/* ============================================================
   ONDM 2027 — Global Styles
   Colors derived from official ONDM 2027 Barcelona logo
   ============================================================ */

:root {
  /* Brand colors from logo */
  --color-primary:     #0d2472;   /* deep navy */
  --color-dark:        #091952;   /* darkest navy – nav/footer bg */
  --color-accent:      #f77f00;   /* orange – CTAs, highlights */
  --color-blue-mid:    #1e6fd9;   /* bright blue */
  --color-blue-light:  #4cc9f0;   /* cyan – subtle accents */
  --color-white:       #ffffff;
  --color-bg:          #f4f7fc;   /* page background */
  --color-bg-card:     #ffffff;
  --color-text:        #1a1a2e;
  --color-text-muted:  #5a6275;
  --color-border:      #dce3f0;
  --color-tbd-bg:      #fff3cd;
  --color-tbd-text:    #856404;

  /* Typography */
  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Courier New', monospace;

  /* Spacing */
  --gap:      1.5rem;
  --gap-lg:   3rem;
  --radius:   8px;
  --radius-lg: 16px;

  /* Nav */
  --nav-height: 90px;
}

/* ---- Reset / Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-blue-mid); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--color-accent); }
ul { list-style: none; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5 { font-weight: 700; line-height: 1.25; color: var(--color-primary); }
h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ---- Layout helpers ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section { padding: 4rem 0; }
.section--alt { background: #eef2f9; }

.page-split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem;
  align-items: start;
}
.page-main-aside {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 2.5rem;
  align-items: start;
}

.section__title { text-align: center; margin-bottom: 2.5rem; }
.section__title h2 { position: relative; display: inline-block; padding-bottom: .6rem; }
.section__title h2::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 60px; height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section__subtitle { color: var(--color-text-muted); margin-top: .5rem; font-size: 1rem; }

/* ---- Navigation ---- */
.site-nav {
  position: sticky; top: 0; z-index: 1000;
  background: var(--color-dark);
  box-shadow: 0 2px 12px rgba(0,0,0,.35);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--nav-height);
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.nav-logo {
  display: flex; align-items: center; gap: .75rem;
  text-decoration: none; flex-shrink: 0;
}
.nav-logo img { height: 76px; width: auto; }
.nav-logo-text { color: var(--color-white); font-weight: 700; font-size: 1.35rem; line-height: 1.2; }
.nav-logo-text span { display: block; font-size: .88rem; font-weight: 400; color: var(--color-blue-light); opacity: .9; }
.nav-logo-text span.nav-dates { font-size: .82rem; color: var(--color-accent); opacity: 1; font-weight: 600; letter-spacing: .02em; }

.nav-links { display: flex; align-items: center; gap: .1rem; margin-left: 2.5rem; }
.nav-item { position: relative; }
.nav-item > a {
  color: rgba(255,255,255,.9); padding: .5rem .75rem;
  font-size: .875rem; font-weight: 500;
  border-radius: var(--radius);
  transition: background .2s, color .2s;
  display: flex; align-items: center; gap: .3rem;
  white-space: nowrap; text-decoration: none;
}
.nav-item > a:hover, .nav-item.active > a {
  background: rgba(255,255,255,.1); color: var(--color-accent);
  text-decoration: none;
}
.nav-item > a .arrow {
  font-size: .6rem; opacity: .7;
  transition: transform .2s; display: inline-block;
}
.nav-item:hover > a .arrow { transform: rotate(180deg); }

/* Dropdown */
.dropdown {
  position: absolute; top: calc(100% + 6px); left: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(0,0,0,.15);
  min-width: 230px;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity .2s, transform .2s, visibility .2s;
  z-index: 200;
}
.nav-item:hover .dropdown, .nav-item:focus-within .dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.dropdown a {
  display: block; padding: .65rem 1.1rem;
  color: var(--color-text); font-size: .875rem;
  border-bottom: 1px solid var(--color-border);
  transition: background .15s, color .15s;
}
.dropdown a:last-child { border-bottom: none; }
.dropdown a:hover {
  background: var(--color-bg); color: var(--color-accent);
  text-decoration: none;
}

/* CTA button in nav */
.btn-nav-cta {
  background: var(--color-accent) !important;
  color: var(--color-white) !important;
  border-radius: var(--radius) !important;
  padding: .45rem 1rem !important;
  font-weight: 700 !important;
  transition: background .2s, transform .1s !important;
  margin-left: .5rem;
}
.btn-nav-cta:hover {
  background: var(--color-white) !important;
  color: var(--color-accent) !important;
  transform: translateY(-1px);
  text-decoration: none !important;
}
.nav-linkedin {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border-radius: var(--radius);
  background: #0a66c2;
  color: var(--color-white) !important;
  margin-left: 1.25rem;
  transition: background .2s, transform .1s;
  flex-shrink: 0;
}
.nav-linkedin:hover {
  background: #004182;
  transform: translateY(-1px);
  text-decoration: none !important;
}

