/* ==========================================================
   ProvaDentUSA — single-page review site
   style.css — dependency-free, mobile-first
   ========================================================== */

:root {
  --navy: #18264e;
  --navy-2: #22325f;
  --accent: #2563c4;
  --accent-dark: #1a4c9c;
  --green: #147a3f;
  --green-dark: #0d5c2e;
  --green-bg: #e9f6ee;
  --ink: #23273a;
  --muted: #5a6178;
  --line: #e3e7f0;
  --bg-soft: #f6f8fc;
  --bg-cream: #fbf9f5;
  --vendor: #8a5a00;
  --vendor-bg: #fdf3e1;
  --radius: 12px;
  --shadow-sm: 0 1px 3px rgba(24, 38, 78, 0.08);
  --shadow-md: 0 10px 30px rgba(24, 38, 78, 0.12);
  --maxw: 1120px;
  --readw: 740px;
  --header-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 56px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 20px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 200;
  background: var(--navy);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 8px 0;
  text-decoration: none;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------------- Header ---------------- */

.disclosure-bar {
  background: var(--navy);
  color: #cdd7ef;
  font-size: 13px;
  line-height: 1.45;
  padding: 7px 20px;
  text-align: center;
}
.disclosure-bar p { margin: 0; max-width: var(--maxw); margin-inline: auto; }
.disclosure-bar a { color: #9fc0f5; }
.disclosure-bar strong { color: #fff; font-weight: 600; }

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .disclosure-bar { position: relative; z-index: 101; }

.header-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 0 20px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--navy);
  min-width: 0;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  background: linear-gradient(145deg, var(--navy), var(--navy-2));
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  border-radius: 10px;
  letter-spacing: 0.5px;
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
  line-height: 1.1;
  display: flex;
  flex-direction: column;
}
.brand-text em { font-style: normal; color: var(--accent); display: inline; }
.brand-text small {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 2px;
}

/* Navigation toggle — real <button>, JS-driven, works with mouse,
   touch, keyboard and screen readers. */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  border: 0;
  background: transparent;
  border-radius: 8px;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.nav-toggle:hover { background: var(--bg-soft); }
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  pointer-events: none;
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  padding: 10px 20px 18px;
  flex-direction: column;
  gap: 2px;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle[aria-expanded="true"] ~ .site-nav { display: flex; }

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15.5px;
  padding: 11px 12px;
  border-radius: 8px;
}
.site-nav a:hover { background: var(--bg-soft); color: var(--accent-dark); }
.site-nav a.nav-cta {
  margin-top: 6px;
  text-align: center;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
}
.site-nav a.nav-cta:hover { background: var(--accent-dark); color: #fff; }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    box-shadow: none;
    border: 0;
    padding: 0;
    gap: 4px;
  }
  .site-nav a { padding: 8px 12px; }
  .site-nav a.nav-cta { margin: 0 0 0 8px; padding: 9px 18px; }
}

/* ---------------- Hero ---------------- */

.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, #e8effc 0%, rgba(232, 239, 252, 0) 60%),
    linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
  padding: 44px 0 40px;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  gap: 28px;
  align-items: center;
  grid-template-columns: minmax(0, 1fr);
}
.hero-copy, .offer-copy { min-width: 0; }
.eyebrow {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(1.75rem, 4.4vw, 2.55rem);
  line-height: 1.18;
  letter-spacing: -0.6px;
  color: var(--navy);
  margin: 0 0 16px;
  max-width: 22ch;
}
.lede {
  font-size: 17px;
  color: var(--muted);
  margin: 0 0 18px;
  max-width: 58ch;
}
.offer-strip {
  background: #eaf1fb;
  border: 1px solid #c5d7f2;
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 12px 16px;
  max-width: 560px;
  margin-bottom: 20px;
}
.offer-strip p { margin: 0; font-size: 14.5px; color: #1b3e78; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}
.hero-media { margin: 0; text-align: center; }
.hero-media img { margin-inline: auto; filter: drop-shadow(0 24px 30px rgba(24, 38, 78, 0.18)); }
.hero-media figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }

@media (min-width: 900px) {
  .hero { padding: 64px 0 56px; }
  .hero-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 40px; }
}

/* Checklist (hero + offer) */
.checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px 24px;
  grid-template-columns: minmax(0, 1fr);
  grid-template-columns: 1fr;
  font-size: 14.5px;
}
.checks li { padding-left: 26px; position: relative; color: var(--ink); }
.checks li::before {
  content: "✔";
  position: absolute;
  left: 0; top: 0;
  color: var(--accent);
  font-weight: 800;
}
@media (min-width: 640px) { .checks { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* Hero stat chips */
.stat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}
.stat {
  font-size: 12.5px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 13px;
  line-height: 1.35;
}
.stat strong { color: var(--navy); font-weight: 700; }

