/*
Theme Name: MTT Index
Description: Academic reference theme for subject-wise thesis topic pages. Single-column, index-style numbering, FAQ accordion, Rank Math compatible.
Version: 1.0.1
Requires at least: 6.0
Tested up to: 6.8
Requires PHP: 7.4
License: GPLv2 or later
Text Domain: mtt-index
*/

/* ---------------------------------------------------------------
   Tokens
   --------------------------------------------------------------- */
:root{
  --paper:#FBFBF9;
  --tint:#EEF2F1;
  --ink:#14303A;
  --ink-soft:#4C6069;
  --ink-faint:#7A8B92;
  --rule:#DCE3E2;
  --accent:#8C2F39;

  --serif:"Spectral",Georgia,"Times New Roman",serif;
  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;

  --measure:37rem;
  --gutter:3.25rem;
  --cta-space:6rem;      /* reserved for the floating CTA */
}

/* ---------------------------------------------------------------
   Base
   --------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--serif);
  font-size:1.0625rem;
  line-height:1.68;
  font-weight:400;
  padding-bottom:var(--cta-space);
  -webkit-font-smoothing:antialiased;
}

a{color:var(--ink);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.18em;text-decoration-color:var(--rule)}
a:hover{text-decoration-color:var(--accent)}
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

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

.mtt-wrap{width:100%;max-width:var(--measure);margin:0 auto;padding:0 1.375rem}

.mtt-skip{position:absolute;left:-9999px}
.mtt-skip:focus{left:1rem;top:1rem;z-index:99;background:var(--ink);color:var(--paper);padding:.6rem 1rem}

/* ---------------------------------------------------------------
   Masthead
   --------------------------------------------------------------- */
.mtt-masthead{border-bottom:1px solid var(--rule);background:var(--paper)}
.mtt-masthead-inner{
  max-width:var(--measure);margin:0 auto;padding:1.1rem 1.375rem;
  display:flex;align-items:baseline;justify-content:space-between;gap:1rem}
.mtt-brand{
  font-family:var(--sans);font-weight:600;font-size:.9375rem;
  letter-spacing:.02em;text-decoration:none;color:var(--ink)}
.mtt-brand span{color:var(--accent)}
.mtt-nav{font-family:var(--sans);font-size:.75rem;letter-spacing:.09em;text-transform:uppercase}
.mtt-nav .mtt-nav-list{
  list-style:none;margin:0;padding:0;
  display:flex;flex-wrap:wrap;align-items:baseline;gap:1.35rem}
.mtt-nav .mtt-nav-list li{margin:0;padding:0;list-style:none}
.mtt-nav .mtt-nav-list li::marker{content:""}
.mtt-nav a{color:var(--ink-soft);text-decoration:none;display:inline-block}
.mtt-nav a:hover{color:var(--accent)}
.mtt-nav .current-menu-item > a{color:var(--ink)}

/* ---------------------------------------------------------------
   Breadcrumb
   --------------------------------------------------------------- */
.mtt-crumbs{
  font-family:var(--sans);font-size:.75rem;letter-spacing:.05em;
  color:var(--ink-faint);padding:1.5rem 0 0}
.mtt-crumbs a{color:var(--ink-faint);text-decoration:none}
.mtt-crumbs a:hover{color:var(--accent)}
.mtt-crumbs .separator{padding:0 .4em;color:var(--rule)}

/* ---------------------------------------------------------------
   Page head
   --------------------------------------------------------------- */
.mtt-head{padding:1.75rem 0 0}

.mtt-eyebrow{
  font-family:var(--sans);font-size:.6875rem;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--accent);
  margin:0 0 .85rem}

.mtt-title{
  font-family:var(--serif);font-weight:600;font-size:clamp(1.95rem,5.4vw,2.85rem);
  line-height:1.14;letter-spacing:-.015em;margin:0}

.mtt-standfirst{
  font-family:var(--sans);font-size:.8125rem;letter-spacing:.03em;
  color:var(--ink-faint);margin:1.05rem 0 0;
  padding-top:1.05rem;border-top:1px solid var(--rule)}
.mtt-standfirst b{font-weight:600;color:var(--ink-soft)}

/* ---------------------------------------------------------------
   Body copy
   --------------------------------------------------------------- */
.mtt-body{padding:1.9rem 0 0}
.mtt-body > p{margin:0 0 1.15rem}
.mtt-body > p:first-child{font-size:1.125rem;line-height:1.62}

.mtt-body h2{
  font-family:var(--serif);font-weight:600;font-size:1.4rem;line-height:1.25;
  letter-spacing:-.01em;margin:3rem 0 1.15rem}

/* ---------------------------------------------------------------
   Signature: the topic index
   --------------------------------------------------------------- */
.mtt-topics{
  list-style:none;margin:2.1rem 0 0;padding:0 0 0 var(--gutter);
  border-left:1px solid var(--rule);counter-reset:mtt}

.mtt-topics li{
  counter-increment:mtt;position:relative;
  padding:.95rem 0 .95rem .1rem;
  border-bottom:1px solid var(--rule);
  font-size:1.0625rem;line-height:1.6}
.mtt-topics li:last-child{border-bottom:0}

