/* ==========================================================================
   Farzaneh Heidari — academic site
   Minimal by design: two fonts, one accent, whitespace does the work.
   ========================================================================== */

:root {
  /* near-white surfaces */
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --surface: #ffffff;
  --border: #ebebef;
  --border-strong: #dcdce2;

  /* text — hierarchy via weight/size, not colour */
  --text: #1a1a1f;
  --text-soft: #565661;
  --text-faint: #8b8b96;

  /* one accent, used sparingly */
  --accent: #4f46e5;
  --accent-soft: #f0efff;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Newsreader", ui-serif, Georgia, "Times New Roman", serif;

  --maxw: 940px;
  --maxw-wide: 1080px;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 3px rgba(20, 20, 40, 0.05);
  --shadow-hover: 0 6px 24px rgba(20, 20, 40, 0.07);
  --space: clamp(4rem, 9vw, 7rem);
  --header-h: 68px;
}

[data-theme="dark"] {
  --bg: #0f0f13;
  --bg-soft: #131318;
  --surface: #16161c;
  --border: #26262e;
  --border-strong: #33333d;
  --text: #ededf2;
  --text-soft: #a6a6b3;
  --text-faint: #71717f;
  --accent: #a29bff;
  --accent-soft: #1c1b2e;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.45);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.3s ease, color 0.3s ease;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 500; line-height: 1.15; letter-spacing: -0.015em; color: var(--text); margin: 0; }
h1 { font-size: clamp(2.4rem, 5.5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
h3 { font-size: 1.2rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1.1rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
::selection { background: var(--accent-soft); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1.25rem, 5vw, 2rem); }
.container--wide { max-width: var(--maxw-wide); }
.section { padding: var(--space) 0; }
.section + .section { border-top: 1px solid var(--border); }
.muted { color: var(--text-soft); }
.faint { color: var(--text-faint); }
.center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* small section label */
.kicker {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 1rem;
}

/* ---------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--maxw-wide); margin: 0 auto; padding: 0 clamp(1.25rem, 5vw, 2rem);
}
.brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-serif); font-weight: 600; font-size: 1.08rem; color: var(--text); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 26px; height: 26px; flex: none; border-radius: 7px; }
.nav-links { display: flex; align-items: center; gap: 0.15rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--text-soft); font-size: 0.92rem; font-weight: 500;
  padding: 0.4rem 0.7rem; border-radius: 8px;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.active { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 0.3rem; }

.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 9px;
  background: transparent; border: 1px solid transparent; color: var(--text-soft); cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }
.icon-btn svg { width: 19px; height: 19px; }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-toggle { display: inline-grid; }
  .nav-links {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--border);
    padding: 0.6rem clamp(1.25rem, 5vw, 2rem) 1rem;
    transform: translateY(-6px); opacity: 0; pointer-events: none;
    transition: opacity 0.16s ease, transform 0.16s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 0.7rem 0.2rem; font-size: 1rem; border-bottom: 1px solid var(--border); }
  .nav-links li:last-child a { border-bottom: 0; }
}

/* ------------------------------------------------------------------- hero */
.hero { padding: clamp(3.5rem, 9vw, 6.5rem) 0 var(--space); }
.hero-layout { display: grid; grid-template-columns: 1fr 300px; gap: clamp(2rem, 6vw, 4.5rem); align-items: center; }
@media (max-width: 820px) { .hero-layout { grid-template-columns: 1fr; gap: 2.5rem; } .hero-portrait { order: -1; } }
.hero-eyebrow { font-size: 0.82rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.4rem; }
.hero h1 { margin-bottom: 1rem; }
.hero .role { font-size: 1.2rem; color: var(--text); font-weight: 500; margin-bottom: 0.3rem; }
.hero .affil { color: var(--text-faint); font-size: 1rem; margin-bottom: 1.8rem; }
.hero .lede { font-size: 1.16rem; color: var(--text-soft); max-width: 46ch; margin-bottom: 2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; align-items: center; }

.hero-portrait { width: 300px; max-width: 72vw; aspect-ratio: 4 / 5; justify-self: end; }
@media (max-width: 820px) { .hero-portrait { justify-self: start; width: 240px; } }
.hero-portrait .frame { width: 100%; height: 100%; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--bg-soft); }
.hero-portrait img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 30%; }
.portrait-fallback {
  width: 100%; height: 100%; display: grid; place-items: center;
  font-family: var(--font-serif); font-weight: 500; font-size: 3rem; color: var(--accent);
  background: var(--accent-soft);
}

