/* =========================================================
   ESEDEP — design tokens
   Navy palette taken from the university's own live site
   (chmnu.edu.ua/wp-content/themes/chdutheme1/css/modern-theme.css);
   accent blue taken from the official ESEDEP project logo;
   gold taken from the EU emblem used in the project's official
   presentation (mandatory EU visual-identity colour).
   ========================================================= */
:root {
  --navy-deep:   #0a1e3c;
  --navy:        #012d7d;
  --blue:        #0b3e9c;
  --blue-mid:    #1a66e1;
  --accent:      #009fdb;   /* ESEDEP logo blue */
  --accent-dark: #0077a8;
  --gold:        #ffcc00;   /* EU emblem gold */

  --white:       #ffffff;
  --white-soft:  #f7fafc;
  --gray-100:    #eef2f7;
  --gray-200:    #dde4ec;
  --gray-400:    #94a3b8;
  --gray-600:    #4b5768;
  --gray-800:    #1e293b;
  --ink:         #0f172a;

  --shadow-sm: 0 2px 10px rgba(10, 30, 60, 0.06);
  --shadow-md: 0 10px 30px rgba(10, 30, 60, 0.10);
  --shadow-lg: 0 24px 60px rgba(10, 30, 60, 0.16);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --wrap: 1180px;
}

/* =========================================================
   Reset
   ========================================================= */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 800; color: var(--ink); letter-spacing: -0.01em; }
p { margin: 0; }
button { font-family: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--navy); color: #fff;
  padding: 10px 16px; z-index: 999; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

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

/* =========================================================
   Header
   ========================================================= */
.eu-bar { background: var(--navy-deep); color: #cfe0ff; font-size: 13px; }
.eu-bar__inner { display: flex; align-items: center; gap: 10px; padding: 6px 24px; }
.eu-bar__emblem { height: 16px; width: auto; }
.eu-bar__text { opacity: .9; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.98);
  border-bottom: 1px solid var(--gray-200);
}
@media (min-width: 901px) {
  .site-header { backdrop-filter: saturate(180%) blur(10px); }
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 42px; height: 42px; border-radius: 9px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__text strong { font-size: 18px; letter-spacing: 0.02em; color: var(--navy); }
.brand__text small { font-size: 11px; color: var(--gray-600); max-width: 230px; }

.primary-nav { display: flex; align-items: center; gap: 28px; }
.primary-nav ul { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.primary-nav a {
  font-size: 14.5px; font-weight: 600; color: var(--gray-800);
  padding: 8px 2px; position: relative;
}
.primary-nav ul li a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--accent); transform: scaleX(0); transition: transform .2s ease;
}
.primary-nav ul li a:hover::after { transform: scaleX(1); }

.lang-switch {
  border: 1.5px solid var(--navy); border-radius: 999px;
  padding: 6px 14px; font-size: 13px; font-weight: 700; color: var(--navy);
  transition: background .15s ease, color .15s ease;
}
.lang-switch:hover { background: var(--navy); color: #fff; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; border: none; background: transparent; cursor: pointer;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--navy); }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: 14.5px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { border: 1.5px solid var(--gray-200); color: var(--navy); background: #fff; }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-dark); transform: translateY(-2px); }

/* =========================================================
   Hero (home)
   ========================================================= */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--navy-deep) 0%, var(--navy) 55%, var(--blue) 100%);
  color: #fff;
  padding: 96px 0 120px;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 85% 10%, rgba(0,159,219,0.35), transparent 70%);
  pointer-events: none;
}
.hero__inner { position: relative; max-width: 760px; }
.kicker {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 12.5px; font-weight: 700;
  color: var(--gold); margin: 0 0 16px;
}
.hero h1 { font-size: clamp(32px, 4.4vw, 52px); line-height: 1.12; color: #fff; margin-bottom: 22px; }
.hero__lead { font-size: 17px; color: rgba(255,255,255,0.86); max-width: 620px; margin-bottom: 34px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .btn--ghost { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.35); color: #fff; }
.hero .btn--ghost:hover { background: rgba(255,255,255,0.16); border-color: #fff; color: #fff; }
.hero__badge {
  position: absolute; right: 40px; top: 50%; transform: translateY(-50%);
  width: 190px; height: 190px; border-radius: 28px; overflow: hidden;
  box-shadow: var(--shadow-lg); display: none;
}
.hero__badge img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 1000px) { .hero__badge { display: block; } }

