/*
Theme Name: Beta Math Archipelago Modern
Theme URI: https://beta-math.id/
Author: Beta Math Archipelago
Description: Tema modern akademik untuk Beta Math Archipelago: Publisher dan Press.
Version: 1.3.0
Text Domain: beta-math
*/

:root{
  --bm-red:#B4232D;
  --bm-red-dark:#7F1D1D;
  --bm-red-soft:#FDEBEC;
  --bm-ink:#1F2937;
  --bm-muted:#667085;
  --bm-bg:#FAFAF9;
  --bm-card:#FFFFFF;
  --bm-line:#E8E8E6;
  --bm-dark:#171717;
  --bm-radius:22px;
  --bm-shadow:0 18px 50px rgba(31,41,55,.08);
  --bm-container:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--bm-ink);
  background:var(--bm-bg);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
.bm-container{width:min(calc(100% - 40px),var(--bm-container));margin:auto}
.bm-section{padding:88px 0}
.bm-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border-radius:999px;
  background:var(--bm-red-soft);color:var(--bm-red-dark);
  font-size:12px;font-weight:800;letter-spacing:.09em;text-transform:uppercase
}
.bm-section-title{max-width:760px;margin:14px 0 12px;font-size:clamp(30px,4vw,48px);line-height:1.1;letter-spacing:-.03em}
.bm-section-lead{max-width:760px;color:var(--bm-muted);font-size:18px;margin:0}
.bm-header{
  position:sticky;top:0;z-index:50;
  background:rgba(250,250,249,.92);
  border-bottom:1px solid rgba(232,232,230,.9);
  backdrop-filter:blur(14px);
}
body.admin-bar .bm-header{top:32px}
.bm-nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.bm-brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:-.03em}
.bm-brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--bm-red),var(--bm-red-dark));
  display:grid;place-items:center;color:white;font-weight:900
}
.bm-brand-text strong{display:block;font-size:18px;line-height:1}
.bm-brand-text span{display:block;font-size:11px;color:var(--bm-muted);font-weight:700;margin-top:4px;letter-spacing:.05em}
.bm-menu{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:700}
.bm-menu a{transition:.2s}
.bm-menu a:hover{color:var(--bm-red)}
.bm-menu .bm-nav-cta{
  color:#fff;background:var(--bm-red);padding:11px 16px;border-radius:12px
}
.bm-mobile-toggle{display:none;background:none;border:0;font-size:28px;cursor:pointer}

.bm-hero{position:relative;overflow:hidden;padding:86px 0 74px}
.bm-hero:before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  right:-180px;top:-240px;background:radial-gradient(circle,rgba(180,35,45,.16),transparent 68%)
}
.bm-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:64px}
.bm-hero h1{font-size:clamp(46px,6vw,78px);line-height:.99;letter-spacing:-.055em;margin:18px 0 22px}
.bm-hero h1 .accent{color:var(--bm-red)}
.bm-hero p{font-size:19px;color:var(--bm-muted);max-width:670px}
.bm-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.bm-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 18px;border-radius:13px;font-weight:800;font-size:14px;transition:.2s
}
.bm-btn-primary{background:var(--bm-red);color:#fff;box-shadow:0 12px 28px rgba(180,35,45,.18)}
.bm-btn-primary:hover{background:var(--bm-red-dark);transform:translateY(-1px)}
.bm-btn-secondary{background:#fff;border:1px solid var(--bm-line)}
.bm-btn-secondary:hover{border-color:#d4d4d2;transform:translateY(-1px)}

.bm-math-card{
  min-height:430px;border-radius:32px;padding:30px;position:relative;overflow:hidden;
  background:linear-gradient(150deg,#211012 0%,#7F1D1D 50%,#B4232D 100%);
  color:#fff;box-shadow:0 30px 70px rgba(127,29,29,.25)
}
.bm-math-grid{
  position:absolute;inset:0;opacity:.14;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:44px 44px
}
.bm-formula{position:absolute;font-family:Georgia,serif;color:rgba(255,255,255,.92)}
.bm-f1{font-size:42px;top:60px;left:40px}.bm-f2{font-size:28px;right:35px;top:155px}.bm-f3{font-size:34px;left:65px;bottom:90px}
.bm-math-caption{position:absolute;left:30px;right:30px;bottom:28px;padding-top:20px;border-top:1px solid rgba(255,255,255,.25)}
.bm-math-caption strong{font-size:18px}.bm-math-caption span{display:block;color:rgba(255,255,255,.72);font-size:13px;margin-top:4px}

