/* =========================================================
   Program Studi Teknik Mesin UBB — Design System
   Concept: technical drawing / blueprint drafting room.
   Paper vellum background, blueprint-navy header, safety-
   orange working accent, brass secondary. Dimension-line
   dividers and a drafting title-block footer are the
   signature devices — both real artifacts of engineering
   drawing practice, not decoration.
   ========================================================= */

:root{
  --paper:      #F5F2EA;   /* vellum / drafting paper */
  --paper-dim:  #ECE7DA;
  --ink:        #1B2430;   /* graphite */
  --ink-soft:   #4B5563;
  --navy:       #10233A;   /* blueprint navy */
  --navy-2:     #16324F;
  --blueline:   #4E86A8;   /* blueprint cyan-line */
  --blueline-soft: rgba(78,134,168,0.35);
  --orange:     #D9591F;   /* safety orange — working accent */
  --orange-dark:#B84717;
  --brass:      #A87C4F;   /* hardware / secondary accent */
  --line:       #D8D2C2;   /* hairline on paper */
  --radius:     2px;
  --maxw:       1180px;
  --font-display: 'Space Grotesk', 'IBM Plex Sans', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.15;
  margin:0 0 .5em;
  color:var(--navy);
  letter-spacing:-0.01em;
}
p{ margin:0 0 1em; }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }

:focus-visible{ outline:2px solid var(--orange); outline-offset:2px; }

/* ---------- graph-paper texture (used behind hero) ---------- */
.grid-tex{
  background-image:
    linear-gradient(var(--blueline-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueline-soft) 1px, transparent 1px);
  background-size:28px 28px;
}

/* ---------- eyebrow / label chips ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:.9em;
}
.eyebrow::before{
  content:"";
  width:18px; height:2px;
  background:var(--orange);
  display:inline-block;
}

/* =========================================================
   TOP UTILITY BAR
   ========================================================= */
.utility-bar{
  background:var(--navy);
  color:#B9C6D4;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.03em;
}
.utility-bar .wrap{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:6px 24px;
  gap:16px;
  flex-wrap:wrap;
}
.utility-bar a{ color:#B9C6D4; }
.utility-bar a:hover{ color:#fff; }
.utility-bar .sep{ opacity:.4; margin:0 8px; }

/* =========================================================
   HEADER / NAV — styled like a spec-plate strip
   ========================================================= */
header.site-header{
  background:var(--navy);
  border-bottom:3px solid var(--orange);
  position:sticky; top:0; z-index:100;
}
.nav-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 24px;
  gap:24px;
}
.brand{
  display:flex; align-items:center; gap:12px;
  color:#fff;
}
.brand svg{ width:38px; height:38px; flex-shrink:0; }
.brand-text{ line-height:1.2; }
.brand-text .prog{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.05rem;
  color:#fff;
}
.brand-text .inst{
  font-family:var(--font-mono);
  font-size:.7rem;
  color:var(--blueline);
  letter-spacing:.06em;
}

nav.main-nav{ display:flex; }
nav.main-nav > ul{ display:flex; align-items:center; gap:2px; }
nav.main-nav > ul > li{ position:relative; }
nav.main-nav > ul > li > a, nav.main-nav > ul > li > button{
  display:flex; align-items:center; gap:6px;
  padding:10px 14px;
  color:#DCE4EB;
  font-size:.88rem;
  font-weight:500;
  background:none; border:none; cursor:pointer;
  font-family:var(--font-body);
}
nav.main-nav > ul > li > a:hover,
nav.main-nav > ul > li > button:hover,
nav.main-nav > ul > li.active > a{
  color:#fff;
  background:rgba(255,255,255,0.06);
}
nav.main-nav > ul > li.active > a{ color:var(--orange); }
.caret{ font-size:.6rem; opacity:.7; }

.dropdown{
  position:absolute; top:100%; left:0;
  min-width:240px;
  background:#fff;
  border-top:2px solid var(--orange);
  box-shadow:0 12px 28px rgba(16,35,58,.22);
  padding:6px 0;
  opacity:0; visibility:hidden;
  transform:translateY(4px);
  transition:opacity .15s ease, transform .15s ease, visibility .15s;
}
nav.main-nav > ul > li:hover .dropdown,
nav.main-nav > ul > li:focus-within .dropdown{
  opacity:1; visibility:visible; transform:translateY(0);
}
.dropdown a{
  display:block;
  padding:10px 18px;
  font-size:.86rem;
  color:var(--ink);
  border-left:3px solid transparent;
}
.dropdown a:hover{
  background:var(--paper-dim);
  border-left-color:var(--orange);
  color:var(--navy);
}

