/* =========================================================
   Gayatri Education — Design System
   Ink navy + deep saffron + steel sky, on warm grained paper.
   Signature element: the stamped "Training Passport" timeline
   used across internship + course detail pages.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --ink:        #14241E;
  --ink-70:     rgba(20, 36, 30, 0.75);
  --ink-45:     rgba(20, 36, 30, 0.48);
  --saffron:    #9C4221;
  --saffron-dk: #7A3217;
  --sky:        #1E3A5F;
  --sky-dk:     #142740;
  --paper:      #FAF7EF;
  --paper-2:    #EFE8D8;
  --card:       #FFFFFF;
  --line:       rgba(20, 36, 30, 0.16);
  --terracotta: #9C4221;
  --forest:     #2D5A43;
  --gold:       #B8860B;
  --radius:     2px;
  --shadow:     0 1px 2px rgba(20, 36, 30, 0.05), 0 8px 24px -12px rgba(20, 36, 30, 0.18);
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:
    radial-gradient(rgba(20, 36, 30, 0.045) 1px, transparent 1px) 0 0/20px 20px,
    var(--paper);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:600; line-height:1.12; margin:0 0 .5em; letter-spacing:-.01em; }
h1{ font-size:clamp(2.2rem,4.6vw,3.6rem); font-weight:600; }
h2{ font-size:clamp(1.6rem,3vw,2.3rem); }
h3{ font-size:1.25rem; }
p{ margin:0 0 1em; }
.eyebrow{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase;
  color:var(--saffron-dk); display:inline-flex; align-items:center; gap:.5em; margin-bottom:.9em;
}
.eyebrow::before{ content:''; width:18px; height:1px; background:var(--saffron-dk); display:inline-block; }
.muted{ color:var(--ink-70); }
.container{ max-width:1120px; margin:0 auto; padding:0 24px; }
.container-narrow{ max-width:760px; margin:0 auto; padding:0 24px; }
section{ padding:72px 0; }
.section-tight{ padding:40px 0; }
hr.rule{ border:none; border-top:1px solid var(--line); margin:0; }

/* Buttons */
.btn{
  display:inline-flex; align-items:center; gap:.5em; font-family:var(--font-body); font-weight:600;
  font-size:.94rem; padding:.78em 1.4em; border-radius:var(--radius); border:1px solid transparent;
  cursor:pointer; text-decoration:none; transition:transform .12s ease, box-shadow .12s ease;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--ink); color:var(--paper); box-shadow:var(--shadow); }
.btn-primary:hover{ background:#0F2038; }
.btn-saffron{ background:var(--saffron); color:#fff; }
.btn-saffron:hover{ background:var(--saffron-dk); }
.btn-outline{ background:transparent; border-color:var(--ink); color:var(--ink); }
.btn-outline:hover{ background:var(--ink); color:var(--paper); }
.btn-ghost{ background:transparent; color:var(--ink); border-color:var(--line); }
.btn-block{ width:100%; justify-content:center; }
.btn-sm{ padding:.5em 1em; font-size:.82rem; }
.btn[disabled], .btn.is-locked{ opacity:.5; cursor:not-allowed; }

/* Top nav */
.site-header{
  position:sticky; top:0; z-index:40; background:rgba(250,244,231,.92); backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.nav{ display:flex; align-items:center; justify-content:space-between; padding:16px 24px; max-width:1120px; margin:0 auto; }
.brand{ display:flex; align-items:center; gap:.6em; text-decoration:none; }
.brand-mark{
  width:34px; height:34px; border-radius:50%; background:var(--ink); color:var(--paper);
  display:flex; align-items:center; justify-content:center; font-family:var(--font-display); font-weight:700;
  transform:rotate(-4deg);
}
.brand-name{ font-family:var(--font-display); font-weight:600; font-size:1.08rem; color:var(--ink); }
.brand-name span{ color:var(--saffron-dk); }
.nav-links{ display:flex; gap:28px; list-style:none; margin:0; padding:0; font-size:.92rem; font-weight:500; }
.nav-links a{ text-decoration:none; position:relative; padding-bottom:4px; }
.nav-links a::after{ content:''; position:absolute; left:0; right:0; bottom:0; height:2px; background:var(--saffron); transform:scaleX(0); transition:transform .15s ease; }
.nav-links a:hover::after, .nav-links a.active::after{ transform:scaleX(1); }
.nav-cta{ display:flex; align-items:center; gap:12px; }
.nav-toggle{ display:none; background:none; border:none; font-size:1.4rem; cursor:pointer; }
@media (max-width:860px){
  .nav-links{ display:none; }
  .nav-toggle{ display:block; }
  .nav.is-open .nav-links{
    display:flex; flex-direction:column; position:absolute; top:66px; left:0; right:0; background:var(--paper);
    padding:20px 24px; border-bottom:1px solid var(--line); gap:16px;
  }
}