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-weight: 500; font-size: 0.94rem; line-height: 1;
  padding: 0.72rem 1.15rem; border-radius: 9px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--text-faint); text-decoration: none; }
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent); border-color: var(--accent); opacity: 0.92; color: #fff; }
.btn--sm { padding: 0.5rem 0.85rem; font-size: 0.86rem; }
.textlink { color: var(--accent); font-weight: 500; font-size: 0.94rem; }

/* -------------------------------------------------------------- section head */
.section-head { margin-bottom: 2.5rem; }
.section-head h2 { max-width: 24ch; }
.section-head p { margin: 0.7rem 0 0; color: var(--text-soft); max-width: 52ch; }
.head-row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* --------------------------------------------------------------- chips */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 0; list-style: none; }
.chip {
  font-size: 0.86rem; font-weight: 500; color: var(--text-soft);
  border: 1px solid var(--border); padding: 0.35rem 0.8rem; border-radius: 999px;
}

/* --------------------------------------------------------- project cards */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.2rem; }
.pcard {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.pcard:hover { border-color: var(--border-strong); box-shadow: var(--shadow-hover); }
.pcard-thumb { display: block; height: 130px; background: var(--accent-soft); border-bottom: 1px solid var(--border); }
.pcard-thumb .thumb-svg { width: 100%; height: 100%; display: block; }
.pcard-body { display: flex; flex-direction: column; gap: 0.7rem; padding: 1.35rem 1.5rem 1.4rem; flex: 1; }
.pcard h3 { font-size: 1.24rem; font-family: var(--font-serif); font-weight: 600; letter-spacing: -0.01em; }
.pcard h3 a { color: var(--text); }
.pcard h3 a:hover { color: var(--accent); text-decoration: none; }
.pcard .teaser { color: var(--text-soft); font-size: 0.96rem; margin: 0; flex: 1; }
.pcard-links { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 0.9rem; margin-top: 0.4rem; }
.pcard-links .details { margin-left: auto; font-size: 0.88rem; font-weight: 500; color: var(--accent); }
.pcard-links .details:hover { text-decoration: none; }

/* status badge — neutral by default; accent for confirmed work */
.badge {
  display: inline-flex; align-items: center; gap: 0.4rem; align-self: flex-start;
  font-size: 0.74rem; font-weight: 600; letter-spacing: 0.02em;
  padding: 0.26rem 0.62rem; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text-soft); background: transparent;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--text-faint); }
.badge--accepted, .badge--published { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 30%, var(--border)); }
.badge--accepted::before, .badge--published::before { background: var(--accent); }

/* inline link pills (publications, cards, detail) */
.pill {
  display: inline-flex; align-items: center; gap: 0.34rem;
  font-size: 0.85rem; font-weight: 500; color: var(--text-soft);
}
.pill:hover { color: var(--accent); text-decoration: none; }
.pill svg { width: 14px; height: 14px; }

/* -------------------------------------------------------- publications */
.pub-controls { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 2rem; }
.pub-controls button {
  font: inherit; font-size: 0.86rem; font-weight: 500; cursor: pointer;
  padding: 0.35rem 0.85rem; border-radius: 999px;
  border: 1px solid var(--border); background: transparent; color: var(--text-soft);
  transition: color 0.15s, border-color 0.15s;
}
.pub-controls button:hover { color: var(--text); border-color: var(--border-strong); }
.pub-controls button.active { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, var(--border)); }

.pub-list { display: flex; flex-direction: column; }
.pub { display: grid; grid-template-columns: 56px 1fr; gap: 1.2rem; padding: 1.6rem 0; border-top: 1px solid var(--border); }
.pub:first-child { border-top: 0; }
.pub-year { font-family: var(--font-serif); font-size: 1.05rem; color: var(--text-faint); padding-top: 0.15rem; }
.pub-main h3 { font-size: 1.12rem; font-family: var(--font-serif); font-weight: 600; line-height: 1.3; margin-bottom: 0.4rem; }
.pub-main h3 a { color: var(--text); }
.pub-main h3 a:hover { color: var(--accent); text-decoration: none; }
.pub-authors { color: var(--text-soft); font-size: 0.92rem; margin: 0 0 0.15rem; }
.pub-venue { color: var(--text-faint); font-size: 0.9rem; font-style: italic; margin: 0 0 0.85rem; }
.pub-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1rem; align-items: center; }
@media (max-width: 520px) { .pub { grid-template-columns: 1fr; gap: 0.4rem; } }