/* =========================================================
   Partners strip / facts strip
   ========================================================= */
.partners-strip { background: var(--white-soft); border-bottom: 1px solid var(--gray-200); }
.partners-strip__inner {
  display: flex; align-items: center; justify-content: center; gap: 56px;
  padding: 26px 24px; flex-wrap: wrap;
}
.partners-strip__inner img { height: 46px; width: auto; filter: grayscale(15%); }
.partners-strip__inner img[alt="PMBSNU"] { height: 56px; }

.facts-strip { background: var(--navy); color: #fff; }
.facts-strip__inner {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px; padding: 34px 24px;
}
.fact { text-align: center; border-left: 1px solid rgba(255,255,255,0.15); padding-left: 20px; }
.fact:first-child { border-left: none; padding-left: 0; }
.fact__value { display: block; font-size: 21px; font-weight: 800; margin-bottom: 4px; }
.fact__label { display: block; font-size: 12.5px; color: rgba(255,255,255,0.7); }

/* =========================================================
   Sections
   ========================================================= */
.section { padding: 76px 0; }
.section--muted { background: var(--white-soft); }
.section--cta { padding-bottom: 96px; }
.section h2 {
  font-size: clamp(24px, 2.6vw, 32px); margin-bottom: 28px;
}
.section-note { color: var(--gray-600); margin-bottom: 18px; font-size: 15px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.split__col h2 { margin-bottom: 22px; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 44px; } }

.check-list li, .num-list li {
  position: relative; padding: 12px 0 12px 32px; border-top: 1px solid var(--gray-200);
  font-size: 15px; color: var(--gray-800);
}
.check-list li:first-child, .num-list li:first-child { border-top: none; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 19px; width: 9px; height: 9px;
  border-radius: 50%; background: var(--accent);
}
.check-list--accent li::before { background: var(--gold); }
.num-list { counter-reset: n; }
.num-list li::before {
  counter-increment: n; content: counter(n);
  position: absolute; left: 0; top: 10px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--navy); color: #fff; font-size: 11.5px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.cards { display: grid; gap: 22px; }
.cards--2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 720px) { .cards--2 { grid-template-columns: 1fr; } }
.card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-sm);
}
.card__num {
  display: inline-block; font-size: 13px; font-weight: 800; color: var(--accent);
  background: rgba(0,159,219,0.1); padding: 4px 10px; border-radius: 999px; margin-bottom: 14px;
}
.card__eyebrow {
  display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--navy); background: var(--gray-100);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--gray-600); font-size: 15px; }

.pill-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.pill {
  background: var(--white-soft); border: 1px solid var(--gray-200); border-radius: 999px;
  padding: 12px 20px; font-size: 14.5px; font-weight: 600; color: var(--navy);
}

.cta-box {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  background: linear-gradient(120deg, var(--navy) 0%, var(--blue) 100%);
  color: #fff; border-radius: var(--radius-lg); padding: 40px 44px; flex-wrap: wrap;
}
.cta-box h2 { color: #fff; margin-bottom: 8px; }
.cta-box p { color: rgba(255,255,255,0.85); font-size: 15px; }
.cta-box a.mailto, .cta-box a { color: #fff; text-decoration: underline; }

/* =========================================================
   Page hero (inner pages)
   ========================================================= */
.page-hero {
  padding: 64px 0 44px;
  background: linear-gradient(180deg, var(--white-soft), #fff);
  border-bottom: 1px solid var(--gray-200);
}
.page-hero h1 { font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 16px; max-width: 780px; }
.page-hero__lead { font-size: 16.5px; color: var(--gray-600); max-width: 700px; margin-bottom: 22px; }

/* =========================================================
   Steps (About > participate)
   ========================================================= */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  padding: 26px 20px; text-align: center;
}
.step__num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%; background: var(--accent); color: #fff;
  font-weight: 800; margin-bottom: 14px;
}
.step p { font-size: 14.5px; color: var(--gray-800); }