/* Footer */
.site-footer{ border-top:1px solid var(--line); margin-top:80px; padding:48px 0 28px; font-size:.88rem; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; }
.footer-grid h4{ font-family:var(--font-mono); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-70); margin-bottom:.9em; }
.footer-grid ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:.6em; }
.footer-grid a{ text-decoration:none; color:var(--ink-70); }
.footer-grid a:hover{ color:var(--ink); }
.footer-bottom{ display:flex; justify-content:space-between; margin-top:40px; padding-top:20px; border-top:1px solid var(--line); color:var(--ink-45); font-family:var(--font-mono); font-size:.72rem; }
@media (max-width:760px){ .footer-grid{ grid-template-columns:1fr 1fr; } }

/* Hero stamp */
.stamp{
  display:inline-flex; align-items:center; gap:.5em; font-family:var(--font-mono); font-size:.7rem;
  letter-spacing:.08em; text-transform:uppercase; border:1.5px dashed var(--ink-45); color:var(--ink-70);
  padding:.5em .9em; border-radius:40px; transform:rotate(-2deg);
}

/* Cards */
.card{ background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow); padding:28px; }
.grid{ display:grid; gap:24px; }
.grid-2{ grid-template-columns:repeat(2,1fr); }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }
@media (max-width:900px){ .grid-3, .grid-4{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:600px){ .grid-2, .grid-3, .grid-4{ grid-template-columns:1fr; } }

/* Domain / course cards */
.domain-card, .course-card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:26px;
  display:flex; flex-direction:column; gap:10px; text-decoration:none; color:var(--ink); position:relative;
  transition:box-shadow .15s ease, transform .15s ease;
}
.domain-card:hover, .course-card:hover{ box-shadow:var(--shadow); transform:translateY(-2px); }
.domain-card .code, .course-card .code{ font-family:var(--font-mono); font-size:.7rem; color:var(--saffron-dk); letter-spacing:.08em; }
.pill{ display:inline-flex; align-items:center; font-family:var(--font-mono); font-size:.68rem; letter-spacing:.06em; text-transform:uppercase; padding:.3em .7em; border-radius:20px; background:var(--paper-2); color:var(--ink-70); width:fit-content; }
.pill-free{ background:rgba(47,107,79,.12); color:var(--forest); }
.pill-locked{ background:rgba(181,72,46,.1); color:var(--terracotta); }

/* Training Passport — signature timeline element */
.passport{
  display:flex; align-items:stretch; gap:0; margin:36px 0; position:relative;
  border:1px solid var(--line); border-radius:var(--radius); background:var(--card); overflow:hidden;
}
.passport::before{
  content:''; position:absolute; inset:8px; border:1px dashed var(--ink-45); pointer-events:none; border-radius:2px;
}
.passport-stage{ flex:1; padding:26px 22px; position:relative; }
.passport-stage + .passport-stage{ border-left:1px dashed var(--line); }
.passport-stage .stage-num{
  font-family:var(--font-mono); font-size:.7rem; color:var(--ink-45); letter-spacing:.08em;
}
.passport-stage h4{ font-family:var(--font-display); font-size:1.05rem; margin:.3em 0 .35em; }
.passport-stage .stage-dur{ font-family:var(--font-mono); font-size:.72rem; color:var(--saffron-dk); text-transform:uppercase; letter-spacing:.06em; margin-bottom:.5em; display:block; }
.passport-stamp{
  position:absolute; top:14px; right:14px; width:44px; height:44px; border:2px solid var(--sky); border-radius:50%;
  display:flex; align-items:center; justify-content:center; transform:rotate(-8deg); opacity:.85;
}
.passport-stamp span{ font-family:var(--font-mono); font-size:.55rem; color:var(--sky-dk); text-align:center; line-height:1.1; }
@media (max-width:760px){
  .passport{ flex-direction:column; }
  .passport-stage + .passport-stage{ border-left:none; border-top:1px dashed var(--line); }
}