.menu-toggle{
  display:none;
  background:none; border:1px solid rgba(255,255,255,.3);
  color:#fff; padding:8px 10px; font-size:1.1rem; cursor:pointer;
}

@media (max-width: 980px){
  .menu-toggle{ display:block; }
  nav.main-nav{
    position:absolute; top:100%; left:0; right:0;
    background:var(--navy-2);
    display:none;
    border-bottom:3px solid var(--orange);
  }
  nav.main-nav.open{ display:block; }
  nav.main-nav > ul{ flex-direction:column; align-items:stretch; padding:8px 0; }
  nav.main-nav > ul > li > a, nav.main-nav > ul > li > button{
    width:100%; padding:12px 24px; justify-content:space-between;
  }
  .dropdown{
    position:static; box-shadow:none; border-top:none;
    background:rgba(0,0,0,.15);
    display:none;
    min-width:0;
    opacity:1; visibility:visible; transform:none;
  }
  li.dd-open .dropdown{ display:block; }
  .dropdown a{ color:#DCE4EB; padding-left:36px; }
  .dropdown a:hover{ background:rgba(255,255,255,.06); color:#fff; }
}

/* =========================================================
   DIMENSION-LINE DIVIDER — signature element.
   Mirrors a dimension callout in a technical drawing:
   tick — line — label — line — tick.
   ========================================================= */
.dim-divider{
  display:flex; align-items:center; gap:14px;
  margin:0 0 40px;
  color:var(--blueline);
}
.dim-divider::before, .dim-divider::after{
  content:""; flex:1; height:1px;
  background:var(--blueline);
  position:relative;
}
.dim-divider::before{ margin-left:0; }
.dim-divider .dim-label{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--blueline);
  white-space:nowrap;
}
/* tick marks via extra pseudo on wrapping span using border */
.dim-divider .tick{
  width:1px; height:12px; background:var(--blueline);
}

/* =========================================================
   HERO (home)
   ========================================================= */
.hero{
  background:var(--navy);
  color:#fff;
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--blueline-soft);
}
.hero .grid-tex{
  position:absolute; inset:0;
  opacity:.5;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:40px;
  align-items:center;
  padding:76px 24px 64px;
}
@media (max-width: 900px){ .hero-inner{ grid-template-columns:1fr; padding-top:48px; } }

.hero h1{
  color:#fff;
  font-size:clamp(2rem, 4vw, 3.1rem);
  margin-bottom:.4em;
}
.hero p.lede{
  color:#C9D4DE;
  font-size:1.05rem;
  max-width:52ch;
}
.hero-stats{
  display:flex; gap:28px; margin-top:28px; flex-wrap:wrap;
}
.hero-stats div{ border-left:2px solid var(--orange); padding-left:12px; }
.hero-stats .n{ font-family:var(--font-mono); font-size:1.5rem; color:#fff; display:block; }
.hero-stats .l{ font-size:.75rem; color:#9FB0BF; text-transform:uppercase; letter-spacing:.06em; }

.hero-diagram{ position:relative; }
.hero-diagram svg{ width:100%; height:auto; }

.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 22px;
  font-family:var(--font-body); font-weight:600; font-size:.92rem;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
}
.btn-primary{ background:var(--orange); color:#fff; }
.btn-primary:hover{ background:var(--orange-dark); }
.btn-outline{ border-color:rgba(255,255,255,.4); color:#fff; }
.btn-outline:hover{ background:rgba(255,255,255,.1); }
.btn-row{ display:flex; gap:12px; margin-top:32px; flex-wrap:wrap; }

/* quick-link strip under hero */
.quicklinks{ background:var(--navy-2); }
.quicklinks .wrap{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(180px, 1fr));
  gap:1px; background:rgba(255,255,255,.08);
}
.quicklinks a{
  background:var(--navy-2);
  padding:18px 20px;
  color:#fff;
  display:flex; flex-direction:column; gap:4px;
}
.quicklinks a:hover{ background:#1c3c5c; }
.quicklinks .qtitle{ font-weight:600; font-size:.92rem; }
.quicklinks .qsub{ font-size:.76rem; color:#9FB0BF; }
@media (max-width: 500px){ .quicklinks .wrap{ grid-template-columns:1fr; } }

/* =========================================================
   PAGE HEADER (interior pages)
   ========================================================= */
.page-header{
  background:var(--navy);
  color:#fff;
  padding:52px 24px 40px;
  border-bottom:3px solid var(--orange);
  position:relative;
}
.page-header h1{ color:#fff; margin-bottom:.3em; }
.breadcrumb{
  font-family:var(--font-mono); font-size:.75rem;
  color:var(--blueline); letter-spacing:.04em;
  margin-bottom:14px;
}
.breadcrumb a{ color:#9FB0BF; }
.breadcrumb a:hover{ color:#fff; }
.page-header p{ color:#C9D4DE; max-width:60ch; margin-bottom:0; }

