/*
Theme Name: ELSA
Theme URI: https://thisiselsa.com/
Author: English Language Success Academy
Author URI: https://thisiselsa.com/
Description: A custom-built theme for English Language Success Academy - a content-first publication for English learners preparing for academic, professional, and exam contexts (IELTS, TOEFL, PTE, TOEIC). Built from scratch with no third-party remote dependencies.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: GPLv2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: elsa-theme
*/

/* ============================================================
   DESIGN TOKENS
   ============================================================ */

:root {
  /* Color */
  --ink: #1A2B3D;
  --ink-soft: #2E4258;
  --paper: #FAF8F3;
  --paper-dim: #F0ECE3;
  --coral: #E0735C;
  --coral-dark: #C25A45;
  --sage: #7C9885;
  --sage-dark: #5F7A68;
  --muted: #5C6B7A;
  --line: rgba(26, 43, 61, 0.12);
  --line-soft: rgba(26, 43, 61, 0.07);
  --white: #FFFFFF;

  /* Type */
  --font-display: 'Lora', Georgia, serif;
  --font-body: 'Source Sans 3', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --content-width: 700px;
  --sidebar-width: 300px;
  --wrap-width: 1120px;
  --radius: 4px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--coral-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: var(--coral); color: var(--white); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  max-width: var(--wrap-width);
  margin: 0 auto;
  padding: 0 28px;
}
@media (max-width: 600px) {
  .wrap { padding: 0 20px; }
}

.screen-reader-text {
  position: absolute !important;
  clip: rect(1px, 1px, 1px, 1px);
  width: 1px; height: 1px;
  overflow: hidden;
}

/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(250, 248, 243, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
  gap: 28px;
}
.site-branding {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-branding a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
  text-decoration: none;
}
.site-branding .mark {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--coral);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
  flex-shrink: 0;
}
.site-branding .site-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.site-branding .site-tagline {
  display: block;
  font-size: 11px;
  color: rgba(250, 248, 243, 0.55);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 1px;
}

/* primary nav */
.primary-nav { flex: 1; min-width: 0; }
.primary-nav ul.menu {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.primary-nav ul.menu li { position: relative; }
.primary-nav ul.menu > li > a {
  display: block;
  padding: 10px 13px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(250, 248, 243, 0.78);
  text-decoration: none;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}
.primary-nav ul.menu > li > a:hover,
.primary-nav ul.menu > li.menu-item-has-children:hover > a {
  color: var(--paper);
  background: rgba(250, 248, 243, 0.08);
}
.primary-nav ul.menu > li.menu-item-has-children > a::after {
  content: "";
  display: inline-block;
  width: 5px; height: 5px;
  margin-left: 5px;
  margin-bottom: 1px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.6;
}
.primary-nav ul.sub-menu {
  list-style: none;
  margin: 0;
  padding: 8px;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--ink-soft);
  border: 1px solid rgba(250, 248, 243, 0.1);
  border-radius: 6px;
  box-shadow: 0 16px 32px -12px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
  z-index: 50;
}
.primary-nav li.menu-item-has-children:hover > ul.sub-menu,
.primary-nav li.menu-item-has-children:focus-within > ul.sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.primary-nav ul.sub-menu li { width: 100%; }
.primary-nav ul.sub-menu a {
  display: block;
  padding: 9px 12px;
  font-size: 13.5px;
  color: rgba(250, 248, 243, 0.82);
  border-radius: 4px;
  white-space: normal;
  line-height: 1.4;
  transition: background 0.15s ease, color 0.15s ease;
}
.primary-nav ul.sub-menu a:hover {
  background: rgba(224, 115, 92, 0.15);
  color: var(--coral);
}

.header-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--paper);
  cursor: pointer;
  padding: 8px;
}
.header-search {
  flex-shrink: 0;
}
.header-search form {
  display: flex;
  align-items: center;
  background: rgba(250, 248, 243, 0.08);
  border: 1px solid rgba(250, 248, 243, 0.14);
  border-radius: 20px;
  padding: 6px 6px 6px 14px;
}
.header-search input[type="search"] {
  background: none;
  border: none;
  color: var(--paper);
  font-size: 13.5px;
  width: 130px;
  outline: none;
}
.header-search input[type="search"]::placeholder { color: rgba(250, 248, 243, 0.45); }
.header-search button {
  background: var(--coral);
  border: none;
  color: var(--ink);
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

@media (max-width: 880px) {
  .primary-nav { display: none; }
  .header-menu-toggle { display: block; }
  .header-search form { padding: 5px 5px 5px 10px; }
  .header-search input[type="search"] { width: 90px; }
}