/* Forms */
label{ display:block; font-size:.86rem; font-weight:600; margin-bottom:.4em; }
.field{ margin-bottom:20px; }
.field small.hint{ display:block; margin-top:.35em; color:var(--ink-45); font-size:.78rem; }
input[type=text], input[type=email], input[type=password], input[type=tel], input[type=file], select, textarea{
  width:100%; padding:.75em .9em; border:1px solid var(--line); border-radius:var(--radius);
  background:var(--card); font-family:var(--font-body); font-size:.94rem; color:var(--ink);
}
textarea{ resize:vertical; min-height:110px; }
input:focus, select:focus, textarea:focus, a:focus-visible, button:focus-visible{
  outline:2px solid var(--sky); outline-offset:2px;
}
.form-card{ max-width:560px; margin:0 auto; }
.form-row-2{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
@media (max-width:560px){ .form-row-2{ grid-template-columns:1fr; } }
.form-error{ color:var(--terracotta); font-size:.85rem; margin-top:.4em; }
.form-note{ font-size:.82rem; color:var(--ink-45); }

/* Status badges */
.status{ font-family:var(--font-mono); font-size:.72rem; letter-spacing:.06em; text-transform:uppercase; padding:.35em .8em; border-radius:20px; display:inline-block; }
.status-review{ background:rgba(62,124,177,.14); color:var(--sky-dk); }
.status-approved{ background:rgba(47,107,79,.14); color:var(--forest); }
.status-rejected{ background:rgba(181,72,46,.12); color:var(--terracotta); }
.status-waitlisted{ background:rgba(217,129,44,.15); color:var(--saffron-dk); }

/* App shell (intern / admin dashboards) */
.app-shell{ display:flex; min-height:calc(100vh - 66px); }
.app-sidebar{ width:230px; flex:none; border-right:1px solid var(--line); padding:28px 18px; background:var(--paper-2); }
.app-sidebar nav ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:4px; }
.app-sidebar a{ display:block; text-decoration:none; padding:.65em .8em; border-radius:var(--radius); font-size:.92rem; font-weight:500; color:var(--ink-70); }
.app-sidebar a:hover, .app-sidebar a.active{ background:var(--card); color:var(--ink); }
.app-main{ flex:1; padding:36px; }
@media (max-width:760px){ .app-shell{ flex-direction:column; } .app-sidebar{ width:100%; display:flex; overflow-x:auto; } .app-sidebar nav ul{ flex-direction:row; } }

/* Tables (admin) */
table{ width:100%; border-collapse:collapse; font-size:.9rem; background:var(--card); }
th, td{ text-align:left; padding:12px 14px; border-bottom:1px solid var(--line); }
th{ font-family:var(--font-mono); font-size:.7rem; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-70); }
.table-wrap{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }

/* Misc */
.divider-torn{ height:14px; background:repeating-linear-gradient(115deg, var(--paper) 0 10px, transparent 10px 20px), var(--line); margin:0; }
.center{ text-align:center; }
.flex-between{ display:flex; align-items:center; justify-content:space-between; gap:16px; }
.stack-16{ display:flex; flex-direction:column; gap:16px; }
.stack-8{ display:flex; flex-direction:column; gap:8px; }
.badge-social{ display:inline-flex; align-items:center; gap:.6em; padding:.9em 1.3em; border-radius:var(--radius); text-decoration:none; font-weight:600; color:#fff; }
.badge-whatsapp{ background:#2F6B4F; }
.badge-discord{ background:#3E4CB1; }
.alert{ padding:14px 16px; border-radius:var(--radius); border:1px solid var(--line); font-size:.88rem; }
.alert-info{ background:rgba(62,124,177,.08); border-color:rgba(62,124,177,.3); }
.alert-success{ background:rgba(47,107,79,.08); border-color:rgba(47,107,79,.3); }
.alert-error{ background:rgba(181,72,46,.08); border-color:rgba(181,72,46,.3); }

/* =========================================================
   Product Showcase & Interactive Architecture Extensions
   ========================================================= */