.mtt-topics li::before{
  content:counter(mtt,decimal-leading-zero);
  position:absolute;left:calc(-1 * var(--gutter));width:calc(var(--gutter) - .9rem);
  top:1.12rem;text-align:right;
  font-family:var(--sans);font-size:.75rem;font-weight:600;
  font-variant-numeric:tabular-nums;letter-spacing:.04em;
  color:var(--accent)}

.mtt-topics li::after{
  content:"";position:absolute;left:calc(-1 * var(--gutter) + .1rem);
  top:1.5rem;width:.55rem;height:1px;background:var(--rule)}

/* ---------------------------------------------------------------
   FAQ
   --------------------------------------------------------------- */
.mtt-faq{margin:1.4rem 0 0}

.mtt-faq-item{border-bottom:1px solid var(--rule)}
.mtt-faq-item:first-child{border-top:1px solid var(--rule)}

.mtt-faq-item > summary{
  cursor:pointer;list-style:none;display:flex;gap:1rem;
  align-items:flex-start;justify-content:space-between;
  padding:1rem 0;
  font-family:var(--serif);font-weight:600;font-size:1.0625rem;line-height:1.45}
.mtt-faq-item > summary::-webkit-details-marker{display:none}

.mtt-faq-item > summary::after{
  content:"";flex:0 0 auto;width:.6rem;height:.6rem;margin-top:.45rem;
  border-right:1.5px solid var(--accent);border-bottom:1.5px solid var(--accent);
  transform:rotate(45deg);transition:transform .18s ease}
.mtt-faq-item[open] > summary::after{transform:rotate(-135deg)}

.mtt-faq-answer{padding:0 0 1.1rem;color:var(--ink-soft);font-size:1rem}
.mtt-faq-answer p{margin:0 0 .8rem}
.mtt-faq-answer p:last-child{margin-bottom:0}

.mtt-faq-open .mtt-faq-item > summary{font-weight:600}

/* Common FAQ block sits on a tint so it reads as site furniture */
.mtt-faq-common{
  margin:3rem 0 0;padding:1.75rem 1.5rem 1.9rem;
  background:var(--tint);border-radius:3px}
.mtt-faq-common h2{margin-top:0;font-size:1.25rem}
.mtt-faq-common .mtt-faq-item{border-color:#DAE2E0}
.mtt-faq-common .mtt-faq-item:first-child{border-top-color:#DAE2E0}
.mtt-faq-common .mtt-faq-item > summary{font-size:1rem}

/* ---------------------------------------------------------------
   Related
   --------------------------------------------------------------- */
.mtt-related{margin:3rem 0 0;padding-top:1.6rem;border-top:2px solid var(--ink)}
.mtt-related h2{
  font-family:var(--sans);font-size:.6875rem;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint);margin:0 0 1rem}
.mtt-related ul{list-style:none;margin:0;padding:0}
.mtt-related li{border-bottom:1px solid var(--rule)}
.mtt-related li:last-child{border-bottom:0}
.mtt-related a{
  display:block;padding:.8rem 0;text-decoration:none;
  font-size:1.0625rem;line-height:1.4}
.mtt-related a:hover{color:var(--accent)}

/* ---------------------------------------------------------------
   Hub / archive grid
   --------------------------------------------------------------- */
.mtt-index-list{list-style:none;margin:2rem 0 0;padding:0;
  columns:2;column-gap:2rem}
.mtt-index-list li{break-inside:avoid;padding:.4rem 0;font-size:.9375rem}

/* ---------------------------------------------------------------
   Footer
   --------------------------------------------------------------- */
.mtt-footer{
  margin-top:4.5rem;border-top:1px solid var(--rule);background:var(--tint)}
.mtt-footer-inner{
  max-width:var(--measure);margin:0 auto;padding:2.25rem 1.375rem 2.6rem;
  font-family:var(--sans);font-size:.8125rem;color:var(--ink-soft)}
.mtt-footer-inner p{margin:0 0 .7rem}
.mtt-footer-links{margin:0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:1.1rem}
.mtt-footer-links a{text-decoration:none;color:var(--ink-soft)}
.mtt-footer-links a:hover{color:var(--accent)}
.mtt-updated{
  font-size:.75rem;color:var(--ink-faint);letter-spacing:.03em;
  margin-top:1.4rem;padding-top:1rem;border-top:1px solid var(--rule)}

/* ---------------------------------------------------------------
   Responsive
   --------------------------------------------------------------- */
@media (max-width:600px){
  :root{--gutter:2.4rem}
  body{font-size:1.03125rem}
  .mtt-topics li{font-size:1.03125rem;padding-top:.85rem;padding-bottom:.85rem}
  .mtt-topics li::before{font-size:.6875rem}
  .mtt-index-list{columns:1}
  .mtt-faq-common{padding:1.5rem 1.15rem 1.6rem;margin-left:-.25rem;margin-right:-.25rem}
  .mtt-nav .mtt-nav-list{gap:.9rem}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

@media print{
  body{padding-bottom:0;background:#fff}
  .mtt-masthead,.mtt-related,.mtt-faq-common,.mtt-footer{display:none}
  .mtt-topics{border-left:0}
}