/*
Theme Name: Portfolio Theme (Xiang Fan)
Theme URI: https://work.xiangfan.ink
Author: Xiang Fan
Description: Minimal portfolio theme styles (Projects / Publications / Talks) with WP menu active highlighting.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: portfolio-theme
*/

:root{
  --page-max: 1180px;
  --pad-x: 20px;
  --text: #111;
  --muted: rgba(0,0,0,.65);
  --hairline: rgba(0,0,0,.18);
  --bg: #fff;

  /* Slightly larger base (+1pt-ish) */
  --font-size: 17px;
  --line: 1.6;

  --btn-pad-y: 10px;
  --btn-pad-x: 14px;
}

*{ margin:0; padding:0; box-sizing:border-box; }
html, body{ height:100%; }
body{
  background:var(--bg);
  color:var(--text);
  font-size:var(--font-size);
  line-height:var(--line);
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial,
    "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
a:hover{ text-decoration:underline; }
hr{ border:0; border-top:1px solid var(--hairline); margin:28px 0; }

/* Container */
.site,
main,
.site-main{
  max-width:var(--page-max);
  margin:0 auto;
  padding:0 var(--pad-x);
}

/* Header + Navigation */
.site-header{
  padding:42px 0 26px;
}

.site-title{
  font-size:28px;
  font-weight:500;
  letter-spacing:.2px;
  margin:0 0 18px;
}

.main-navigation{
  margin-bottom: 10px;
}

.main-navigation ul,
.main-navigation .nav-menu{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:20px;
}

.main-navigation a{
  font-size:16px;
  opacity:.9;
  padding:2px 0;
  text-decoration:none;
}
.main-navigation a:hover{ text-decoration:underline; }

/* Active nav highlighting (WP menu classes) */
.main-navigation .nav-menu > li > a{
  font-weight:400;
}
.main-navigation .nav-menu > li.current-menu-item > a,
.main-navigation .nav-menu > li.current-menu-ancestor > a,
.main-navigation .nav-menu > li.current-menu-parent > a{
  font-weight:700 !important;
  opacity:1 !important;
}

/* Fallback: your taxonomy URLs */
body.single-publication .main-navigation a[href$="/type/publications/"]{
  font-weight:700 !important;
  opacity:1 !important;
}
body.single-project .main-navigation a[href$="/type/projects/"]{
  font-weight:700 !important;
  opacity:1 !important;
}
body.single-talk .main-navigation a[href$="/type/talks/"]{
  font-weight:700 !important;
  opacity:1 !important;
}

/* Buttons */
.xf-publication-actions a,
.xf-talk-actions a,
.button,
.wp-block-button__link{
  display:inline-block;
  padding:var(--btn-pad-y) var(--btn-pad-x);
  border:1px solid currentColor;
  text-decoration:none !important;
  font-size:16px;
  line-height:1;
  background:transparent;
}

.xf-publication-actions a:hover,
.xf-talk-actions a:hover,
.button:hover,
.wp-block-button__link:hover{
  text-decoration:none !important;
  opacity:.78;
}

/* Typography */
h1,h2,h3{
  font-weight:600;
  line-height:1.15;
  margin: 0 0 14px;
}

h1{ font-size:clamp(34px, 4vw, 52px); }
h2{ font-size:clamp(22px, 2.4vw, 30px); }
h3{ font-size:clamp(18px, 2vw, 22px); }

p{ margin:0 0 14px; }
small, .muted{ color:var(--muted); }

/* Projects grid (homepage) - ratio 1:2.6 => aspect-ratio 2.6/1 */
.projects-grid{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap:16px;
  margin: 26px 0 40px;
}

@media (max-width: 1020px){
  .projects-grid{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 760px){
  .projects-grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 520px){
  .projects-grid{ grid-template-columns: 1fr; }
}

.project-card,
.projects-grid > a{
  display:block;
  border:1px solid var(--hairline);
  background:#fff;
}

.project-card .thumb,
.projects-grid > a .thumb,
.projects-grid > a .project-thumb{
  width:100%;
  aspect-ratio: 2.6 / 1;
  background:#f7f7f7;
  overflow:hidden;
}

.project-card .thumb img,
.projects-grid > a .thumb img,
.projects-grid > a .project-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.project-card .meta,
.projects-grid > a .meta{
  padding:10px 12px 12px;
  font-size:15px;
  line-height:1.4;
}

.project-card .meta .title,
.projects-grid > a .meta .title{
  font-weight:600;
}

.project-card .meta .subtitle,
.projects-grid > a .meta .subtitle{
  margin-top:4px;
  color:var(--muted);
}

/* Footer */
.site-footer{
  margin-top:54px;
  padding:24px 0 42px;
  color:var(--muted);
  border-top:1px solid var(--hairline);
  font-size:14px;
}
/* ===== HARD FORCE ACTIVE NAV (based on current URL via body classes fallback) ===== */
/* 1) Taxonomy archive pages: /type/projects/ /type/publications/ /type/talks/  */
body[class*="term-publications"] a[href*="/type/publications/"],
body[class*="term-projects"] a[href*="/type/projects/"],
body[class*="term-talks"] a[href*="/type/talks/"]{
  font-weight: 700 !important;
}

/* 2) Single CPT pages: single-publication / single-project / single-talk */
body.single-publication a[href*="/type/publications/"],
body.single-project a[href*="/type/projects/"],
body.single-talk a[href*="/type/talks/"]{
  font-weight: 700 !important;
}

/* 3) If your theme wraps nav in .main-navigation, boost specificity */
body[class*="term-publications"] .main-navigation a[href*="/type/publications/"],
body[class*="term-projects"] .main-navigation a[href*="/type/projects/"],
body[class*="term-talks"] .main-navigation a[href*="/type/talks/"],
body.single-publication .main-navigation a[href*="/type/publications/"],
body.single-project .main-navigation a[href*="/type/projects/"],
body.single-talk .main-navigation a[href*="/type/talks/"]{
  font-weight: 700 !important;
}