/* Nav Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-menu {
  display: none; position: absolute; top: 100%; left: -16px; min-width: 300px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 10px 0; z-index: 50; margin-top: 6px;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: flex; align-items: center; gap: 12px; padding: 10px 18px; text-decoration: none;
  font-size: .88rem; color: var(--ink); transition: background .12s ease;
}
.nav-dropdown-menu a:hover { background: var(--paper-2); }
.nav-dropdown-menu a::after { display: none !important; }
.nav-dropdown-menu .dd-icon {
  width: 30px; height: 30px; border-radius: 4px; display: flex; align-items: center;
  justify-content: center; font-family: var(--font-mono); font-size: .72rem; font-weight: 700; flex-shrink: 0;
}
.nav-dropdown-menu .dd-footer {
  border-top: 1px solid var(--line); margin-top: 6px; padding-top: 8px; font-weight: 600; color: var(--saffron-dk);
}

/* Category Filter Tabs */
.filter-tabs { display: flex; gap: 8px; margin-bottom: 28px; flex-wrap: wrap; }
.filter-tab {
  padding: .52em 1.15em; border-radius: var(--radius); font-size: .86rem; font-weight: 500;
  cursor: pointer; transition: all .14s ease; border: 1px solid transparent; background: transparent; color: var(--ink);
  font-family: var(--font-body);
}
.filter-tab:hover { background: var(--paper-2); }
.filter-tab.active { background: var(--ink); color: var(--paper); box-shadow: 0 1px 2px rgba(20,42,69,.12); }

/* Metrics Telemetry Strip */
.metrics-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow);
}
.metric-card { text-align: center; padding: 26px 18px; border-right: 1px solid var(--line); }
.metric-card:last-child { border-right: none; }
.metric-num { font-family: var(--font-display); font-size: 2.3rem; font-weight: 700; color: var(--ink); line-height: 1.05; }
.metric-label {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-70); margin-top: 6px;
}
@media (max-width: 800px) {
  .metrics-strip { grid-template-columns: repeat(2, 1fr); }
  .metric-card:nth-child(2) { border-right: none; }
  .metric-card:nth-child(1), .metric-card:nth-child(2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 480px) {
  .metrics-strip { grid-template-columns: 1fr; }
  .metric-card { border-right: none !important; border-bottom: 1px solid var(--line); }
  .metric-card:last-child { border-bottom: none; }
}

/* Product Cards */
.product-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; display: flex; flex-direction: column; gap: 12px; position: relative;
  transition: box-shadow .15s ease, transform .15s ease;
}
.product-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.product-card h3 { font-size: 1.22rem; margin: 2px 0; }
.product-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.product-icon {
  width: 32px; height: 32px; border-radius: 4px; display: inline-flex; align-items: center;
  justify-content: center; font-family: var(--font-mono); font-size: .75rem; font-weight: 700;
}
.product-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tech-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }
.tech-chip {
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .04em;
  padding: .28em .6em; border-radius: 2px; background: var(--paper-2); color: var(--ink-70);
  border: 1px solid rgba(20,42,69,.06);
}

/* Badges & Pills */
.pill-live { background: rgba(47,107,79,.12); color: var(--forest); }
.pill-enterprise { background: rgba(62,124,177,.14); color: var(--sky-dk); }
.pill-dev { background: rgba(217,129,44,.15); color: var(--saffron-dk); }
.pill-ops { background: rgba(181,72,46,.12); color: var(--terracotta); }

/* Architecture Diagram Stack */
.arch-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 26px;
}
.arch-layer {
  display: flex; align-items: center; gap: 14px; padding: 12px 16px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper);
  transition: border-color .15s ease, background .15s ease;
}
.arch-layer:hover { background: var(--paper-2); border-color: var(--sky); }
.arch-layer-label {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-70); min-width: 78px; font-weight: 600;
}
.arch-layer-spec { font-size: .88rem; color: var(--ink); line-height: 1.35; }
.arch-connector {
  width: 2px; height: 14px; background: repeating-linear-gradient(to bottom, var(--line) 0, var(--line) 3px, transparent 3px, transparent 6px);
  margin: 0 auto;
}

