/*
 * MyTop50 — main stylesheet
 *
 * Accessibility targets:
 *   - Body text contrast: 19:1 (#1a1a1a on #ffffff)
 *   - Muted text contrast: 7.4:1 (#555555 on #ffffff)
 *   - Link contrast: 10:1 (#0b3d91 on #ffffff)
 *   - Accent amber contrast: 5.4:1 (#9a5a00 on #ffffff)
 *   - Focus ring: 3px solid #0b3d91 with 2px offset, visible on all interactive elements
 *
 * Fonts: system stack only. No web fonts, no external requests.
 * Layout: mobile-first. Single breakpoint at 760px. Content max-width 68rem.
 */

:root {
  --ink:        #1a1a1a;
  --muted:      #555555;
  --link:       #0b3d91;
  --link-hover: #062a6e;
  --accent:     #9a5a00;
  --accent-bg:  #fff7e6;
  --border:     #d1d5db;
  --surface:    #ffffff;
  --tint:       #f6f7f9;
  --focus:      #0b3d91;
  --danger:     #8a1e1e;
  --success:    #0f5132;

  --radius:     4px;
  --gap:        1rem;
  --gap-lg:     2rem;
  --content:    68rem;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-head: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  line-height: 1.2;
  margin: 0 0 0.6em;
  color: var(--ink);
  font-weight: 700;
}

h1 { font-size: 2.1rem; margin-top: 0; }
h2 { font-size: 1.55rem; margin-top: 2rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }
h4 { font-size: 1.05rem; margin-top: 1.25rem; }

p, ul, ol, dl, figure, blockquote, pre {
  margin: 0 0 1rem;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover, a:focus { color: var(--link-hover); }

a:focus, button:focus, input:focus, select:focus, textarea:focus, summary:focus {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* Skip link - visually hidden until focused */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  background: var(--surface);
  color: var(--ink);
  padding: 0.75rem 1rem;
  font-weight: 700;
  border: 2px solid var(--focus);
  z-index: 1000;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
  width: auto;
  height: auto;
  overflow: visible;
}

/* Screen-reader-only helper */
.sr-only {
  position: absolute !important;
  clip-path: inset(50%);
  height: 1px;
  width: 1px;
  overflow: hidden;
  white-space: nowrap;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Site header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header__inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 0;
}

@media (min-width: 760px) {
  .site-header__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
  }
}

.site-brand {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-brand a {
  color: var(--ink);
  text-decoration: none;
}

.site-brand a:hover,
.site-brand a:focus {
  text-decoration: underline;
}

.site-brand__tag {
  display: block;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0;
}

/* Primary nav */
.primary-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}

.primary-nav a {
  display: inline-block;
  padding: 0.375rem 0;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 2px solid transparent;
}

.primary-nav a:hover,
.primary-nav a:focus,
.primary-nav a[aria-current="page"] {
  color: var(--link);
  border-bottom-color: var(--link);
  text-decoration: none;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.9375rem;
  color: var(--muted);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 0.5rem;
  color: var(--muted);
  aria-hidden: true;
}

/* Hero — landing page */
.hero {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--tint) 0%, var(--surface) 100%);
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 1rem;
}

@media (min-width: 760px) {
  .hero h1 { font-size: 3.2rem; }
}

.hero__lead {
  font-size: 1.25rem;
  color: var(--muted);
  max-width: 48rem;
  margin-bottom: 1.5rem;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}

.btn--primary {
  background: var(--link);
  color: var(--surface);
  border-color: var(--link);
}

.btn--primary:hover,
.btn--primary:focus {
  background: var(--link-hover);
  border-color: var(--link-hover);
  color: var(--surface);
}

.btn--secondary {
  background: var(--surface);
  color: var(--link);
  border-color: var(--link);
}

.btn--secondary:hover,
.btn--secondary:focus {
  background: var(--tint);
}

.btn--amazon {
  background: var(--accent);
  color: var(--surface);
  border-color: var(--accent);
}

.btn--amazon:hover,
.btn--amazon:focus {
  background: #7a4800;
  border-color: #7a4800;
  color: var(--surface);
}

/* Main content padding */
main {
  padding: 1.5rem 0 3rem;
}

section {
  margin-bottom: 2.5rem;
}

/* Card grid — used for product lists and category lists */
.card-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card h3 {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.3;
}

.card h3 a {
  text-decoration: none;
  color: var(--ink);
}

.card h3 a:hover,
.card h3 a:focus {
  color: var(--link);
  text-decoration: underline;
}

.card__rank {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1;
  color: var(--accent);
  margin: 0;
}

.card__meta {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0;
}

.card__pitch {
  font-size: 1rem;
  margin: 0;
}

.card__footer {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.5rem;
}

.card__link {
  font-weight: 600;
  text-decoration: underline;
}

/* Category chip list */
.chip-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip-list a {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink);
  background: var(--surface);
  font-size: 0.9375rem;
  font-weight: 600;
}

.chip-list a:hover,
.chip-list a:focus {
  border-color: var(--link);
  color: var(--link);
}

/* Value props on landing */
.value-props {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .value-props { grid-template-columns: repeat(3, 1fr); }
}

.value-prop h3 {
  margin-top: 0;
  color: var(--link);
}

/* Review page layout */
.review-layout {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .review-layout {
    grid-template-columns: minmax(0, 1fr) 18rem;
  }
}

.review-aside {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: var(--tint);
  align-self: start;
}

.rating-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  background: var(--accent-bg);
  margin: 1rem 0 1.5rem;
}

.rating-block p { margin: 0; }

.rating-value {
  font-family: var(--font-head);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
}

/* Pros and cons lists */
.proscons {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .proscons { grid-template-columns: 1fr 1fr; }
}

.proscons__pros,
.proscons__cons {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}

.proscons__pros { background: #f1faf4; border-color: #bfe1c9; }
.proscons__cons { background: #fbf3f3; border-color: #e1c4c4; }

.proscons h3 { margin-top: 0; }

/* FAQ — native disclosure widget */
.faq details {
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}

.faq summary {
  font-weight: 700;
  cursor: pointer;
  padding: 0.5rem 0;
  font-size: 1.05rem;
}

.faq details[open] summary {
  color: var(--link);
}

.faq details > *:not(summary) {
  margin-top: 0.5rem;
}

/* Disclosure notice */
.disclosure {
  font-size: 0.9375rem;
  background: var(--tint);
  border-left: 4px solid var(--accent);
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
}

/* Table of contents */
.toc {
  border: 1px solid var(--border);
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  background: var(--tint);
  margin: 1.5rem 0;
}

.toc h2 { margin-top: 0; font-size: 1.125rem; }

.toc ol, .toc ul {
  margin: 0.5rem 0 0 1.25rem;
  padding: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--tint);
  padding: 2rem 0;
  margin-top: 3rem;
  font-size: 0.9375rem;
}

.site-footer__grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; }
}

.site-footer h2 {
  font-size: 1rem;
  font-family: var(--font-body);
  margin: 0 0 0.5rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin-bottom: 0.25rem;
}

.site-footer__legal {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

/* Print styles - readable printout */
@media print {
  .skip-link, .primary-nav, .site-footer, .hero__ctas, .card__footer { display: none; }
  body { font-size: 11pt; color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
  a[href]:after { content: " (" attr(href) ")"; font-size: 9pt; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}