/* ==========================================================
   blog.css — Dr. Abhishek Dental & Oral Cancer Centre
   Shared stylesheet for every page under /blog/
   Mobile-first · no JavaScript required · print friendly
   Link from each post:  <link rel="stylesheet" href="/blog/blog.css">
   ========================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --ink: #0c2a3e;          /* headings */
  --text: #23404f;         /* body copy */
  --muted: #566f7f;        /* meta, captions */
  --sky: #0ea5e9;          /* brand accent (matches main site) */
  --sky-deep: #0369a1;     /* links, buttons (AA contrast on white) */
  --sky-darker: #075985;
  --mist: #f0f9ff;         /* soft panels */
  --mist-2: #e0f2fe;
  --line: #d3e6f2;         /* borders */
  --white: #ffffff;
  --warn-bg: #fff8e6;
  --warn-line: #f59e0b;
  --warn-ink: #7a4b00;
  --danger-bg: #fff1f2;
  --danger-line: #e11d48;
  --danger-ink: #9f1239;
  --ok-bg: #ecfdf5;
  --ok-line: #10b981;
  --ok-ink: #065f46;
  --wa: #128c4a;           /* WhatsApp green, AA on white text */

  --font: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Devanagari", Arial, sans-serif;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(12, 42, 62, .06), 0 6px 20px rgba(12, 42, 62, .06);
  --header-h: 64px;
  --measure: 720px;        /* reading column */
}

/* ---------- 2. Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 12px);
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;        /* 17px */
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  overflow-wrap: break-word;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
img, svg, video { max-width: 100%; height: auto; }
a { color: var(--sky-deep); text-underline-offset: 3px; }
a:hover { color: var(--sky-darker); }
:focus-visible {
  outline: 3px solid var(--sky);
  outline-offset: 3px;
  border-radius: 4px;
}
.skip-link {
  position: absolute; left: 12px; top: -60px;
  background: var(--ink); color: #fff; padding: 10px 16px;
  border-radius: var(--radius-sm); z-index: 200; text-decoration: none;
}
.skip-link:focus { top: 12px; }

/* ---------- 3. Layout ---------- */
.wrap {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: max(18px, env(safe-area-inset-left, 0)) max(18px, env(safe-area-inset-right, 0));
}
.article-body { max-width: var(--measure); margin-inline: auto; }

/* ---------- 4. Site header ---------- */
.blog-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(1.4) blur(8px);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
}
.blog-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; min-height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand img { width: 40px; height: 40px; object-fit: contain; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand-name { font-weight: 700; font-size: 1rem; }
.brand-sub { font-size: .72rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-links { display: none; gap: 22px; align-items: center; }
.header-links a { color: var(--ink); text-decoration: none; font-weight: 500; font-size: .95rem; }
.header-links a:hover { color: var(--sky-deep); }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px;
  font: 600 .95rem/1.2 var(--font);
  color: #fff; background: var(--sky-deep);
  border: 2px solid var(--sky-deep); border-radius: 999px;
  text-decoration: none; cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.btn:hover { background: var(--sky-darker); border-color: var(--sky-darker); color: #fff; }
.btn-outline { background: transparent; color: var(--sky-deep); }
.btn-outline:hover { background: var(--mist-2); color: var(--sky-darker); }
.btn-wa { background: var(--wa); border-color: var(--wa); }
.btn-wa:hover { background: #0e6f3b; border-color: #0e6f3b; }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------- 6. Breadcrumb ---------- */
.crumbs { font-size: .85rem; color: var(--muted); padding: 16px 0 0; }
.crumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 8px; }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--line); }
.crumbs a { color: var(--muted); }
.crumbs [aria-current] { color: var(--ink); font-weight: 500; }

/* ---------- 7. Article head ---------- */
.article-head { padding: 20px 0 8px; }
.article-head .kicker {
  display: inline-block; margin: 0 0 12px;
  padding: 4px 12px; font-size: .82rem; font-weight: 600;
  color: var(--sky-darker); background: var(--mist-2); border-radius: 999px;
}
.article-head h1 {
  margin: 0 0 14px; color: var(--ink);
  font-size: clamp(1.75rem, 5.6vw, 2.75rem);
  line-height: 1.15; letter-spacing: -.02em; font-weight: 700;
}
.lede { font-size: 1.15rem; color: var(--text); margin: 0 0 18px; }
.meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px;
  padding: 14px 0; margin-top: 8px;
  border-block: 1px solid var(--line);
  font-size: .9rem; color: var(--muted);
}
.meta strong { color: var(--ink); font-weight: 600; }
.meta .avatar {
  width: 44px; height: 44px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--mist-2); flex: none;
}
.meta-block { display: flex; align-items: center; gap: 10px; }
.meta-block span { display: block; line-height: 1.35; }