/* mobile menu drawer */
.mobile-nav {
  display: none;
  background: var(--ink-soft);
  border-top: 1px solid rgba(250, 248, 243, 0.1);
}
.mobile-nav.is-open { display: block; }
.mobile-nav ul { list-style: none; margin: 0; padding: 10px 0; }
.mobile-nav ul ul { padding-left: 16px; }
.mobile-nav a {
  display: block;
  padding: 11px 28px;
  color: rgba(250, 248, 243, 0.85);
  font-size: 14.5px;
  border-bottom: 1px solid rgba(250, 248, 243, 0.06);
}

/* ============================================================
   TRENDING STRIP
   ============================================================ */

.trending-strip {
  background: var(--paper-dim);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.trending-strip .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.trending-strip .label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--coral-dark);
  font-weight: 600;
  flex-shrink: 0;
}
.trending-strip .tags {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.trending-strip .tags::-webkit-scrollbar { display: none; }
.trending-strip .tags a {
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}
.trending-strip .tags a:hover { color: var(--coral-dark); border-color: var(--coral); text-decoration: none; }

/* ============================================================
   LAYOUT (content + sidebar)
   ============================================================ */

.site-main { padding: 48px 0 80px; }
@media (max-width: 600px) { .site-main { padding: 32px 0 56px; } }

.layout-with-sidebar {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 56px;
  align-items: start;
}
@media (max-width: 920px) {
  .layout-with-sidebar { grid-template-columns: 1fr; gap: 40px; }
}

/* ============================================================
   ARTICLE CARDS (archive/index grids)
   ============================================================ */

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
@media (max-width: 600px) { .article-grid { grid-template-columns: 1fr; } }

.article-card {
  display: flex;
  flex-direction: column;
}
.article-card .thumb {
  aspect-ratio: 16/10;
  background: var(--ink-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 14px;
}
.article-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-card .cat-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sage-dark);
  margin-bottom: 8px;
  display: inline-block;
}
.article-card h2, .article-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 8px;
}
.article-card h2 a, .article-card h3 a { color: var(--ink); text-decoration: none; }
.article-card h2 a:hover, .article-card h3 a:hover { color: var(--coral-dark); }
.article-card .excerpt {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin: 0 0 10px;
}
.article-card .meta {
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.featured-article {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 760px) { .featured-article { grid-template-columns: 1fr; gap: 22px; } }
.featured-article .thumb { aspect-ratio: 4/3; border-radius: 6px; overflow: hidden; background: var(--ink-soft); }
.featured-article .thumb img { width: 100%; height: 100%; object-fit: cover; }
.featured-article h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 12px;
}
.featured-article h2 a { color: var(--ink); }
.featured-article .excerpt { font-size: 16px; color: var(--muted); line-height: 1.65; }

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 26px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink);
}
.section-heading h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin: 0;
}
.section-heading a.see-all {
  font-size: 13px;
  color: var(--coral-dark);
  font-weight: 500;
}

/* ============================================================
   SINGLE ARTICLE — signature annotation margin
   ============================================================ */

.single-article-header { max-width: var(--content-width); margin: 0 auto 36px; }
.single-article-header .cat-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--sage-dark);
  margin-bottom: 14px;
  display: inline-block;
}
.single-article-header h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}
.single-article-header .meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--muted);
}
.single-article-header .meta img {
  width: 26px; height: 26px;
  border-radius: 50%;
}
.single-article-header .featured-image {
  margin-top: 28px;
  border-radius: 6px;
  overflow: hidden;
}

/* The signature element: an annotated margin rule running beside
   the body copy, with small coral tick marks - evokes a teacher's
   marginal notes on a student's page, tying the device directly to
   "content meant to be studied," not decoration for its own sake. */
.article-body {
  max-width: var(--content-width);
  margin: 0 auto;
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--line);
}
@media (max-width: 600px) { .article-body { padding-left: 18px; } }

.article-body p, .article-body ul, .article-body ol, .article-body blockquote {
  margin: 0 0 22px;
  position: relative;
}
.article-body p:first-of-type::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--coral);
}
@media (max-width: 600px) { .article-body p:first-of-type::before { left: -20px; } }

.article-body h2 {
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 600;
  margin: 44px 0 18px;
  position: relative;
}
.article-body h2::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 10px;
  width: 6px; height: 6px;
  background: var(--coral);
}
@media (max-width: 600px) { .article-body h2::before { left: -20px; } }
.article-body h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 14px;
}
.article-body img { border-radius: 6px; margin: 28px 0; }
.article-body blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 19px;
  color: var(--ink-soft);
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--coral);
  margin-left: -22px;
}
.article-body a { text-decoration: underline; text-decoration-color: var(--coral); text-decoration-thickness: 1px; }
.article-body ul, .article-body ol { padding-left: 22px; color: var(--ink); }
.article-body li { margin-bottom: 8px; }
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--paper-dim);
  padding: 2px 6px;
  border-radius: 3px;
}

.article-tags {
  max-width: var(--content-width);
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.article-tags a {
  font-size: 12.5px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 5px 12px;
}
.article-tags a:hover { color: var(--coral-dark); border-color: var(--coral); text-decoration: none; }