/* --------------------------------------------------------------- prose */
.prose { max-width: 68ch; }
.prose p, .prose li { color: var(--text-soft); }
.prose h2 { margin: 2.8rem 0 1rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 2rem 0 0.6rem; }
.prose ul { padding-left: 1.15rem; margin: 0 0 1.1rem; }
.prose li { margin-bottom: 0.5rem; }
.prose strong { color: var(--text); font-weight: 600; }

/* ------------------------------------------------------ project detail */
.detail-hero { padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(2rem, 4vw, 3rem); border-bottom: 1px solid var(--border); }
.breadcrumb { font-size: 0.86rem; color: var(--text-faint); margin-bottom: 1.4rem; }
.breadcrumb a { color: var(--text-soft); }
.detail-hero h1 { font-size: clamp(2rem, 4.5vw, 2.9rem); margin: 0.8rem 0 0.8rem; }
.detail-hero .subtitle { font-size: 1.15rem; color: var(--text-soft); max-width: 52ch; margin: 0; }
.detail-cat { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); }
.detail-authors { color: var(--text); font-size: 1.05rem; margin: 1rem 0 0; }
.detail-authors strong { font-weight: 600; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 0.6rem 1rem; align-items: center; color: var(--text-soft); font-size: 0.92rem; margin-top: 0.8rem; }
.detail-venue em { font-style: italic; }
.detail-links { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.6rem; }
.detail-body h2 { font-size: 1.35rem; }
.figure-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin: 0.5rem 0 1.1rem; }
.figure-grid figure { margin: 0; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: var(--surface); }
.figure-grid img { width: 100%; background: #fff; }
.figure-grid figcaption { font-size: 0.83rem; color: var(--text-faint); padding: 0.65rem 0.85rem; }
.poster-embed { width: 100%; aspect-ratio: 16 / 9; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: var(--bg-soft); margin: 0.4rem 0 1rem; }
.poster-embed iframe { width: 100%; height: 100%; border: 0; display: block; }
@media (max-width: 620px) { .poster-embed { aspect-ratio: 3 / 4; } }
.todo-note {
  border: 1px dashed var(--border-strong); border-radius: var(--radius-sm);
  padding: 0.85rem 1.05rem; color: var(--text-soft); font-size: 0.92rem; background: var(--bg-soft);
}
.todo-note code { font-size: 0.85em; background: var(--surface); border: 1px solid var(--border); padding: 0.05rem 0.35rem; border-radius: 5px; }

/* -------------------------------------------------------------- timeline */
.timeline { display: flex; flex-direction: column; }
.tl-item { display: grid; grid-template-columns: 92px 1fr; gap: 1.4rem; padding: 1.3rem 0; border-top: 1px solid var(--border); }
.tl-item:first-child { border-top: 0; }
.tl-date { font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-faint); padding-top: 0.1rem; }
.tl-body { color: var(--text-soft); }
@media (max-width: 520px) { .tl-item { grid-template-columns: 1fr; gap: 0.3rem; } }

/* ------------------------------------------------------------ layout */
.split { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 820px) { .split { grid-template-columns: 1fr; gap: 2.5rem; } }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.stack { display: flex; flex-direction: column; gap: 1.5rem; }

.info-block h3 { margin-bottom: 0.9rem; }
.info-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem 1.5rem; }
.info-card h3 { margin-bottom: 0.9rem; }
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li { padding: 0.85rem 0; border-top: 1px solid var(--border); }
.info-list li:first-child { border-top: 0; padding-top: 0; }
.info-list .primary { color: var(--text); font-weight: 600; }
.info-list .secondary { color: var(--text-soft); font-size: 0.9rem; }
.info-list .period { color: var(--text-faint); font-size: 0.82rem; float: right; margin-left: 1rem; }

.about-portrait { width: 100%; aspect-ratio: 4 / 5; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--bg-soft); }
.about-portrait img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 30%; }

.social-row { display: flex; flex-wrap: wrap; gap: 0.5rem 1.3rem; }
.social-row a { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.92rem; color: var(--text-soft); font-weight: 500; }
.social-row a:hover { color: var(--accent); text-decoration: none; }
.social-row svg { width: 17px; height: 17px; }

