/* ═══════════════════════════════════════════════
   Học Viện Seller — Design System v2.0
   Brand: Archivo + IBM Plex Sans + IBM Plex Mono
   KV: "Sổ tay nghiệp vụ" — ledger aesthetic
   ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@600;700;800;900&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --ink: #0E2622;
  --ink-soft: #173832;
  --orange: #F2521C;
  --orange-2: #FF7A3D;
  --paper: #EFEAD9;
  --paper-2: #E4DEC7;
  --line: #C9C0A2;
  --line-dark: #2A4B44;
  --muted: #5B6D66;
  --white: #FFFFFF;
  --display: 'Archivo', sans-serif;
  --body: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
  --wrap: 1180px;
  --radius: 2px;
  --success: #10b981;
  --danger: #ef4444;
}

/* ─── RESET ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration: none; transition: color .2s; }
a:hover { color: var(--orange); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.12;
}

/* ─── CONTAINERS ─────────────────────────────── */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ─── DOCBAR (top info strip) ────────────────── */
.docbar {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 9px 0;
}
.docbar .wrap { display: flex; justify-content: space-between; align-items: center; }
.docbar span { opacity: .65; }

/* ─── HEADER ─────────────────────────────────── */
.header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0;
}
.header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.header__logo { display: flex; align-items: center; flex-shrink: 0; }
.header__logo img { height: 36px; width: auto; }

.header__nav {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.header__nav::-webkit-scrollbar { display: none; }
.header__nav a {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  padding: 22px 14px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}
.header__nav a:hover { color: var(--ink); border-bottom-color: var(--line); }
.header__nav a.active { color: var(--orange); border-bottom-color: var(--orange); }

.header__cta {
  display: inline-block;
  background: var(--orange);
  color: var(--ink);
  font-family: var(--display);
  font-weight: 700;
  font-size: 12px;
  padding: 10px 18px;
  text-transform: uppercase;
  letter-spacing: .02em;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background .2s;
}
.header__cta:hover { background: var(--orange-2); color: var(--ink); }

.header__menu-btn {
  display: none;
  background: none;
  border: 1.5px solid var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 8px 14px;
  cursor: pointer;
  color: var(--ink);
}

/* ─── EYEBROW (category labels) ──────────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
  display: block;
  margin-bottom: 10px;
}

/* ─── DIAGONAL CUT (brand signature) ────────── */
.cut {
  height: 48px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 40%, 100% 100%, 0 60%);
}

/* ─── BREADCRUMB ─────────────────────────────── */
.crumb {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: 20px 0 16px;
}
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--orange); }
.crumb b { color: var(--ink); font-weight: 600; }

/* ═══════════════════════════════════════════════
   HOMEPAGE
   ═══════════════════════════════════════════════ */

/* ─── HERO ───────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 28px;
}
.hero-main {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
  min-height: 380px;
  display: flex;
  flex-direction: column;
}
.hero-main__img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.hero-main__content {
  padding: 24px 28px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.hero-main__content .eyebrow { color: var(--orange-2); }
.hero-main__content h2 {
  font-size: 24px;
  color: var(--paper);
  margin-bottom: 10px;
  line-height: 1.2;
}
.hero-main__content h2 a { color: var(--paper); }
.hero-main__content h2 a:hover { color: var(--orange-2); }
.hero-main__content p {
  font-size: 14px;
  color: #A9C0BA;
  line-height: 1.6;
  margin-bottom: 12px;
}
.hero-main__meta {
  font-family: var(--mono);
  font-size: 11px;
  color: #7B948C;
  letter-spacing: .03em;
}

/* Hero side cards */
.hero-side {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-side-card {
  background: var(--ink-soft);
  color: var(--paper);
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.hero-side-card__thumb {
  width: 100%;
  height: 100px;
  object-fit: cover;
}
.hero-side-card__body {
  padding: 16px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.hero-side-card__body .eyebrow { color: var(--orange-2); font-size: 10px; }
.hero-side-card__body h3 { font-size: 14px; color: var(--paper); font-weight: 700; }
.hero-side-card__body h3 a { color: var(--paper); }
.hero-side-card__body h3 a:hover { color: var(--orange-2); }