.bm-pillar-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:36px}
.bm-pillar{
  background:var(--bm-card);border:1px solid var(--bm-line);border-radius:var(--bm-radius);
  padding:34px;box-shadow:var(--bm-shadow);transition:.2s
}
.bm-pillar:hover{transform:translateY(-3px);border-color:#efc4c7}
.bm-icon{
  width:48px;height:48px;border-radius:15px;display:grid;place-items:center;
  background:var(--bm-red-soft);color:var(--bm-red);font-size:23px;font-weight:900
}
.bm-pillar h3{font-size:27px;margin:18px 0 10px;letter-spacing:-.025em}
.bm-pillar p{color:var(--bm-muted);margin:0 0 18px}
.bm-link{color:var(--bm-red);font-weight:800}

.bm-journal-wrap{background:#fff;border-top:1px solid var(--bm-line);border-bottom:1px solid var(--bm-line)}
.bm-journal{
  display:grid;grid-template-columns:.42fr 1fr;gap:34px;align-items:center;
  margin-top:34px;background:var(--bm-bg);border:1px solid var(--bm-line);
  border-radius:28px;padding:30px
}
.bm-journal-cover{
  aspect-ratio:4/5;border-radius:20px;padding:28px;position:relative;overflow:hidden;
  background:linear-gradient(160deg,#fff 0%,#f8d7da 35%,#b4232d 100%);
  border:1px solid #f2c4c8
}
.bm-journal-cover:after{
  content:"β";position:absolute;right:18px;bottom:-42px;font-family:Georgia,serif;
  font-size:190px;color:rgba(255,255,255,.3);line-height:1
}
.bm-journal-cover small{font-weight:900;letter-spacing:.08em;color:var(--bm-red-dark)}
.bm-journal-cover h3{font-size:30px;line-height:1.05;margin:25px 0 12px;letter-spacing:-.04em}
.bm-journal-cover p{font-size:13px;margin:0;max-width:220px}
.bm-journal-info h3{font-size:34px;line-height:1.15;margin:8px 0 12px;letter-spacing:-.035em}
.bm-meta{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0 24px}
.bm-chip{font-size:12px;font-weight:800;padding:7px 10px;border-radius:999px;background:#fff;border:1px solid var(--bm-line);color:#52525b}
.bm-journal-info p{color:var(--bm-muted)}

.bm-category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px}
.bm-category{background:#fff;border:1px solid var(--bm-line);border-radius:18px;padding:24px}
.bm-category h4{font-size:18px;margin:14px 0 7px}
.bm-category p{font-size:14px;color:var(--bm-muted);margin:0}

.bm-about-band{
  border-radius:30px;padding:52px;
  background:linear-gradient(135deg,#201415,#3b1518 55%,#7F1D1D);color:#fff
}
.bm-about-band p{color:rgba(255,255,255,.72);max-width:780px;font-size:18px}
.bm-footer{background:var(--bm-dark);color:#fff;padding:58px 0 28px;margin-top:72px}
.bm-footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:40px}
.bm-footer p,.bm-footer a{color:#b7b7b7;font-size:14px}
.bm-footer h4{margin-top:0}
.bm-copyright{border-top:1px solid #303030;margin-top:40px;padding-top:20px;color:#8e8e8e;font-size:13px}

.bm-page-hero{padding:70px 0 36px}
.bm-page-content{padding:10px 0 80px}
.bm-content-card{background:#fff;border:1px solid var(--bm-line);border-radius:22px;padding:34px;box-shadow:var(--bm-shadow)}
.entry-content h2{font-size:30px;letter-spacing:-.025em;margin-top:35px}.entry-content p{color:#52525b}

@media(max-width:900px){
  .bm-menu{display:none;position:absolute;left:20px;right:20px;top:70px;background:#fff;border:1px solid var(--bm-line);border-radius:18px;padding:20px;flex-direction:column;align-items:flex-start;box-shadow:var(--bm-shadow)}
  .bm-menu.is-open{display:flex}
  .bm-mobile-toggle{display:block}
  .bm-hero-grid,.bm-journal{grid-template-columns:1fr}
  .bm-pillar-grid{grid-template-columns:1fr}
  .bm-category-grid{grid-template-columns:1fr 1fr}
  .bm-footer-grid{grid-template-columns:1fr}
}
@media(max-width:600px){
  .bm-container{width:min(calc(100% - 28px),var(--bm-container))}
  .bm-section{padding:64px 0}
  .bm-hero{padding:56px 0 54px}
  .bm-category-grid{grid-template-columns:1fr}
  .bm-about-band{padding:30px}
  .bm-journal,.bm-pillar{padding:22px}
  body.admin-bar .bm-header{top:46px}
}