/* =========================================================
   SECTIONS / GENERIC LAYOUT
   ========================================================= */
section{ padding:60px 0; }
section.tight{ padding:40px 0; }
section.alt{ background:var(--paper-dim); }
.section-head{ margin-bottom:36px; max-width:70ch; }
.section-head h2{ font-size:1.8rem; }
.section-head .sub{ color:var(--ink-soft); font-size:.98rem; }

.two-col{ display:grid; grid-template-columns:1.1fr .9fr; gap:48px; align-items:start; }
@media (max-width: 860px){ .two-col{ grid-template-columns:1fr; } }

.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.card:hover{ border-color:var(--blueline); }

/* news / announcement cards */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
@media (max-width:900px){ .grid-3{ grid-template-columns:1fr 1fr; } .grid-4{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .grid-3{ grid-template-columns:1fr; } .grid-4{ grid-template-columns:1fr; } }

.news-card{ overflow:hidden; display:flex; flex-direction:column; }
.news-card .thumb{
  aspect-ratio:16/10; background:var(--paper-dim);
  display:flex; align-items:center; justify-content:center;
  color:var(--blueline); font-family:var(--font-mono); font-size:.72rem;
  border-bottom:1px solid var(--line);
}
.news-card .body{ padding:18px 20px 22px; flex:1; display:flex; flex-direction:column; }
.news-card .date{
  font-family:var(--font-mono); font-size:.72rem; color:var(--orange);
  letter-spacing:.05em; margin-bottom:8px;
}
.news-card h3{ font-size:1.05rem; margin-bottom:.5em; }
.news-card p{ color:var(--ink-soft); font-size:.9rem; margin-bottom:0; }
.news-card .more{ margin-top:auto; padding-top:14px; font-size:.82rem; font-weight:600; color:var(--navy); }
.news-card:hover .more{ color:var(--orange); }

.announce-list{ display:flex; flex-direction:column; }
.announce-item{
  display:flex; justify-content:space-between; gap:16px;
  padding:18px 0; border-bottom:1px solid var(--line);
}
.announce-item:hover h3{ color:var(--orange); }
.announce-item .date{
  font-family:var(--font-mono); font-size:.78rem; color:var(--ink-soft); white-space:nowrap;
}
.announce-item h3{ font-size:1rem; margin-bottom:.3em; }
.announce-item p{ font-size:.88rem; color:var(--ink-soft); margin-bottom:0; }

/* staff / dosen cards */
.staff-card{ padding:20px; text-align:left; }
.staff-card .photo{
  aspect-ratio:1/1; background:var(--paper-dim);
  border:1px solid var(--line); margin-bottom:14px;
  display:flex; align-items:center; justify-content:center;
  color:var(--blueline); font-family:var(--font-mono); font-size:.7rem;
}
.staff-card h3{ font-size:1rem; margin-bottom:.15em; }
.staff-card .role{ font-size:.82rem; color:var(--orange); font-weight:600; margin-bottom:.5em; }
.staff-card .meta{ font-family:var(--font-mono); font-size:.74rem; color:var(--ink-soft); }

/* stat / spec strip */
.spec-strip{
  display:grid; grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line); background:#fff;
}
.spec-strip > div{ padding:22px; border-left:1px solid var(--line); }
.spec-strip > div:first-child{ border-left:none; }
.spec-strip .n{ font-family:var(--font-mono); font-size:1.6rem; color:var(--navy); display:block; }
.spec-strip .l{ font-size:.78rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.04em; }
@media (max-width:800px){ .spec-strip{ grid-template-columns:1fr 1fr; } .spec-strip>div{ border-top:1px solid var(--line); } .spec-strip>div:nth-child(1),.spec-strip>div:nth-child(2){border-top:none;} }

/* timeline (sejarah) */
.timeline{ position:relative; padding-left:28px; border-left:2px solid var(--blueline); }
.tl-item{ position:relative; padding-bottom:34px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:""; position:absolute; left:-34px; top:2px;
  width:10px; height:10px; background:var(--orange); border-radius:50%;
  border:2px solid var(--paper);
  box-shadow:0 0 0 2px var(--blueline);
}
.tl-item .yr{ font-family:var(--font-mono); color:var(--orange); font-size:.85rem; font-weight:600; }
.tl-item h3{ font-size:1.05rem; margin:.2em 0 .3em; }
.tl-item p{ color:var(--ink-soft); font-size:.92rem; margin-bottom:0; }

