/* Sloan School — brand tokens from the logo */
:root {
  --navy: #04155e;
  --navy-2: #1b2c78;
  --navy-ink: #0a1440;
  --slate: #909095;
  --text: #2b2d38;
  --muted: #66666c;
  --line: #e2e3ea;
  --tint: #f5f6fa;
  --bg: #ffffff;
  --error: #b42318;
  --radius: 10px;
  --serif: 'Libre Caslon Text', Georgia, 'Times New Roman', serif;
  --sans: 'Montserrat', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 16px/1.65 var(--sans); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-underline-offset: 3px; }
a:hover { color: var(--navy-2); }
h1, h2, h3 { font-family: var(--serif); color: var(--navy); line-height: 1.2; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.4rem, 2.4vw, 1.85rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }
.sr, .skip:not(:focus) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip:focus { position: fixed; top: 8px; left: 8px; z-index: 50; background: #fff; padding: 8px 12px; }
.eyebrow { font: 600 .78rem/1.2 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--slate); margin-bottom: .9em; }
.lead { font-size: 1.12rem; color: var(--muted); max-width: 46ch; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4em; background: var(--navy); color: #fff;
  font: 600 .95rem/1 var(--sans); padding: .95em 1.4em; border-radius: 999px; border: 2px solid var(--navy);
  text-decoration: none; cursor: pointer; transition: background .15s, color .15s; }
.btn:hover { background: var(--navy-2); border-color: var(--navy-2); color: #fff; }
.btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid #8fa0e8; outline-offset: 2px; }
.btn-outline { background: transparent; color: var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-sm { padding: .65em 1.05em; font-size: .85rem; }
.btn-block { width: 100%; }
.link-arrow { font-weight: 600; text-decoration: none; }
.link-arrow:hover span { margin-left: 3px; }
.pill { display: inline-block; font: 600 .74rem/1 var(--sans); letter-spacing: .04em; padding: .5em .8em; border-radius: 999px;
  background: var(--navy); color: #fff; }
.pill-muted { background: #e9eaf0; color: var(--navy-ink); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 64px; height: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name { font: 700 1.55rem/1 var(--serif); color: var(--navy); text-transform: uppercase; letter-spacing: .04em; }
.brand-sub { font: 600 .62rem/1.3 var(--sans); color: var(--muted); text-transform: uppercase; letter-spacing: .14em; margin-top: 4px; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a:not(.btn) { color: var(--text); font-weight: 500; text-decoration: none; padding: 6px 0; border-bottom: 2px solid transparent; }
.site-nav a:not(.btn):hover, .site-nav a[aria-current] { color: var(--navy); border-bottom-color: var(--navy); }
.nav-toggle { display: none; }
@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px;
    background: none; border: 0; cursor: pointer; padding: 10px; }
  .nav-toggle span:not(.sr) { display: block; height: 2px; background: var(--navy); border-radius: 2px; }
  .site-nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 18px; }
  .site-nav.open { display: flex; }
  .site-nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .site-nav .btn { margin-top: 14px; }
  .brand-sub { font-size: .56rem; letter-spacing: .1em; }
}

/* Hero */
.hero { padding: 56px 0 64px; background: linear-gradient(180deg, #fff 0%, var(--tint) 100%); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 900px) { .hero { padding: 84px 0 92px; } .hero-grid { grid-template-columns: 1.15fr .85fr; gap: 64px; } }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.hero-note { font-size: .88rem; color: var(--muted); }
.hero-art img { width: 100%; max-width: 420px; margin: 0 auto; }
@media (max-width: 899px) { .hero-art { order: -1; } .hero-art img { max-width: 240px; } }

/* Sections */
.section { padding: 56px 0; }
@media (min-width: 900px) { .section { padding: 76px 0; } }
.section-tint { background: var(--tint); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.page-head { padding: 48px 0 40px; background: var(--tint); border-bottom: 1px solid var(--line); }
.page-head .lead { max-width: 60ch; }
.crumbs { margin-bottom: .6em; font-size: .9rem; }

/* Course cards */
.card-grid { display: grid; gap: 20px; }
@media (min-width: 760px) { .card-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; } }
.course-card { position: relative; background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--navy);
  border-radius: var(--radius); padding: 26px 24px 24px; display: flex; flex-direction: column; gap: 10px;
  transition: box-shadow .2s, transform .2s; }
.course-card:hover { box-shadow: 0 10px 28px rgba(4,21,94,.10); transform: translateY(-2px); }
.course-card h3 { margin: 4px 0 0; }
.course-card h3 a { text-decoration: none; color: var(--navy); }
.course-card h3 a::after { content: ''; position: absolute; inset: 0; }
.course-card p { color: var(--muted); margin: 0; flex: 1; }
.course-meta { display: flex; flex-wrap: wrap; gap: 8px; }