.author-box {
  max-width: var(--content-width);
  margin: 36px auto 0;
  padding: 22px 24px;
  background: var(--paper-dim);
  border-radius: 6px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.author-box img { width: 48px; height: 48px; border-radius: 50%; flex-shrink: 0; }
.author-box .name { font-family: var(--font-display); font-weight: 600; font-size: 15px; margin-bottom: 3px; }
.author-box .bio { font-size: 13.5px; color: var(--muted); line-height: 1.55; }

/* ============================================================
   SIDEBAR
   ============================================================ */

.sidebar { font-size: 14.5px; }
.widget { margin-bottom: 40px; }
.widget-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--coral-dark);
  font-weight: 600;
  margin: 0 0 16px;
}
.widget ul { list-style: none; margin: 0; padding: 0; }
.widget li { border-top: 1px solid var(--line); }
.widget li:first-child { border-top: none; }
.widget li a {
  display: block;
  padding: 11px 0;
  color: var(--ink);
  font-size: 14px;
}
.widget li a:hover { color: var(--coral-dark); text-decoration: none; }
.widget .search-form {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.widget .search-form input[type="search"] {
  flex: 1;
  border: none;
  padding: 11px 14px;
  font-size: 14px;
  outline: none;
  font-family: var(--font-body);
}
.widget .search-form button {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 0 18px;
  cursor: pointer;
  font-size: 13px;
}

.widget-card {
  background: var(--ink);
  color: var(--paper);
  border-radius: 6px;
  padding: 24px 22px;
}
.widget-card .widget-title { color: var(--coral); }
.widget-card p { font-size: 13.5px; color: rgba(250, 248, 243, 0.75); line-height: 1.6; margin-bottom: 16px; }
.widget-card a.btn {
  display: inline-block;
  background: var(--coral);
  color: var(--ink);
  font-weight: 600;
  font-size: 13.5px;
  padding: 10px 18px;
  border-radius: 4px;
}
.widget-card a.btn:hover { background: #eb8d78; text-decoration: none; }

/* ============================================================
   PAGINATION
   ============================================================ */

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}
.pagination a, .pagination span {
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13.5px;
  color: var(--ink);
}
.pagination a:hover { border-color: var(--coral); color: var(--coral-dark); text-decoration: none; }
.pagination .current { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--ink);
  color: rgba(250, 248, 243, 0.7);
  padding: 56px 0 28px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h5 {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--coral);
  margin: 0 0 16px;
}
.footer-brand .site-title { font-family: var(--font-display); font-size: 17px; font-weight: 600; color: var(--paper); margin-bottom: 10px; }
.footer-brand p { font-size: 13px; color: rgba(250, 248, 243, 0.55); line-height: 1.65; max-width: 280px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { font-size: 13.5px; color: rgba(250, 248, 243, 0.65); }
.footer-grid a:hover { color: var(--coral); text-decoration: none; }
.footer-contact p { font-size: 13.5px; color: rgba(250, 248, 243, 0.65); margin: 0 0 10px; line-height: 1.5; }
.footer-bottom {
  border-top: 1px solid rgba(250, 248, 243, 0.12);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12.5px;
  color: rgba(250, 248, 243, 0.45);
}
.footer-bottom a { color: rgba(250, 248, 243, 0.45); }
.footer-bottom a:hover { color: var(--coral); }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(250, 248, 243, 0.08);
  display: flex; align-items: center; justify-content: center;
  color: rgba(250, 248, 243, 0.7);
}
.footer-social a:hover { background: var(--coral); color: var(--ink); }

/* ============================================================
   404 / SEARCH EMPTY STATE
   ============================================================ */

.empty-state {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: 40px 0;
}
.empty-state .icon { font-size: 40px; margin-bottom: 18px; }
.empty-state h1 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 12px;
}
.empty-state p { color: var(--muted); font-size: 15.5px; margin-bottom: 28px; }

/* ============================================================
   POST NAVIGATION (prev/next) + page-links
   ============================================================ */

.post-navigation, .navigation.post-navigation {
  max-width: var(--content-width);
  margin: 48px auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}
.post-navigation .nav-links { display: contents; }
.post-navigation .nav-previous, .post-navigation .nav-next {
  display: block;
}
.post-navigation .nav-next { text-align: right; }
.post-navigation a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
}
.post-navigation a:hover { border-color: var(--coral); }
.post-navigation .nav-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--coral-dark);
  margin-bottom: 6px;
}
.post-navigation .nav-title {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}
@media (max-width: 600px) {
  .post-navigation, .navigation.post-navigation { grid-template-columns: 1fr; }
  .post-navigation .nav-next { text-align: left; }
}

.page-links {
  max-width: var(--content-width);
  margin: 24px auto;
  font-size: 13.5px;
  color: var(--muted);
}
.page-links a {
  display: inline-block;
  margin: 0 4px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
}