/* ─── CATEGORY STRIP (tab bar) ───────────────── */
.cat-strip {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  background: var(--white);
  overflow-x: auto;
  margin-bottom: 28px;
  scrollbar-width: none;
}
.cat-strip::-webkit-scrollbar { display: none; }
.cat-strip a {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 13px 18px;
  border-right: 1px solid var(--line);
  white-space: nowrap;
  color: var(--muted);
  transition: background .15s, color .15s;
}
.cat-strip a:last-child { border-right: none; }
.cat-strip a:hover { background: var(--paper-2); color: var(--ink); }
.cat-strip a.active { background: var(--orange); color: var(--white); }

/* ─── MAIN GRID (feed + sidebar) ─────────────── */
.main-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

/* ─── FEED LIST ──────────────────────────────── */
.feed-list { display: flex; flex-direction: column; gap: 0; }

.feed-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-bottom: none;
  background: var(--white);
  transition: background .15s;
}
.feed-item:last-child { border-bottom: 1px solid var(--line); }
.feed-item:hover { background: var(--paper); }
.feed-item__thumb {
  width: 100%;
  height: 100px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--ink-soft), #2A544C);
}
.feed-item__body { display: flex; flex-direction: column; }
.feed-item__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.3;
  margin-bottom: 6px;
}
.feed-item__title a { color: var(--ink); }
.feed-item__title a:hover { color: var(--orange); }
.feed-item__excerpt {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: auto;
}
.feed-item__meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: .03em;
  margin-top: 8px;
}

/* ─── PAGINATION ─────────────────────────────── */
.pagination {
  display: flex;
  gap: 6px;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  margin-top: 20px;
}
.pagination a, .pagination span {
  border: 1px solid var(--line);
  padding: 8px 14px;
  color: var(--muted);
  background: var(--white);
  transition: all .15s;
}
.pagination a:hover { background: var(--paper-2); color: var(--ink); }
.pagination .current {
  background: var(--orange);
  color: var(--white);
  border-color: var(--orange);
}

/* ─── SIDEBAR ────────────────────────────────── */
.sidebar { display: flex; flex-direction: column; gap: 0; }

.sidebar-widget {
  padding: 22px;
  border: 1px solid var(--line);
  border-bottom: none;
  background: var(--white);
}
.sidebar-widget:last-child { border-bottom: 1px solid var(--line); }
.sidebar-widget__title {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ink);
  margin-bottom: 16px;
  font-weight: 600;
}

/* Popular rows */
.popular-row {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  align-items: flex-start;
}
.popular-row:last-child { border-bottom: none; }
.popular-row__num {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--line);
  font-weight: 700;
  width: 28px;
  flex-shrink: 0;
  line-height: 1.2;
}
.popular-row__title a {
  font-family: var(--display);
  font-weight: 700;
  font-size: 14px;
  line-height: 1.35;
  color: var(--ink);
}
.popular-row__title a:hover { color: var(--orange); }

/* ─── FORM FIELDS (brand style: underline) ──── */
.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 6px;
}
.field input, .field select {
  width: 100%;
  border: none;
  border-bottom: 1.5px solid var(--ink);
  background: transparent;
  padding: 8px 2px;
  font-family: var(--body);
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: border-color .2s;
}
.field input:focus, .field select:focus { border-bottom-color: var(--orange); }
.field input::placeholder { color: var(--line); }
.field textarea {
  width: 100%;
  border: none;
  border-bottom: 1.5px solid var(--ink);
  background: transparent;
  padding: 8px 2px;
  font-family: var(--body);
  font-size: 14px;
  color: var(--ink);
  resize: vertical;
  min-height: 60px;
  outline: none;
}
.field textarea:focus { border-bottom-color: var(--orange); }
.field .req { color: var(--orange); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 18px;
}