/* Sessions */
.sessions { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.session { display: grid; grid-template-columns: auto 1fr; gap: 14px 18px; align-items: center; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.session > .btn, .session > .pill { grid-column: 1 / -1; justify-self: start; }
@media (min-width: 640px) { .session { grid-template-columns: auto 1fr auto; } .session > .btn, .session > .pill { grid-column: auto; } }
.session-date { width: 58px; text-align: center; border-right: 1px solid var(--line); padding-right: 14px; }
.session-date .mon { display: block; font: 600 .72rem/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--slate); }
.session-date .day { display: block; font: 700 1.7rem/1.1 var(--serif); color: var(--navy); }
.session-body { display: flex; flex-direction: column; gap: 2px; }
.session-course { font-weight: 600; text-decoration: none; }
.session-when { font-weight: 500; }
.session-where { font-size: .9rem; color: var(--muted); }
.empty-note { background: #fff; border: 1px dashed #c6c9d6; border-radius: var(--radius); padding: 28px; max-width: 720px; }

/* Facts strip */
.facts { display: grid; gap: 16px; }
@media (min-width: 720px) { .facts { grid-template-columns: repeat(3, 1fr); } }
.fact { padding: 22px 0; border-top: 2px solid var(--navy); display: flex; flex-direction: column; gap: 4px; }
.fact-num { font: 700 1.9rem/1.1 var(--serif); color: var(--navy); }
.fact-label { font: 600 .78rem/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.instructor > div { max-width: 760px; }

/* Course detail */
.detail-grid { display: grid; gap: 40px; }
@media (min-width: 900px) { .detail-grid { grid-template-columns: minmax(0, 1fr) 320px; gap: 64px; align-items: start; } }
.detail-main h2 { margin-top: 1.6em; }
.detail-main h2:first-child { margin-top: 0; }
.detail-side { background: var(--tint); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
@media (min-width: 900px) { .detail-side { position: sticky; top: 96px; } }
.facts-list { margin: 0 0 20px; }
.facts-list > div { padding: 10px 0; border-bottom: 1px solid var(--line); }
.facts-list dt { font: 600 .72rem/1.3 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--slate); }
.facts-list dd { margin: 2px 0 0; font-weight: 500; }
.checklist { list-style: none; padding: 0; margin: 0 0 1em; display: grid; gap: 8px; }
.checklist li { position: relative; padding-left: 28px; }
.checklist li::before { content: ''; position: absolute; left: 4px; top: .5em; width: 10px; height: 6px;
  border-left: 2px solid var(--navy); border-bottom: 2px solid var(--navy); transform: rotate(-45deg); }
.person { display: flex; gap: 20px; align-items: flex-start; margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.person img { border-radius: 50%; width: 120px; height: 120px; object-fit: cover; flex: none; }

/* Forms */
.form { display: flex; flex-direction: column; gap: 18px; }
.form-row.two { display: grid; gap: 18px; }
@media (min-width: 640px) { .form-row.two { grid-template-columns: 1fr 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 600; font-size: .92rem; color: var(--navy-ink); }
.req { color: var(--error); }
.field input, .field select, .field textarea { font: inherit; color: var(--text); background: #fff; width: 100%;
  border: 1px solid #c9cbd6; border-radius: 8px; padding: 12px 14px; min-height: 48px; }
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--navy); }
.has-error input, .has-error select, .has-error textarea { border-color: var(--error); }
.hint { font-size: .84rem; color: var(--muted); }
.error { font-size: .86rem; color: var(--error); font-weight: 500; }
.alert { background: #fef3f2; border: 1px solid #fecdca; color: var(--error); padding: 12px 16px; border-radius: 8px; }
.hp { position: absolute; left: -9999px; }
.form .btn { align-self: flex-start; }
.thanks { padding: 80px 0; }

/* Footer */
.site-footer { background: var(--navy-ink); color: #c9cde0; padding: 56px 0 24px; margin-top: 0; }
.site-footer a { color: #fff; }
.footer-grid { display: grid; gap: 32px; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 200px 1fr 1.3fr; gap: 48px; } }
.footer-logo { width: 160px; background: #fff; border-radius: 10px; padding: 12px; }
.footer-h { font: 600 .78rem/1.2 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: #fff; margin-bottom: 12px; }
.site-footer p { font-size: .92rem; }
.footer-base { border-top: 1px solid rgba(255,255,255,.12); margin-top: 32px; padding-top: 18px; font-size: .82rem; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
a[href^="tel:"] { white-space: nowrap; }
.btn:disabled { opacity: .5; cursor: not-allowed; }