/* ===== Hero motion v1.1 ===== */
.bm-math-card{
  transform:translate3d(0,0,0);
  animation:bmHeroFloat 6s ease-in-out infinite;
  will-change:transform;
}
.bm-math-card::before{
  content:"";
  position:absolute;
  width:180px;
  height:180px;
  border-radius:50%;
  top:-70px;
  right:-55px;
  background:rgba(255,255,255,.08);
  animation:bmOrbDrift 8s ease-in-out infinite alternate;
}
.bm-formula{
  will-change:transform,opacity;
}
.bm-f1{animation:bmFormulaOne 7s ease-in-out infinite}
.bm-f2{animation:bmFormulaTwo 8.5s ease-in-out infinite}
.bm-f3{animation:bmFormulaThree 7.8s ease-in-out infinite}

@keyframes bmHeroFloat{
  0%,100%{transform:translate3d(0,0,0) rotate(0deg)}
  50%{transform:translate3d(0,-12px,0) rotate(.25deg)}
}
@keyframes bmOrbDrift{
  0%{transform:translate3d(0,0,0) scale(1)}
  100%{transform:translate3d(-28px,34px,0) scale(1.18)}
}
@keyframes bmFormulaOne{
  0%,100%{transform:translate3d(0,0,0)}
  50%{transform:translate3d(13px,-8px,0)}
}
@keyframes bmFormulaTwo{
  0%,100%{transform:translate3d(0,0,0)}
  50%{transform:translate3d(-16px,10px,0)}
}
@keyframes bmFormulaThree{
  0%,100%{transform:translate3d(0,0,0)}
  50%{transform:translate3d(12px,8px,0)}
}
@media (prefers-reduced-motion: reduce){
  .bm-math-card,.bm-math-card::before,.bm-formula{
    animation:none !important;
    transition:none !important;
    transform:none !important;
  }
}


/* ===== Full-width academic hero slider v1.2 ===== */
.bm-slider{
  position:relative;
  min-height:680px;
  overflow:hidden;
  background:#2a0e11;
}
.bm-slide{
  position:absolute;
  inset:0;
  opacity:0;
  visibility:hidden;
  transition:opacity .9s ease, visibility .9s ease;
  background-size:cover;
  background-position:center;
}
.bm-slide.is-active{
  opacity:1;
  visibility:visible;
  z-index:2;
}
.bm-slide::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(20,10,12,.78) 0%,rgba(20,10,12,.56) 40%,rgba(20,10,12,.28) 68%,rgba(20,10,12,.42) 100%),
    linear-gradient(0deg,rgba(20,10,12,.42),rgba(20,10,12,.06) 45%);
}
.bm-slide-inner{
  position:relative;
  z-index:3;
  min-height:680px;
  display:flex;
  align-items:center;
}
.bm-slide-copy{
  max-width:760px;
  color:#fff;
  padding:76px 0 88px;
}
.bm-slide-copy .bm-eyebrow{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
  color:#fff;
  backdrop-filter:blur(8px);
}
.bm-slide-copy h1{
  margin:18px 0 18px;
  font-size:clamp(48px,6.3vw,86px);
  line-height:.98;
  letter-spacing:-.055em;
  color:#fff;
  text-shadow:0 8px 30px rgba(0,0,0,.25);
}
.bm-slide-copy h1 .accent{color:#ffb6bb}
.bm-slide-copy p{
  max-width:720px;
  font-size:19px;
  color:rgba(255,255,255,.84);
}
.bm-slide .bm-btn-secondary{
  background:rgba(255,255,255,.09);
  border-color:rgba(255,255,255,.22);
  color:#fff;
  backdrop-filter:blur(8px);
}
.bm-slide .bm-btn-secondary:hover{
  background:rgba(255,255,255,.15);
}
.bm-slider-nav{
  position:absolute;
  inset:0;
  z-index:7;
  pointer-events:none;
}
.bm-slider-arrow{
  pointer-events:auto;
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  width:54px;
  height:54px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.24);
  background:rgba(20,20,20,.22);
  color:#fff;
  font-size:30px;
  line-height:1;
  display:grid;
  place-items:center;
  cursor:pointer;
  transition:.2s ease;
  backdrop-filter:blur(8px);
}
.bm-slider-arrow:hover{
  background:rgba(180,35,45,.82);
  border-color:transparent;
}
.bm-slider-prev{left:28px}
.bm-slider-next{right:28px}
.bm-slider-dots{
  position:absolute;
  left:50%;
  bottom:28px;
  z-index:8;
  transform:translateX(-50%);
  display:flex;
  gap:10px;
}
.bm-slider-dot{
  width:42px;
  height:4px;
  border:0;
  border-radius:999px;
  background:rgba(255,255,255,.4);
  padding:0;
  cursor:pointer;
  transition:.25s ease;
}
.bm-slider-dot.is-active{
  width:64px;
  background:#fff;
}
.bm-slide-fallback-1{
  background:
    radial-gradient(circle at 75% 35%,rgba(255,255,255,.08),transparent 30%),
    linear-gradient(135deg,#2a0d10 0%,#6f161d 55%,#b4232d 100%);
}
.bm-slide-fallback-2{
  background:
    radial-gradient(circle at 20% 20%,rgba(255,255,255,.08),transparent 28%),
    linear-gradient(135deg,#160d0f 0%,#4a1418 52%,#8f1f27 100%);
}
.bm-slide-fallback-3{
  background:
    linear-gradient(115deg,#210e11 0%,#6b171d 48%,#a5242c 100%);
}
@media(max-width:900px){
  .bm-slider,.bm-slide-inner{min-height:620px}
  .bm-slider-arrow{width:44px;height:44px;font-size:24px}
  .bm-slider-prev{left:12px}.bm-slider-next{right:12px}
  .bm-slide-copy{padding-left:42px;padding-right:42px}
}
@media(max-width:600px){
  .bm-slider,.bm-slide-inner{min-height:570px}
  .bm-slide-copy{padding:70px 24px 90px}
  .bm-slide-copy h1{font-size:46px}
  .bm-slide-copy p{font-size:16px}
  .bm-slider-arrow{display:none}
}
@media(prefers-reduced-motion:reduce){
  .bm-slide{transition:none!important}
}