.f-check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 14px 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}
.f-check input[type="checkbox"] { margin-top: 3px; accent-color: var(--orange); }
.f-check a { color: var(--orange); }

.widget-submit {
  display: block;
  width: 100%;
  background: var(--orange);
  color: var(--white);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 13px 20px;
  border: none;
  cursor: pointer;
  transition: background .2s;
  margin-top: 8px;
}
.widget-submit:hover { background: var(--orange-2); }

.muted-text { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ─── ALERTS ─────────────────────────────────── */
.alert { padding: 12px 16px; font-size: 13px; margin-bottom: 14px; border-left: 3px solid; }
.alert-success { background: #ecfdf5; border-color: var(--success); color: #065f46; }
.alert-danger { background: #fef2f2; border-color: var(--danger); color: #991b1b; }

/* ─── BANNER ─────────────────────────────────── */
.banner {
  height: 100px;
  border: 1px solid var(--line);
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 28px 0;
}
.banner span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .04em;
}

/* ─── SECTION LABEL ──────────────────────────── */
.section-lbl {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 16px;
  border-left: 3px solid var(--orange);
  padding-left: 12px;
}

/* ─── CARD GRID ──────────────────────────────── */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: var(--line); border: 1px solid var(--line); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; background: var(--line); border: 1px solid var(--line); }

.card {
  background: var(--white);
  position: relative;
  overflow: hidden;
}
/* corner fold — brand signature */
.card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 24px 24px 0;
  border-color: transparent var(--paper) transparent transparent;
  z-index: 2;
}
.card__thumb {
  width: 100%;
  height: 140px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--ink-soft), #2A544C);
}
.card__body { padding: 16px 18px 20px; }
.card__cat {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--orange);
  letter-spacing: .08em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}
.card__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.35;
  margin-bottom: 6px;
}
.card__title a { color: var(--ink); }
.card__title a:hover { color: var(--orange); }
.card__date {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: .03em;
}

/* ═══════════════════════════════════════════════
   CATEGORY PAGE
   ═══════════════════════════════════════════════ */
.cat-header {
  padding: 24px 0 20px;
}
.cat-header__title {
  font-size: 28px;
  margin-bottom: 8px;
}
.cat-header__desc {
  font-size: 15px;
  color: var(--muted);
  max-width: 600px;
}
.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border: 1px solid var(--line);
  background: var(--white);
  margin-bottom: 20px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .03em;
}

/* ═══════════════════════════════════════════════
   ARTICLE DETAIL
   ═══════════════════════════════════════════════ */
.art-header { margin-bottom: 20px; }
.art-title {
  font-size: clamp(24px, 4vw, 36px);
  margin-bottom: 12px;
}
.art-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .03em;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.share-row {
  display: flex;
  gap: 16px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: .04em;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.share-btn { cursor: pointer; transition: color .2s; }
.share-btn:hover { color: var(--orange); }

.art-hero {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  margin-bottom: 32px;
  border: 1px solid var(--line);
}

/* Article 2-column grid */
.art-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
  margin-bottom: 48px;
}

.art-body {
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
}
.art-body p { margin-bottom: 20px; }
.art-body h2, .art-body h3, .art-body h4 {
  margin-top: 32px;
  margin-bottom: 12px;
}
.art-body h4 {
  font-size: 18px;
  font-weight: 700;
}
.art-body ul, .art-body ol {
  padding-left: 20px;
  margin-bottom: 20px;
}
.art-body li { margin-bottom: 8px; }
.art-body blockquote {
  border-left: 3px solid var(--orange);
  padding: 16px 24px;
  margin: 24px 0;
  font-style: italic;
  color: var(--muted);
  background: var(--paper-2);
}
.art-body strong { font-weight: 600; }
.art-body img {
  border: 1px solid var(--line);
  margin: 24px 0;
}