/* ---------- 8. Prose ---------- */
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  margin-top: 2.2em; margin-bottom: .4em; color: var(--ink);
  font-size: clamp(1.4rem, 4.2vw, 1.85rem);
  line-height: 1.25; letter-spacing: -.01em; font-weight: 700;
  padding-top: .2em;
}
.prose h3 {
  margin-top: 1.7em; margin-bottom: .3em; color: var(--ink);
  font-size: 1.2rem; line-height: 1.35; font-weight: 700;
}
.prose p { margin-block: 0; }
.prose ul, .prose ol { padding-left: 1.3em; margin-block: 0; }
.prose li + li { margin-top: .45em; }
.prose li::marker { color: var(--sky); font-weight: 700; }
.prose strong { color: var(--ink); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }

/* ---------- 9. Table of contents ---------- */
.toc {
  margin: 24px 0 8px; padding: 18px 20px;
  background: var(--mist); border: 1px solid var(--line); border-radius: var(--radius);
}
.toc-title { margin: 0 0 8px; font-weight: 700; color: var(--ink); font-size: 1rem; }
.toc ol { margin: 0; padding-left: 1.25em; columns: 1; }
.toc li { margin: 4px 0; break-inside: avoid; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

/* ---------- 10. Callouts ---------- */
.callout {
  padding: 16px 18px; border-radius: var(--radius);
  border: 1px solid var(--line); border-left-width: 5px;
  background: var(--mist); border-left-color: var(--sky);
}
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }
.callout-title { display: block; margin-bottom: 6px; font-weight: 700; color: var(--ink); }
.callout-warn   { background: var(--warn-bg);   border-color: #fde3a6; border-left-color: var(--warn-line); }
.callout-warn .callout-title   { color: var(--warn-ink); }
.callout-danger { background: var(--danger-bg); border-color: #fecdd3; border-left-color: var(--danger-line); }
.callout-danger .callout-title { color: var(--danger-ink); }
.callout-ok     { background: var(--ok-bg);     border-color: #a7f3d0; border-left-color: var(--ok-line); }
.callout-ok .callout-title     { color: var(--ok-ink); }

/* ---------- 11. Do / Don't columns ---------- */
.split { display: grid; gap: 14px; }
.split-card { padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--white); }
.split-card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.split-card ul { margin: 0; padding-left: 1.2em; }
.split-do   { border-top: 4px solid var(--ok-line); }
.split-dont { border-top: 4px solid var(--danger-line); }

/* ---------- 12. Tables (stack into cards on phones) ---------- */
.table-wrap { margin-block: 1.4em; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; line-height: 1.5; }
caption { text-align: left; font-weight: 700; color: var(--ink); padding: 0 0 10px; font-size: 1rem; }
th, td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--line); }
thead th { background: var(--ink); color: #fff; font-weight: 600; font-size: .88rem; }
thead th:first-child { border-top-left-radius: var(--radius-sm); }
thead th:last-child  { border-top-right-radius: var(--radius-sm); }
tbody th { color: var(--ink); font-weight: 600; }
tbody tr:nth-child(even) { background: var(--mist); }

/* Phones: each row becomes a labelled card (uses data-label on <td>) */
@media (max-width: 719px) {
  .table-stack thead {
    position: absolute; width: 1px; height: 1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap;
  }
  .table-stack, .table-stack tbody, .table-stack tr, .table-stack th, .table-stack td { display: block; width: 100%; }
  .table-stack tr {
    margin-bottom: 12px; border: 1px solid var(--line);
    border-radius: var(--radius); background: var(--white) !important;
    overflow: hidden;
  }
  .table-stack tbody th {
    background: var(--mist-2); border-bottom: 1px solid var(--line);
    padding: 10px 14px; font-size: 1rem;
  }
  .table-stack td { border-bottom: 1px solid var(--line); padding: 10px 14px; }
  .table-stack td:last-child { border-bottom: 0; }
  .table-stack td::before {
    content: attr(data-label);
    display: block; margin-bottom: 2px;
    font-size: .75rem; font-weight: 700; letter-spacing: .02em;
    color: var(--muted);
  }
}

/* ---------- 13. Numbered steps (only for real sequences) ---------- */
.steps { list-style: none; padding: 0 !important; counter-reset: step; }
.steps > li {
  position: relative; counter-increment: step;
  padding: 2px 0 2px 48px; margin: 0 0 16px !important;
}
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--sky-deep); color: #fff; font-weight: 700; font-size: .95rem;
}
.steps > li::marker { content: none; }
.steps strong { display: block; }