/* =========================================================
   People (Team page)
   ========================================================= */
.people { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
@media (max-width: 720px) { .people { grid-template-columns: 1fr; } }
.person {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow-sm);
}
.person__photo {
  width: 92px; height: 92px; border-radius: 50%; object-fit: cover; margin-bottom: 16px;
  border: 3px solid var(--white-soft); box-shadow: var(--shadow-sm);
}
.person__role {
  display: inline-block; font-size: 12px; font-weight: 800; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--accent-dark); margin-bottom: 6px;
}
.person h3 { font-size: 19px; margin-bottom: 8px; }
.person p { color: var(--gray-600); font-size: 14.5px; }

.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  background: var(--gray-100); color: var(--gray-800); border-radius: 999px;
  padding: 9px 16px; font-size: 13.5px; font-weight: 600;
}

/* =========================================================
   Events
   ========================================================= */
.events-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 980px) { .events-list { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .events-list { grid-template-columns: 1fr; } }
.event-card {
  display: flex; flex-direction: column; background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease;
}
.event-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.event-card__media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--gray-100); }
.event-card__media img { width: 100%; height: 100%; object-fit: cover; }
.event-card__body { padding: 20px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.event-card--no-photo .event-card__body { padding-top: 24px; }
.event-card h3 { font-size: 15.5px; line-height: 1.4; }
.event-card__link { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--accent-dark); }

/* =========================================================
   Course tabs
   ========================================================= */
.year-tabs__nav { display: flex; gap: 10px; margin-bottom: 28px; flex-wrap: wrap; }
.year-tabs__btn {
  border: 1.5px solid var(--gray-200); background: #fff; border-radius: 999px;
  padding: 10px 22px; font-weight: 700; font-size: 14.5px; color: var(--gray-600); cursor: pointer;
}
.year-tabs__btn.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.year-panel { display: none; }
.year-panel.is-active { display: block; }
.topic-list { counter-reset: t; display: grid; gap: 10px; }
.topic-list li {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
  padding: 14px 18px; font-size: 14.5px;
}

/* =========================================================
   Documents (Materials / Feedback)
   ========================================================= */
.doc-list { display: grid; gap: 12px; }
.doc-list a {
  display: flex; align-items: center; gap: 14px; background: #fff;
  border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 16px 20px;
  transition: border-color .15s ease, transform .15s ease;
}
.doc-list a:hover { border-color: var(--accent); transform: translateX(4px); }
.doc-list__icon {
  flex: none; width: 42px; height: 30px; border-radius: 6px; background: var(--navy); color: #fff;
  font-size: 11px; font-weight: 800; display: flex; align-items: center; justify-content: center;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--navy-deep); color: rgba(255,255,255,0.82); }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  padding: 64px 24px 40px;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-logo { width: 52px; height: 52px; border-radius: 12px; margin-bottom: 14px; }
.footer-col--brand p { font-size: 14px; margin-bottom: 18px; max-width: 220px; }
.footer-partners { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-partners img {
  height: 30px; width: auto; background: #fff; border-radius: 6px;
  padding: 6px 8px; box-sizing: content-box;
}
.footer-seal { height: 40px !important; padding: 4px !important; }
.footer-col h3 { color: #fff; font-size: 14px; margin-bottom: 18px; text-transform: uppercase; letter-spacing: 0.04em; }
.footer-col ul li { margin-bottom: 10px; font-size: 14.5px; }
.footer-col a:hover { color: #fff; text-decoration: underline; }

.eu-disclaimer { border-top: 1px solid rgba(255,255,255,0.12); padding: 24px 0; }
.eu-disclaimer .wrap { display: flex; align-items: flex-start; gap: 18px; }
.eu-disclaimer img { height: 34px; width: auto; flex: none; margin-top: 2px; }
.eu-disclaimer p { font-size: 12.5px; color: rgba(255,255,255,0.6); max-width: 900px; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding: 18px 0; font-size: 13px; color: rgba(255,255,255,0.55); }

/* =========================================================
   Responsive nav
   ========================================================= */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    position: fixed; inset: 0 0 0 auto; width: min(320px, 86%); height: 100vh;
    background: #fff; flex-direction: column; align-items: flex-start;
    padding: 100px 28px 28px; gap: 28px; box-shadow: var(--shadow-lg);
    transform: translateX(100%); transition: transform .25s ease; z-index: 90;
  }
  .primary-nav.is-open { transform: translateX(0); }
  .primary-nav ul { flex-direction: column; align-items: flex-start; gap: 18px; }
  .primary-nav ul li a { font-size: 17px; }
}