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.2;
  text-decoration: none;
  padding: 14px 24px;
  border-radius: 999px;
  border: 2px solid transparent;
  max-width: 100%;
  white-space: normal;
  text-align: center;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(37, 99, 196, 0.35);
}
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-ghost {
  background: #fff;
  color: var(--navy);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-dark); }
.btn-block { display: flex; width: 100%; text-align: center; }
.btn-offer {
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  padding: 17px 30px;
  box-shadow: 0 8px 22px rgba(37, 99, 196, 0.4);
}
.btn-offer:hover { background: var(--accent-dark); color: #fff; }

/* ---------------- On this page (TOC) ---------------- */

.toc-wrap { background: #fff; padding: 30px 0 10px; }
.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.toc-title {
  margin: 0 0 10px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--muted);
}
.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  columns: 1;
  column-gap: 40px;
  font-size: 15px;
}
.toc li { break-inside: avoid; padding: 4px 0; }
.toc li::before { content: "– "; color: var(--accent); font-weight: 700; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--accent-dark); text-decoration: underline; }
@media (min-width: 640px) { .toc ol { columns: 2; } }
@media (min-width: 940px) { .toc ol { columns: 3; } }

/* ---------------- Article / Sections ---------------- */

.article { padding-bottom: 20px; }

.section {
  padding: 34px 0 12px;
  border-top: 1px solid var(--line);
  margin-top: 28px;
}
.section:first-of-type { border-top: 0; margin-top: 8px; }

.section > h2 {
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: -0.4px;
  color: var(--navy);
  margin: 0 0 16px;
  max-width: 30ch;
}
.section h3 {
  font-size: 1.1rem;
  color: var(--navy-2);
  margin: 24px 0 8px;
  line-height: 1.35;
}
.section p { margin: 0 0 16px; max-width: var(--readw); }
.section ul, .section ol { max-width: var(--readw); padding-left: 24px; margin: 0 0 16px; }
.section li { margin-bottom: 8px; }
.section li::marker { color: var(--accent); font-weight: 700; }

.fine-print { font-size: 13.5px; color: var(--muted); }

/* Chips */
.chip {
  display: inline-block;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 2.5px 8px;
  border-radius: 999px;
  vertical-align: middle;
  white-space: nowrap;
}
.chip-vendor { background: var(--vendor-bg); color: var(--vendor); border: 1px solid #ecd9ab; }

/* Note box */
.note-box {
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 22px 0;
  max-width: var(--readw);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
}
.note-box p { margin: 0; font-size: 15.5px; }

/* Two-column layout */
.two-col { display: grid; gap: 8px 40px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 760px) { .two-col { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* Mechanism + safety lists */
.mechanism-list li, .safety-list li { margin-bottom: 12px; }

/* Inline CTA */
.inline-cta { margin: 22px 0 6px; max-width: var(--readw); }

/* ---------------- Tables ---------------- */

.table-wrap {
  overflow-x: auto;
  margin: 18px 0 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  max-width: 940px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.55;
  min-width: 560px;
}
.data-table th,
.data-table td {
  text-align: left;
  vertical-align: top;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}
.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table thead th {
  background: var(--navy);
  color: #fff;
  font-size: 12.5px;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  font-weight: 700;
}
.data-table tbody tr:nth-child(even) td { background: #fcfdff; }

/* ---------------- Images / figures ---------------- */

.media-block { margin: 26px 0; max-width: var(--readw); }
.media-block img {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  padding: 10px;
}
.media-block figcaption {
  font-size: 13px;
  color: var(--muted);
  padding: 8px 6px 0;
}

@media (min-width: 820px) {
  .media-right { float: right; width: 340px; margin: 6px 0 24px 30px; }
  .media-left { float: left; width: 300px; margin: 6px 30px 10px 0; }
  .section::after { content: ""; display: table; clear: both; }
  .media-right img, .media-left img { padding: 8px; }
}