/* accordion (visi misi / kurikulum) */
.acc-item{ border:1px solid var(--line); background:#fff; margin-bottom:10px; }
.acc-item summary{
  cursor:pointer; list-style:none; padding:16px 20px;
  display:flex; justify-content:space-between; align-items:center;
  font-weight:600; color:var(--navy);
  font-family:var(--font-display);
}
.acc-item summary::-webkit-details-marker{ display:none; }
.acc-item summary::after{ content:"+"; color:var(--orange); font-size:1.3rem; }
.acc-item[open] summary::after{ content:"–"; }
.acc-item .acc-body{ padding:0 20px 18px; color:var(--ink-soft); }

/* table */
table.spec-table{ width:100%; border-collapse:collapse; background:#fff; }
table.spec-table th, table.spec-table td{
  border:1px solid var(--line); padding:12px 14px; text-align:left; font-size:.9rem;
}
table.spec-table th{
  background:var(--navy); color:#fff; font-family:var(--font-mono);
  font-size:.74rem; text-transform:uppercase; letter-spacing:.04em;
}
table.spec-table tr:nth-child(even) td{ background:var(--paper-dim); }

/* gallery */
.gal-item{ aspect-ratio:4/3; background:var(--paper-dim); border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; color:var(--blueline);
  font-family:var(--font-mono); font-size:.72rem; text-align:center; padding:10px; }

/* form (kontak) */
.form-grid{ display:grid; gap:16px; }
.form-grid label{ font-size:.82rem; font-weight:600; color:var(--navy); display:block; margin-bottom:6px; }
.form-grid input, .form-grid textarea, .form-grid select{
  width:100%; padding:11px 13px; border:1px solid var(--line); background:#fff;
  font-family:var(--font-body); font-size:.92rem; color:var(--ink); border-radius:var(--radius);
}
.form-grid input:focus, .form-grid textarea:focus{ border-color:var(--blueline); outline:none; }

/* callout box */
.callout{
  border-left:3px solid var(--orange);
  background:#fff; padding:18px 22px; font-size:.92rem; color:var(--ink-soft);
}

/* placeholder ribbon (dev note visible in edit mode) */
.ph{ color:var(--brass); }

/* =========================================================
   FOOTER — drafting title block
   ========================================================= */
footer.site-footer{ background:var(--navy); color:#B9C6D4; margin-top:0; }
.footer-top{ padding:56px 0 32px; border-bottom:1px solid rgba(255,255,255,.1); }
.footer-grid{ display:grid; grid-template-columns:1.3fr 1fr 1fr 1fr; gap:36px; }
@media (max-width:900px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-grid h4{
  color:#fff; font-family:var(--font-mono); font-size:.74rem;
  letter-spacing:.1em; text-transform:uppercase; margin-bottom:16px;
}
.footer-grid a{ color:#B9C6D4; display:block; padding:5px 0; font-size:.9rem; }
.footer-grid a:hover{ color:#fff; }
.footer-brand p{ color:#8CA0B3; font-size:.88rem; max-width:34ch; }

/* the title-block strip itself, styled like the corner
   stamp on an engineering drawing sheet */
.titleblock{ background:var(--navy-2); border-top:1px solid rgba(255,255,255,.1); }
.tb-grid{
  display:grid; grid-template-columns:repeat(6,1fr);
  border:1px solid rgba(255,255,255,.18);
  margin:22px 0;
}
.tb-cell{
  border-left:1px solid rgba(255,255,255,.18);
  padding:10px 14px;
}
.tb-cell:first-child{ border-left:none; }
.tb-cell .k{ font-family:var(--font-mono); font-size:.62rem; color:var(--blueline); letter-spacing:.08em; text-transform:uppercase; display:block; }
.tb-cell .v{ font-family:var(--font-mono); font-size:.8rem; color:#fff; margin-top:2px; }
@media (max-width:900px){ .tb-grid{ grid-template-columns:repeat(3,1fr); } .tb-cell:nth-child(4){ border-left:none; } }
@media (max-width:560px){ .tb-grid{ grid-template-columns:repeat(2,1fr); } .tb-cell:nth-child(3),.tb-cell:nth-child(5){ border-left:none; } }

.copyline{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px;
  padding:16px 0 26px; font-size:.78rem; color:#7C90A3;
}

/* skip link */
.skip-link{
  position:absolute; left:-999px; top:0; background:var(--orange); color:#fff;
  padding:10px 16px; z-index:1000;
}
.skip-link:focus{ left:8px; top:8px; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; animation:none !important; }
}