/* ---------- 14. FAQ (native <details>, no JS) ---------- */
.faq { display: grid; gap: 10px; margin-top: 14px; }
.faq details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.faq summary {
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  padding: 15px 18px; font-weight: 600; color: var(--ink); line-height: 1.4;
  min-height: 48px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; flex: none;
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--mist-2); color: var(--sky-darker); font-size: 1.25rem; line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details[open] { border-color: var(--sky); box-shadow: var(--shadow); }
.faq .answer { padding: 0 18px 16px; }
.faq .answer > :first-child { margin-top: 0; }
.faq .answer > :last-child { margin-bottom: 0; }

/* ---------- 15. Location chips ---------- */
.chips { list-style: none; padding: 0 !important; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { margin: 0 !important; }
.chips span {
  display: inline-block; padding: 6px 14px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--mist); color: var(--ink); font-size: .92rem; font-weight: 500;
}

/* ---------- 16. CTA box ---------- */
.cta-box {
  margin-block: 2.4em; padding: 26px 22px;
  background: var(--ink); color: #dbeafe; border-radius: 20px;
}
.cta-box h2, .cta-box h3 { margin: 0 0 8px !important; color: #fff; font-size: 1.4rem; line-height: 1.25; padding: 0; }
.cta-box p { margin: 0 0 16px; color: #cfe3f1; }
.cta-box .cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.cta-box .btn { background: #fff; color: var(--ink); border-color: #fff; }
.cta-box .btn:hover { background: var(--mist-2); border-color: var(--mist-2); color: var(--ink); }
.cta-box .btn-outline { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .55); }
.cta-box .btn-outline:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.cta-box a:not(.btn) { color: #fff; }

/* ---------- 17. Author box ---------- */
.author-box {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px; margin-block: 2em 1em;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--mist);
}
.author-box img { width: 68px; height: 68px; border-radius: 50%; object-fit: cover; flex: none; border: 2px solid #fff; }
.author-box h3 { margin: 0 0 4px !important; font-size: 1.05rem; }
.author-box p { margin: 0; font-size: .95rem; }

.disclaimer { font-size: .85rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 14px; margin-top: 1.6em; }

/* ---------- 18. Related posts ---------- */
.related { margin-block: 2em; display: grid; gap: 12px; }
.related a {
  display: block; padding: 16px 18px; text-decoration: none;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--white);
  color: var(--ink); font-weight: 600;
}
.related a small { display: block; margin-top: 4px; font-weight: 400; color: var(--muted); font-size: .88rem; }
.related a:hover { border-color: var(--sky); box-shadow: var(--shadow); }

/* ---------- 19. Footer ---------- */
.blog-footer { margin-top: 3em; padding: 32px 0 110px; background: var(--mist); border-top: 1px solid var(--line); font-size: .93rem; }
.footer-grid { display: grid; gap: 22px; }
.blog-footer h2 { margin: 0 0 8px; font-size: 1rem; color: var(--ink); }
.blog-footer p, .blog-footer address { margin: 0 0 6px; font-style: normal; line-height: 1.6; }
.blog-footer ul { list-style: none; margin: 0; padding: 0; }
.blog-footer li { margin: 4px 0; }
.footer-legal { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }

/* ---------- 20. Floating call / WhatsApp ---------- */
.float-actions {
  position: fixed; z-index: 90;
  left: 0; right: 0; bottom: 0;
  display: flex; gap: 10px;
  padding: 10px max(14px, env(safe-area-inset-right, 0)) calc(10px + env(safe-area-inset-bottom, 0)) max(14px, env(safe-area-inset-left, 0));
  background: rgba(255, 255, 255, .97);
  border-top: 1px solid var(--line);
  box-shadow: 0 -6px 18px rgba(12, 42, 62, .08);
}
.float-actions .btn { flex: 1; }

/* ---------- 21. Larger screens ---------- */
@media (min-width: 720px) {
  body { font-size: 1.125rem; }
  .header-links { display: flex; }
  .toc ol { columns: 2; column-gap: 28px; }
  .split { grid-template-columns: 1fr 1fr; }
  .related { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .cta-box { padding: 34px 36px; }
  .author-box { padding: 24px; }
  /* Desktop: floating bar becomes a compact corner stack */
  .float-actions {
    left: auto; right: 20px; bottom: 20px;
    flex-direction: column; padding: 0;
    background: transparent; border: 0; box-shadow: none;
  }
  .float-actions .btn { flex: none; box-shadow: var(--shadow); }
  .blog-footer { padding-bottom: 40px; }
}

/* ---------- 22. Print ---------- */
@media print {
  .blog-header, .float-actions, .cta-box, .skip-link { display: none !important; }
  body { font-size: 11pt; color: #000; }
  a { color: #000; text-decoration: none; }
  .faq details:not([open]) .answer { display: block; }
  table, .callout, .split-card { break-inside: avoid; }
}