/* ---------------- "How it works" step cards ---------------- */

.step-grid {
  display: grid;
  gap: 16px;
  margin: 22px 0 6px;
  grid-template-columns: minmax(0, 1fr);
}
.step {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 16px 66px;
  min-width: 0;
}
.step-letter {
  position: absolute;
  left: 18px; top: 18px;
  width: 34px; height: 34px;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: #fff;
  font-weight: 800;
  border-radius: 10px;
  margin: 0;
}
.step h3 { margin-top: 0; }
.step p { margin: 0; font-size: 15px; color: var(--muted); }
@media (min-width: 700px) { .step-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* ---------------- Ingredient cards ---------------- */

.ing-grid {
  display: grid;
  gap: 16px;
  margin: 20px 0 8px;
  grid-template-columns: minmax(0, 1fr);
}
.ing-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.ing-tag {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 6px;
}
.ing-card h3 { margin: 0 0 8px; }
.ing-card p { margin: 0; font-size: 15px; color: var(--muted); }
@media (min-width: 700px) { .ing-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
@media (min-width: 1000px) { .ing-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

/* ---------------- Benefit list ---------------- */

.benefit-list {
  list-style: none !important;
  padding: 0 !important;
  max-width: 920px !important;
  display: grid;
  gap: 10px 28px;
  margin: 20px 0 22px !important;
}
.benefit-list li {
  position: relative;
  padding: 12px 14px 12px 42px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  margin-bottom: 0 !important;
}
.benefit-list li::before {
  content: "✓";
  position: absolute;
  left: 14px; top: 11px;
  font-weight: 800;
  color: var(--accent);
  font-size: 17px;
}
.benefit-list strong { color: var(--navy); }
@media (min-width: 760px) { .benefit-list { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* ---------------- Benefit cards ---------------- */

.benefit-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
  margin: 20px 0 24px;
}
.benefit {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  min-width: 0;
}
.benefit h3 { margin: 0 0 8px; font-size: 1.02rem; color: var(--navy); }
.benefit p { margin: 0; font-size: 15px; color: var(--muted); }
@media (min-width: 700px) { .benefit-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
@media (min-width: 1000px) { .benefit-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

/* ---------------- Bonus cards ---------------- */

.bonus-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr);
  margin: 22px 0;
  max-width: 940px;
}
.bonus-card {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}
.bonus-card img {
  border-radius: 8px;
  border: 1px solid var(--line);
}
.bonus-card h3 { margin: 0 0 6px; }
.bonus-card p { margin: 0 0 6px; font-size: 14.5px; color: var(--muted); }
.bonus-tag {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--accent) !important;
  text-transform: uppercase;
}
.bonus-value s { color: #b65555; }
.bonus-value strong { color: var(--green); }
@media (min-width: 800px) { .bonus-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* ---------------- Pricing cards ---------------- */

.price-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 1fr);
  margin: 24px 0 20px;
}
.price-card {
  position: relative;
  background: #fff;
  border: 2px solid var(--line);
  border-radius: 16px;
  padding: 26px 22px 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.price-card img {
  width: 70%;
  max-width: 240px;
  margin: 8px auto 14px;
}
.price-card-featured {
  border-color: var(--accent);
  box-shadow: 0 14px 34px rgba(37, 99, 196, 0.18);
}
.price-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(37, 99, 196, 0.4);
}
.price-label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1.6px;
  color: var(--muted);
  text-transform: uppercase;
  margin: 0;
}
.price-card h3 { margin: 2px 0 0; font-size: 1.5rem; color: var(--navy); }
.price-supply { margin: 0 0 4px; font-size: 14px; color: var(--muted); }
.price-big {
  font-size: 3rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.1;
  margin: 6px 0 2px !important;
  letter-spacing: -2px;
}
.price-big span {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--muted);
}
.price-total { font-size: 15px; margin: 0 0 16px !important; }
.price-total s { color: #b65555; }
.price-total strong { font-size: 1.25rem; color: var(--ink); }
.price-note { font-size: 13px; color: var(--muted); margin: 12px 0 0 !important; }
.price-details { padding-left: 20px !important; }
.price-details li { font-size: 13.5px; }
@media (min-width: 980px) {
  .price-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: stretch; }
  .price-card-featured { transform: translateY(-8px); }
}
@media (min-width: 980px) and (prefers-reduced-motion: no-preference) {
  .price-card-featured { transform: translateY(-8px); }
}
@media (min-width: 560px) and (max-width: 979px) {
  .price-grid { max-width: 520px; margin-inline: auto; }
}