/* ===== News system v1.3 ===== */
.bm-news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
  margin-top:34px;
}
.bm-news-card{
  background:#fff;
  border:1px solid var(--bm-line);
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--bm-shadow);
  transition:.22s ease;
}
.bm-news-card:hover{
  transform:translateY(-4px);
  border-color:#efc4c7;
}
.bm-news-thumb{
  display:block;
  aspect-ratio:16/10;
  background:linear-gradient(135deg,#f7d9dc,#b4232d);
  overflow:hidden;
}
.bm-news-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  transition:transform .35s ease;
}
.bm-news-card:hover .bm-news-thumb img{transform:scale(1.035)}
.bm-news-body{padding:22px}
.bm-news-meta{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  align-items:center;
  margin-bottom:10px;
  font-size:12px;
  font-weight:800;
  color:var(--bm-muted);
  text-transform:uppercase;
  letter-spacing:.04em;
}
.bm-news-category{color:var(--bm-red)}
.bm-news-card h3{
  margin:0 0 10px;
  font-size:22px;
  line-height:1.28;
  letter-spacing:-.025em;
}
.bm-news-card p{
  color:var(--bm-muted);
  margin:0 0 16px;
  font-size:14px;
}
.bm-news-header{
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:24px;
}
.bm-news-header .bm-section-title{margin-bottom:0}
.bm-pagination{
  margin-top:36px;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.bm-pagination .page-numbers{
  display:inline-flex;
  min-width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  background:#fff;
  border:1px solid var(--bm-line);
  font-weight:800;
  padding:0 12px;
}
.bm-pagination .page-numbers.current{
  background:var(--bm-red);
  color:#fff;
  border-color:var(--bm-red);
}
.bm-article-hero{
  padding:62px 0 28px;
}
.bm-article-meta{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  color:var(--bm-muted);
  font-size:13px;
  font-weight:700;
  margin-top:14px;
}
.bm-article-title{
  max-width:950px;
  font-size:clamp(38px,5vw,64px);
  line-height:1.05;
  letter-spacing:-.045em;
  margin:16px 0 0;
}
.bm-featured-large{
  margin-top:26px;
  border-radius:26px;
  overflow:hidden;
  border:1px solid var(--bm-line);
  background:#fff;
}
.bm-featured-large img{
  width:100%;
  display:block;
  max-height:650px;
  object-fit:cover;
}
.bm-article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:34px;
  align-items:start;
}
.bm-article-main,
.bm-article-side{
  background:#fff;
  border:1px solid var(--bm-line);
  border-radius:22px;
  padding:30px;
  box-shadow:var(--bm-shadow);
}
.bm-article-side h3{margin-top:0}
.bm-related-item{
  padding:14px 0;
  border-bottom:1px solid var(--bm-line);
}
.bm-related-item:last-child{border-bottom:0}
.bm-related-item a{font-weight:800}
@media(max-width:900px){
  .bm-news-grid{grid-template-columns:1fr 1fr}
  .bm-article-layout{grid-template-columns:1fr}
}
@media(max-width:640px){
  .bm-news-grid{grid-template-columns:1fr}
  .bm-news-header{align-items:flex-start;flex-direction:column}
}