.contact-lead { font-family: var(--font-serif); font-size: clamp(1.5rem, 4vw, 2.4rem); font-weight: 500; letter-spacing: -0.01em; }
.contact-lead a { color: var(--text); border-bottom: 2px solid var(--accent-soft); }
.contact-lead a:hover { color: var(--accent); text-decoration: none; }

/* --------------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--border); padding: 2.5rem 0; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; align-items: center; max-width: var(--maxw-wide); margin: 0 auto; padding: 0 clamp(1.25rem, 5vw, 2rem); }
.footer-inner p { margin: 0; color: var(--text-faint); font-size: 0.86rem; }
.footer-nav { display: flex; gap: 1.3rem; flex-wrap: wrap; }
.footer-nav a { color: var(--text-soft); font-size: 0.86rem; }

/* ---------------------------------------------------------------- blog */
.post-hero { padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(1.6rem, 3vw, 2.2rem); border-bottom: 1px solid var(--border); }
.post-hero .breadcrumb { margin-bottom: 1.2rem; }
.post-hero h1 { font-size: clamp(2rem, 4.8vw, 3.1rem); margin: 0.6rem 0 1rem; max-width: 20ch; }
.post-hero .dek { font-size: 1.15rem; color: var(--text-soft); max-width: 56ch; margin: 0; }
.post-meta { color: var(--text-faint); font-size: 0.9rem; display: flex; flex-wrap: wrap; gap: 0.4rem 0.8rem; align-items: center; }
.post-body { padding: clamp(2rem, 5vw, 3.5rem) 0 var(--space); }
.post-body .prose { margin: 0 auto; }
.post-body h2 { margin: 2.8rem 0 1rem; }
.post-body h2:first-of-type { margin-top: 0; }
.post-body figure { margin: 2rem 0; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: var(--surface); }
.post-body figure img { width: 100%; background: #fff; display: block; }
.post-body figure figcaption { font-size: 0.85rem; color: var(--text-faint); padding: 0.75rem 0.95rem; }

/* key-idea callout */
.callout { border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1rem 1.25rem; margin: 1.8rem 0; }
.callout p { color: var(--text); margin: 0; }
.callout p + p { margin-top: 0.6rem; }
.callout .label { display: block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.45rem; }

/* project "how it works" diagram + In-brief explainer */
.callout.nutshell { margin: 0 0 1.2rem; }
.diagram-fig { margin: 0.4rem 0 1.6rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); padding: 1.2rem 1.1rem 0.4rem; }
.diagram-fig .diagram-svg { width: 100%; height: auto; display: block; }
.diagram-fig figcaption { text-align: center; font-size: 0.76rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--text-faint); padding: 0.7rem 0 0.3rem; }
@keyframes dgflow { to { stroke-dashoffset: -12; } }
@keyframes dgpulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }
.diagram-svg .dg-flow { stroke-dasharray: 6 6; animation: dgflow 1.05s linear infinite; }
.diagram-svg .dg-pulse { animation: dgpulse 2.2s ease-in-out infinite; }

/* unifying diagram */
.diagram { width: 100%; height: auto; display: block; margin: 1.6rem 0; }
.diagram-wrap { border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); padding: 1.4rem; margin: 1.8rem 0; }
.diagram-wrap figcaption { font-size: 0.85rem; color: var(--text-faint); margin-top: 0.6rem; text-align: center; }

/* compact comparison table */
.post-body .table-wrap { overflow-x: auto; margin: 1.6rem 0; }
.post-body table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
.post-body th, .post-body td { text-align: left; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.post-body thead th { color: var(--text-faint); font-weight: 600; font-size: 0.8rem; letter-spacing: 0.03em; text-transform: uppercase; }
.post-body tbody tr:last-child td { border-bottom: 0; }

/* KaTeX: keep long display math scrollable on mobile */
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.3rem 0; margin: 1.3rem 0; }
.katex { font-size: 1.05em; }

/* subtle scroll reveal (scroll-triggered, not autoplay) */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.in { opacity: 1; transform: none; }

/* utilities */
.mt-1 { margin-top: 0.6rem; } .mt-2 { margin-top: 1.1rem; } .mt-3 { margin-top: 1.8rem; } .mt-4 { margin-top: 2.6rem; }
.mb-0 { margin-bottom: 0; }