/* ---------------- Customer reviews ---------------- */

.review-collage img {
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.review-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
  margin: 20px 0 16px;
}
.review-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.review-head {
  display: flex;
  align-items: center;
  gap: 14px;
}
.review-photo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--line);
}
.review-stars {
  margin: 0 0 2px;
  color: #e8a02c;
  font-size: 15px;
  letter-spacing: 2px;
  line-height: 1;
}
.review-name {
  margin: 0;
  font-weight: 700;
  font-size: 15.5px;
}
.review-quote {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
  color: var(--ink);
  font-size: 15.5px;
  line-height: 1.6;
}
.review-note {
  margin: 18px 0;
  padding: 16px 20px;
  background: var(--bg-soft);
  border: 1px dashed var(--accent);
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}
@media (min-width: 860px) {
  .review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------------- Pros & cons ---------------- */

.pros-cons-grid {
  display: grid;
  gap: 18px;
  max-width: 940px;
  margin: 20px 0;
  grid-template-columns: minmax(0, 1fr);
}
.pros, .cons {
  border-radius: var(--radius);
  padding: 20px 24px;
}
.pros { background: var(--green-bg); border: 1px solid #bfe4cc; }
.cons { background: #fdf1f0; border: 1px solid #f3cfcc; }
.pros h3, .cons h3 { margin-top: 0; }
.pros ul, .cons ul { margin: 0; padding-left: 22px; }
.pros li::marker { color: var(--green); }
.cons li::marker { color: #c0392b; }
.pros p, .cons p { font-size: 15px; }
@media (min-width: 760px) { .pros-cons-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* ---------------- FAQ ---------------- */

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: #fff;
  max-width: 900px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 52px 16px 20px;
  position: relative;
  transition: background 0.15s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--bg-soft); }
.faq-item summary h3 {
  margin: 0;
  font-size: 1.02rem;
  color: var(--navy);
  font-weight: 600;
  line-height: 1.4;
}
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px; height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--navy);
  font-size: 18px;
  font-weight: 700;
  transition: transform 0.15s ease, background 0.15s ease;
}
.faq-item[open] summary { border-bottom: 1px solid var(--line); }
.faq-item[open] summary::after {
  content: "–";
  background: var(--accent);
  color: #fff;
}
.faq-item p {
  padding: 16px 20px 18px;
  margin: 0;
  font-size: 15.5px;
  color: #3a3f52;
  max-width: none;
}

/* ---------------- Special offer CTA ---------------- */

.offer { margin-top: 50px; }
.offer-banner {
  background: linear-gradient(90deg, var(--navy), var(--accent));
  color: #fff;
  text-align: center;
  padding: 14px 20px;
}
.offer-banner p {
  margin: 0;
  font-size: clamp(15px, 2.4vw, 19px);
  letter-spacing: 0.3px;
}
.offer-inner {
  display: grid;
  gap: 24px;
  align-items: center;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 36px;
  padding-bottom: 40px;
  background: #fff;
  text-align: center;
}
.offer-media { margin: 0; }
.offer-media img { display: block; width: 100%; max-width: 420px; height: auto; margin-inline: auto; }
.offer-tag {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 6px;
}
.offer-price {
  margin: 0 0 16px;
  line-height: 1;
}
.offer-price s { font-size: 1.6rem; color: #b4b9c9; font-weight: 600; }
.offer-price strong { font-size: 4rem; font-weight: 800; color: #16162e; letter-spacing: -3px; }
.offer-price span { font-size: 1.3rem; color: var(--muted); }
.offer .checks { max-width: 460px; margin: 0 auto 22px; text-align: left; }
.offer .fine-print { margin: 12px 0 0; }
@media (min-width: 880px) {
  .offer-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); text-align: left; }
  .offer .checks { margin-left: 0; }
}

/* ---------------- Scientific references ---------------- */

.references { padding-bottom: 54px; }
.ref-banner {
  background: linear-gradient(90deg, var(--navy), var(--accent));
  text-align: center;
  padding: 16px 20px;
  margin-bottom: 30px;
}
.ref-banner h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  letter-spacing: 0.4px;
}
.ref-intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 22px;
  color: var(--muted);
  font-size: 15.5px;
}
.ref-sources {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px 26px;
  padding: 18px 10px 26px;
}
.src {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.15;
  font-weight: 800;
  font-size: 19px;
  color: var(--navy);
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.src small {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--muted);
}
.src-nih { color: #20558a; font-family: Georgia, serif; }
.src-cochrane { color: #0a5da6; letter-spacing: 1px; }
.src-bmj { color: #11306e; font-style: italic; font-family: Georgia, serif; }
.src-frontiers { color: #333; letter-spacing: 0.5px; font-weight: 700; }
.src-frontiers::after { content: "Science News"; font-size: 9.5px; letter-spacing: 1.4px; color: #4fa8d8; text-transform: uppercase; }
.src-sciencedirect { color: #e97132; font-family: Georgia, serif; }
.src-jcda { color: #123; font-family: Georgia, serif; font-size: 16px; }
.src-ada { color: #0f67a3; }
.src-fda { color: #1c3664; letter-spacing: 3px; }
.src-nature { color: #111; font-family: Georgia, serif; letter-spacing: 0.5px; }
.src-wiley { color: #12294b; font-family: Georgia, serif; font-style: italic; font-size: 18px; }
.src-mdpi { color: #1a73b6; }
.src-who { color: #0093d5; letter-spacing: 2px; }