/* Interactive Tabs (Portals / Showcase) */
.tab-nav {
  display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 20px;
  overflow-x: auto;
}
.tab-btn {
  padding: 10px 18px; border: none; background: transparent; font-family: var(--font-body);
  font-size: .9rem; font-weight: 600; color: var(--ink-70); cursor: pointer; border-bottom: 2px solid transparent;
  transition: all .12s ease; white-space: nowrap;
}
.tab-btn:hover { color: var(--ink); }
.tab-btn.active { color: var(--ink); border-bottom-color: var(--saffron); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Socratic Pedagogy Graph Steps */
.step-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 24px 0;
}
@media (max-width: 800px) { .step-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .step-grid { grid-template-columns: 1fr; } }
.step-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; position: relative;
}
.step-num {
  font-family: var(--font-mono); font-size: .72rem; color: var(--saffron-dk);
  letter-spacing: .08em; font-weight: 600; margin-bottom: 4px;
}
.step-card h4 { font-size: .98rem; margin: 0 0 4px; font-family: var(--font-display); }
.step-card p { font-size: .82rem; color: var(--ink-70); margin: 0; }

/* Product Detail Views */
.detail-header {
  padding: 48px 0 32px; border-bottom: 1px solid var(--line); margin-bottom: 40px;
}
.detail-meta-bar {
  display: flex; align-items: center; gap: 14px; margin-top: 14px; flex-wrap: wrap;
}
.feature-list {
  list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px;
}
.feature-item {
  display: flex; gap: 12px; align-items: flex-start; font-size: .94rem;
}
.feature-item-bullet {
  width: 20px; height: 20px; border-radius: 50%; background: rgba(156,66,33,.12);
  color: var(--saffron); display: flex; align-items: center; justify-content: center;
  font-size: .75rem; flex-shrink: 0; font-weight: 700; margin-top: 2px;
}

/* =========================================================
   Handcrafted Artisanal & Draftsman Elements
   ========================================================= */

/* Rubber Stamp (Ink-Pressed Letterpress Look) */
.rubber-stamp {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-weight: 700;
  font-size: .68rem;
  letter-spacing: .12em;
  border: 2px dashed var(--saffron);
  color: var(--saffron);
  padding: .3em .75em;
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: .4em;
  transform: rotate(-1.5deg);
  background: rgba(156, 66, 33, 0.04);
  box-shadow: 0 0 0 1px rgba(156, 66, 33, 0.12) inset;
}
.rubber-stamp-green {
  border-color: var(--forest);
  color: var(--forest);
  background: rgba(45, 90, 67, 0.05);
  box-shadow: 0 0 0 1px rgba(45, 90, 67, 0.12) inset;
}
.rubber-stamp-blue {
  border-color: var(--sky);
  color: var(--sky);
  background: rgba(30, 58, 95, 0.05);
  box-shadow: 0 0 0 1px rgba(30, 58, 95, 0.12) inset;
}

/* Embossed Circular Seal */
.seal-round {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--forest);
  color: var(--forest);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 8px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: .06em;
  transform: rotate(3deg);
  background: rgba(45, 90, 67, 0.04);
}

/* Draftsman Box with Corner Registration Crosshairs */
.draftsman-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 28px;
  border-radius: 2px;
}
.draftsman-card::before, .draftsman-card::after {
  content: '+';
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-45);
  line-height: 1;
}
.draftsman-card::before { top: 6px; left: 8px; }
.draftsman-card::after { bottom: 6px; right: 8px; }

/* Caliper Dimension Marker */
.caliper-dimension {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--ink-70);
  display: inline-flex;
  align-items: center;
  gap: .3em;
  background: var(--paper-2);
  padding: .25em .6em;
  border: 1px solid var(--line);
  border-radius: 2px;
}

/* Perforation / Tear Strip */
.perforation-line {
  background-image: linear-gradient(to right, var(--ink-45) 50%, transparent 50%);
  background-size: 8px 1px;
  background-repeat: repeat-x;
  height: 1px;
  margin: 18px 0;
}

/* Engineer's Marginal Note / Annotation */
.marginalia {
  font-family: var(--font-display);
  font-style: italic;
  font-size: .88rem;
  color: var(--ink-70);
  padding-left: 14px;
  border-left: 2px solid var(--saffron);
  margin: 14px 0;
  line-height: 1.45;
}

/* System Index Card Tab */
.index-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ink-70);
}
.index-tab-tag {
  background: var(--paper-2);
  padding: .2em .6em;
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: .06em;
  border: 1px solid var(--line);
}