/* Article sidebar (right) */
.art-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.art-sidebar .sidebar-widget {
  border: 1px solid var(--line);
  border-bottom: none;
}
.art-sidebar .sidebar-widget:last-child { border-bottom: 1px solid var(--line); }
.art-sidebar__sticky {
  position: sticky;
  top: 80px;
}

/* Author box */
.author-box {
  display: flex;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--white);
  align-items: center;
  margin-top: 32px;
}
.author-box__avatar {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 50%;
}
.author-box__name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
}
.author-box__role {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .03em;
  margin-top: 2px;
}

/* ═══════════════════════════════════════════════
   CONTACT PAGE
   ═══════════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 48px;
}
.contact-info {
  background: var(--ink);
  color: var(--paper);
  padding: 36px 32px;
}
.contact-info h3 {
  font-size: 20px;
  color: var(--paper);
  margin-bottom: 16px;
}
.contact-info p { color: #A9C0BA; font-size: 15px; line-height: 1.7; }
.contact-details {
  margin-top: 28px;
  font-family: var(--mono);
  font-size: 12px;
  color: #A9C0BA;
  line-height: 2.2;
  letter-spacing: .02em;
}
.contact-form {
  background: var(--white);
  padding: 36px 32px;
}
.contact-form h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

/* ═══════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════ */
.footer {
  background: var(--ink);
  color: #7B948C;
  padding: 48px 0 0;
  margin-top: 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
}
.footer__logo {
  font-family: var(--display);
  font-weight: 800;
  font-size: 18px;
  color: var(--paper);
  display: block;
  margin-bottom: 14px;
}
.footer__desc {
  font-size: 13px;
  color: #7B948C;
  line-height: 1.7;
  max-width: 320px;
}
.footer__col-title {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--paper);
  margin-bottom: 14px;
  font-weight: 600;
}
.footer__link {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: #7B948C;
  margin-bottom: 10px;
  letter-spacing: .02em;
  transition: color .2s;
}
.footer__link:hover { color: var(--orange-2); }
.footer__bottom {
  border-top: 1px solid var(--line-dark);
  padding: 20px 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  color: #5B7B72;
  letter-spacing: .06em;
}

/* ═══════════════════════════════════════════════
   BUTTONS (brand style)
   ═══════════════════════════════════════════════ */
.btn { display: inline-block; font-family: var(--display); font-weight: 700; font-size: 13px; padding: 12px 24px; text-decoration: none; transition: all .2s; cursor: pointer; border: none; }
.btn-primary { background: var(--orange); color: var(--ink); }
.btn-primary:hover { background: var(--orange-2); color: var(--ink); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* ═══════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════ */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .main-grid { grid-template-columns: 1fr; }
  .art-grid { grid-template-columns: 1fr; }
  .art-sidebar__sticky { position: static; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .docbar { display: none; }
  .header__nav { display: none; }
  .header__menu-btn { display: block; }
  .header__nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
    z-index: 99;
    box-shadow: 0 8px 24px rgba(14,38,34,.1);
  }
  .header__nav.open a { padding: 14px 24px; border-bottom: none; border-left: 3px solid transparent; }
  .header__nav.open a.active { border-left-color: var(--orange); }
  .header .wrap { position: relative; }

  .feed-item { grid-template-columns: 1fr; }
  .feed-item__thumb { height: 160px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }

  .cat-strip a { padding: 11px 14px; font-size: 10px; }
}

/* ─── ABOUT PAGE ─────────────────────────────── */
.about-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0;
}
.about-split {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0;
}
.timeline { display: flex; flex-direction: column; gap: 24px; margin-top: 32px; }
.timeline-item { display: flex; gap: 24px; border-bottom: 1px solid var(--line); padding-bottom: 20px; }
.timeline-item:last-child { border-bottom: none; }
.timeline-dot { font-family: var(--mono); font-size: 16px; font-weight: bold; color: var(--orange); width: 80px; flex-shrink: 0; }

@media (max-width: 768px) {
  .about-hero, .about-split { grid-template-columns: 1fr; }
  .timeline-item { flex-direction: column; }
  .timeline-dot { width: auto; }
}