.ref-grid {
  display: grid;
  gap: 8px 48px;
  grid-template-columns: minmax(0, 1fr);
}
.ref-list { margin: 0; padding-left: 26px; }
.ref-list li {
  margin-bottom: 18px;
  font-size: 15px;
  line-height: 1.55;
}
.ref-list li::marker { font-weight: 800; color: var(--navy); }
.ref-list a { font-weight: 600; text-decoration: none; }
.ref-list a:hover { text-decoration: underline; }
.ref-list small { color: var(--muted); font-size: 13px; line-height: 1.5; display: inline-block; margin-top: 2px; }
@media (min-width: 880px) { .ref-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* ---------------- Legal pages ---------------- */

.legal-page .section {
  max-width: 860px;
  margin-inline: auto;
  padding: 44px 20px 60px;
}
.legal-page h1 {
  margin-bottom: 8px;
}
.legal-page .updated {
  color: var(--muted);
  font-size: 14px;
  margin-top: 0;
}
.legal-page h2 {
  font-size: 21px;
  margin: 34px 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.legal-page ul li { margin-bottom: 8px; }
.legal-page .eyebrow {
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-size: 12px;
  margin-bottom: 10px;
}

/* Quick-facts table (at-a-glance): stack rows on small screens */
@media (max-width: 600px) {
  .facts-table { min-width: 0; }
  .facts-table caption { display: block; text-align: center; padding-bottom: 6px; }
  .facts-table, .facts-table tbody, .facts-table tr,
  .facts-table th, .facts-table td { display: block; width: 100%; }
  .facts-table tr { border-bottom: 1px solid var(--line); }
  .facts-table th { padding: 12px 14px 2px; border: 0; }
  .facts-table td { padding: 4px 14px 14px; border: 0; }
}

/* ---------------- Footer ---------------- */

.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin-top: 0;
  font-size: 14px;
  text-align: center;
  padding: 44px 0 30px;
}
.legal-block {
  max-width: 880px;
  margin: 0 auto 30px;
  padding: 0 4px;
}
.legal-block h2 {
  font-size: 1.35rem;
  color: #16162e;
  margin: 0 0 12px;
  letter-spacing: -0.2px;
}
.legal-block p { font-size: 13px; line-height: 1.75; margin: 0 0 12px; }
.legal-block strong { color: #1e2333; }
.footer-links {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  margin: 36px auto 18px;
  max-width: 880px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  font-size: 13.5px;
}
.footer-links a { color: var(--accent); text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }
.copyright { font-size: 12.5px; color: #9aa0b5; margin: 0; }

/* ---------------- Fine responsive tuning ---------------- */

html { -webkit-tap-highlight-color: transparent; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .section { padding: 28px 0 10px; }
  .toc { padding: 16px 18px; }
  .container, .header-inner { padding-inline: 16px; }
  .offer-strip { padding: 10px 14px; }
  .btn { width: 100%; justify-content: center; }
  .hero-actions { flex-direction: column; }
  .price-big { font-size: 2.6rem; }
  .offer-price strong { font-size: 3.4rem; }
  .offer-price s { font-size: 1.3rem; }
  .bonus-card { grid-template-columns: 88px 1fr; gap: 14px; padding: 14px; }
  .step { padding: 18px 16px 14px 60px; }
  .step-letter { left: 14px; top: 15px; }
  .src { font-size: 15px; padding: 6px 10px; }
  .ref-sources { gap: 10px 12px; }
  .ref-list { padding-left: 20px; }
  .footer-links { gap: 6px 14px; }
  .offer-inner { padding-top: 26px; padding-bottom: 30px; }
}

@media (min-width: 561px) and (max-width: 899px) {
  .offer-inner { text-align: center; }
  .offer .checks { margin-inline: auto; }
}

/* ---------------- Motion preferences ---------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    transform: none !important;
  }
}