transition: color var(--transition);
}
.popup-close:hover { color: var(--gray-800); }

/* ── About Author ── */
.author-card {
  display: flex; gap: 28px; align-items: flex-start;
  background: var(--white); border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--gray-200); box-shadow: var(--shadow);
}
.author-avatar {
  width: 100px; height: 100px; border-radius: 50%; background: var(--mint-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; flex-shrink: 0; border: 4px solid var(--mint);
}
.credentials { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.credential-tag {
  background: var(--navy); color: var(--white); padding: 4px 12px;
  border-radius: 50px; font-size: 0.75rem; font-weight: 600;
}

/* ── Footer ── */
.site-footer {
  background: var(--navy); color: rgba(255,255,255,0.65);
  padding: 48px 0 20px;
}
.footer-inner { max-width: 900px; margin: 0 auto; padding: 0 20px; }
.footer-logo { color: var(--white); font-size: 1.2rem; font-weight: 800; margin-bottom: 12px; }
.footer-logo span { color: var(--mint); }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; margin: 16px 0; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.85rem; text-decoration: underline; }
.footer-links a:hover { color: var(--mint); }
.footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.1); margin: 20px 0; }
.footer-disclaimer { font-size: 0.75rem; line-height: 1.6; color: rgba(255,255,255,0.45); }

/* ── Breadcrumb ── */
.breadcrumb { font-size: 0.82rem; color: var(--gray-400); padding: 12px 0; }
.breadcrumb a { color: var(--mint-dark); }
.breadcrumb span { margin: 0 6px; }

/* ── Ribbon / Badge ── */
.ribbon {
  background: var(--gold); color: var(--navy); font-size: 0.75rem; font-weight: 800;
  padding: 4px 12px; border-radius: 50px; text-transform: uppercase; letter-spacing: 0.5px;
}

/* ── Score Bar ── */
.score-bar { margin: 10px 0; }
.score-bar-label { display: flex; justify-content: space-between; font-size: 0.85rem; margin-bottom: 4px; }
.score-bar-track { height: 8px; background: var(--gray-200); border-radius: 4px; overflow: hidden; }
.score-bar-fill { height: 100%; background: linear-gradient(90deg, var(--mint), var(--mint-dark)); border-radius: 4px; transition: width 1s ease; }

/* ── Utility ── */
.text-center { text-align: center; }
.text-mint { color: var(--mint); }
.text-navy { color: var(--navy); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.fw-700 { font-weight: 700; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.gap-20 { gap: 20px; }
.bg-white { background: var(--white); }
.bg-gray { background: var(--gray-100); }
.bg-navy { background: var(--navy); }
.rounded { border-radius: var(--radius); }
.shadow { box-shadow: var(--shadow); }
.p-6 { padding: 24px; }
.p-8 { padding: 32px; }
.divider { border: none; border-top: 1px solid var(--gray-200); margin: 40px 0; }

/* ── Animations ── */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--navy); padding: 20px; gap: 16px; z-index: 800;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  }
  .hamburger { display: flex; }
  .hero-inner { flex-direction: column-reverse; text-align: center; gap: 30px; }
  .hero-image img { width: 160px; }
  .trust-bar { justify-content: center; }
  .sticky-cta { display: flex; }
  .author-card { flex-direction: column; }
  .compare-table { font-size: 0.82rem; }
  .compare-table th, .compare-table td { padding: 10px 12px; }
  body { padding-bottom: 80px; }
}
@media (max-width: 480px) {
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.4rem; }
  .btn-lg { padding: 14px 28px; font-size: 1rem; }
  section { padding: 40px 0; }
}