:root {
  --ink: #222;
  --muted: #66727a;
  --line: #d9e0e4;
  --soft: #f2f6f8;
  --navy: #0b1e3b;
  --cyan: #4fc3f7;
  --blue: #1e88e5;
  --yellow: #ffca28;
  --blue-dark: #145a8a;
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body { margin: 0; background: #fff; color: var(--ink); font-family: Arial, Helvetica, sans-serif; line-height: 1.65; }
a { color: inherit; }
.container { width: min(1080px, calc(100% - 48px)); margin: 0 auto; }

.site-header { background: #fff; border-bottom: 1px solid var(--line); }
.header-inner { width: min(1080px, calc(100% - 48px)); min-height: 74px; margin: 0 auto; display: flex; align-items: center; gap: 30px; }
.site-title { font-size: 18px; line-height: 1.2; font-weight: 400; white-space: nowrap; color: #111; text-decoration: none; }
.site-title:hover { color: var(--blue-dark); }
.site-nav { display: flex; gap: 21px; margin-left: auto; align-items: center; }
.site-nav a { padding: 26px 0 20px; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: #555; text-decoration: none; border-bottom: 3px solid transparent; }
.site-nav a:hover, .site-nav a.current { color: var(--blue-dark); border-bottom-color: var(--blue); }
.menu-toggle { display: none; margin-left: auto; border: 1px solid #bbb; background: #fff; border-radius: 2px; padding: 7px 10px; font-size: 12px; color: #555; }

.intro-banner { background-color: var(--navy); background-image: linear-gradient(90deg, rgba(11, 30, 59, .97) 0%, rgba(11, 30, 59, .84) 42%, rgba(11, 30, 59, .16) 100%), url('../../uspace2027-banner.png'); background-position: center; background-size: cover; color: #fff; border-bottom: 6px solid var(--cyan); }
.banner-inner { padding: 92px 0 88px; }
.subpage-banner { width: 100%; height: clamp(150px, 22vw, 300px); background-color: var(--navy); background-image: url('../../uspace2027-subpage-banner.png'); background-position: center; background-size: cover; border-bottom: 6px solid var(--cyan); }
.kicker { margin: 0 0 17px; color: var(--blue); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; }
.intro-banner .kicker { color: var(--cyan); }
.intro-banner h1 { max-width: 820px; margin: 0 0 24px; font-size: clamp(36px, 5vw, 62px); line-height: 1.1; font-weight: 300; letter-spacing: -.03em; }
.subtitle { max-width: 720px; margin: 0; color: #626262; font-size: 18px; line-height: 1.55; }
.intro-banner .subtitle { color: #e2ebef; }
.notice { margin: 30px 0 0; font-size: 13px; }
.notice strong { color: var(--yellow); }

.content-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(240px, 1fr); gap: 85px; padding-top: 70px; padding-bottom: 80px; }
.main-column { min-width: 0; }
.main-column h2, .narrow-content h2 { margin: 0 0 22px; font-size: 29px; line-height: 1.25; font-weight: 400; color: #222; }
.main-column h2:not(:first-child), .prose h2:not(:first-child) { margin-top: 47px; }
.main-column p, .prose li { color: #4f4f4f; font-size: 15px; }
.prose p { max-width: 720px; }
.button { display: inline-block; margin-top: 10px; padding: 10px 15px; color: #fff; background: var(--blue); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; text-decoration: none; }
.button:hover { background: var(--blue-dark); }
.side-column { border-left: 1px solid var(--line); padding-left: 28px; }
.side-block { padding: 0 0 28px; margin: 0 0 26px; border-bottom: 1px solid var(--line); }
.side-block:last-child { border-bottom: 0; }
.side-block h3 { margin: 0 0 16px; font-size: 17px; font-weight: 400; color: #333; }
.side-block p { font-size: 14px; color: #555; }
.facts { margin: 0; }
.facts div { display: flex; justify-content: space-between; gap: 15px; padding: 9px 0; border-bottom: 1px solid #e9e9e9; font-size: 13px; }
.facts div:last-child { border-bottom: 0; }
.facts dt { color: #555; }
.facts dd { margin: 0; color: var(--blue-dark); font-weight: 700; }
.small { font-size: 12px !important; color: #777 !important; }
.plain-list { padding: 0; margin: 0; list-style: none; }
.plain-list li { padding: 4px 0; color: #555; font-size: 14px; }
.plain-list li::before { content: '—'; color: var(--blue); margin-right: 9px; }

.grey-section { background: var(--soft); border-top: 1px solid #e6e6e6; padding: 62px 0 70px; }
.grey-section h2 { margin: 0 0 34px; font-size: 29px; font-weight: 400; }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #d7d7d7; border: 1px solid #d7d7d7; }
.topic-grid article { min-height: 175px; padding: 26px 25px; background: #fff; }
.topic-grid h3 { margin: 0 0 9px; font-size: 17px; font-weight: 400; color: var(--blue-dark); }
.topic-grid p { margin: 0; color: #5b5b5b; font-size: 13px; line-height: 1.55; }
.site-footer { background: var(--navy); color: #dceaf1; }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; padding: 24px 0; font-size: 12px; }
.footer-inner p { margin: 0; }

.page-heading { background: #eef2f4; border-bottom: 1px solid #dce2e5; }
.page-heading .container { padding: 60px 0 58px; }
.page-heading h1 { margin: 0 0 13px; font-size: 46px; line-height: 1.1; font-weight: 300; color: #222; }
.page-heading .subtitle { font-size: 17px; }
.topic-list { columns: 2; padding-left: 20px; }
.topic-list li { break-inside: avoid; padding: 4px 0; }
.narrow-content { max-width: 900px; padding-top: 60px; padding-bottom: 80px; }
.narrow-content > p { max-width: 720px; color: #555; }
.program-list { margin-top: 45px; border-top: 1px solid var(--line); }
.program-item { display: grid; grid-template-columns: 110px 1fr; gap: 27px; padding: 27px 0; border-bottom: 1px solid var(--line); }
.program-time { color: var(--blue-dark); font-size: 13px; font-weight: 700; }
.program-item h2 { margin: 5px 0 7px; font-size: 22px; }
.program-item p { margin: 0; color: #666; font-size: 14px; }
.session-label { color: var(--blue); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
strong { font-weight: 700; }

@media (max-width: 860px) {
  .header-inner { position: relative; min-height: 66px; }
  .site-nav { display: none; position: absolute; top: 66px; left: 0; right: 0; z-index: 5; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 24px 15px; background: #fff; border-bottom: 1px solid var(--line); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 0; border-bottom: 1px solid #eee; }
  .menu-toggle { display: block; }
  .content-grid { gap: 45px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .container, .header-inner { width: calc(100% - 32px); }
  .site-title { font-size: 16px; white-space: normal; }
  .banner-inner { padding: 62px 0 58px; }
  .intro-banner h1 { font-size: 38px; }
  .subtitle { font-size: 16px; }
  .content-grid { grid-template-columns: 1fr; gap: 45px; padding-top: 48px; padding-bottom: 56px; }
  .side-column { border-top: 1px solid var(--line); border-left: 0; padding: 27px 0 0; }
  .topic-grid { grid-template-columns: 1fr; }
  .grey-section { padding: 48px 0 55px; }
  .page-heading .container { padding: 45px 0; }
  .page-heading h1 { font-size: 38px; }
  .topic-list { columns: 1; }
  .program-item { grid-template-columns: 65px 1fr; gap: 16px; }
  .program-item h2 { font-size: 19px; }
  .footer-inner { flex-direction: column; gap: 4px; }
}