/* Hamburger (mobile) */
.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: .5rem;
}
.nav-hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--color-white); border-radius: 2px;
  transition: all .3s;
}
.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ---- Footer ---- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255,255,255,.75);
  padding: 3rem 0 1.5rem;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 1.5rem;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem; margin-bottom: 2.5rem;
}
.footer-col h4 { color: var(--color-white); margin-bottom: .85rem; font-size: .95rem; letter-spacing: .03em; }
.footer-col a { color: rgba(255,255,255,.65); font-size: .875rem; display: block; margin-bottom: .45rem; }
.footer-col a:hover { color: var(--color-accent); text-decoration: none; }
.footer-col p { font-size: .875rem; color: rgba(255,255,255,.65); margin-bottom: .4rem; }
.footer-logo { height: 48px; margin-bottom: 1rem; }
.footer-social { margin-top: .85rem; }
.social-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .45rem .9rem;
  border-radius: var(--radius);
  font-size: .82rem; font-weight: 600;
  text-decoration: none;
  transition: background .2s, color .2s;
}
.social-btn--linkedin {
  background: #0a66c2;
  color: var(--color-white);
}
.social-btn--linkedin:hover {
  background: #004182;
  color: var(--color-white);
  text-decoration: none;
}
.nav-item--linkedin { margin-left: 2rem; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto; padding: 1.5rem 1.5rem 0;
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: .75rem;
  font-size: .8rem; color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--color-accent); }
.footer-bottom-links { display: flex; gap: 1.5rem; }

/* ---- Page header (inner pages) ---- */
.page-header {
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 60%, #1040a0 100%);
  color: var(--color-white);
  padding: 3.5rem 0 3rem;
  border-bottom: 4px solid var(--color-accent);
}
.page-header .container { position: relative; }
.page-header h1 { color: var(--color-white); margin-bottom: .5rem; }
.page-header .breadcrumb {
  font-size: .82rem; color: rgba(255,255,255,.55);
  margin-bottom: .85rem; display: flex; align-items: center; gap: .5rem;
}
.page-header .breadcrumb a { color: rgba(255,255,255,.65); }
.page-header .breadcrumb a:hover { color: var(--color-accent); }
.page-header .breadcrumb .sep { opacity: .4; }
.page-header p { color: rgba(255,255,255,.8); margin-top: .75rem; max-width: 720px; font-size: 1.05rem; }
.page-header .badge-status {
  display: inline-block; margin-top: .75rem;
  background: rgba(247,127,0,.2); color: var(--color-accent);
  border: 1px solid rgba(247,127,0,.4);
  padding: .25rem .75rem; border-radius: 20px; font-size: .8rem; font-weight: 600;
}

/* ---- TBD marker ---- */
.tbd {
  display: inline-block;
  background: var(--color-tbd-bg); color: var(--color-tbd-text);
  padding: .1rem .45rem; border-radius: 4px;
  font-size: .85em; font-weight: 600; letter-spacing: .02em;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .65rem 1.4rem;
  border-radius: var(--radius); font-weight: 600; font-size: .95rem;
  cursor: pointer; border: 2px solid transparent;
  transition: all .2s; text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: var(--color-accent); color: var(--color-white);
  border-color: var(--color-accent);
}
.btn-primary:hover { background: #d96b00; border-color: #d96b00; color: var(--color-white); }
.btn-outline {
  background: transparent; color: var(--color-white);
  border-color: rgba(255,255,255,.6);
}
.btn-outline:hover { background: rgba(255,255,255,.1); color: var(--color-white); border-color: var(--color-white); }
.btn-secondary {
  background: var(--color-primary); color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-secondary:hover { background: #0a1d5c; color: var(--color-white); }
.btn-sm { padding: .4rem .9rem; font-size: .85rem; }
.btn-lg { padding: .85rem 2rem; font-size: 1.05rem; }

/* ---- Alert / notice banners ---- */
.alert {
  padding: 1rem 1.25rem; border-radius: var(--radius);
  border-left: 4px solid; margin-bottom: 1.5rem;
  font-size: .92rem;
}
.alert-info { background: #e8f0fe; border-color: var(--color-blue-mid); color: #1a3a7c; }
.alert-warning { background: var(--color-tbd-bg); border-color: var(--color-accent); color: var(--color-tbd-text); }
.alert-success { background: #e8f8ee; border-color: #28a745; color: #155724; }

/* ---- Responsive ---- */
@media (max-width: 960px) {
  :root { --nav-height: 82px; }
  .nav-links { display: none; flex-direction: column; align-items: flex-start; gap: 0; }
  .nav-links.open {
    display: flex;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--color-dark);
    padding: .75rem 1rem 1rem;
    box-shadow: 0 8px 20px rgba(0,0,0,.3);
    border-top: 1px solid rgba(255,255,255,.1);
  }
  .nav-item { width: 100%; }
  .nav-item > a { padding: .65rem 1rem; width: 100%; border-radius: 4px; }
  .dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; background: rgba(255,255,255,.05);
    border-radius: 0; display: none; min-width: 0;
  }
  .nav-item.open .dropdown { display: block; }
  .dropdown a {
    color: rgba(255,255,255,.75); border-bottom-color: rgba(255,255,255,.08);
    padding-left: 2rem;
  }
  .dropdown a:hover { background: rgba(255,255,255,.05); color: var(--color-accent); }
  .nav-hamburger { display: flex; }
  .site-nav { position: relative; }
  .nav-inner { position: relative; flex-wrap: nowrap; padding: 0 1rem; }
  .nav-logo img { height: 62px; }
  .nav-logo-text { font-size: 1.12rem; }
  .nav-logo-text span { font-size: .8rem; }
  .nav-logo-text span.nav-dates { font-size: .74rem; }
  .btn-nav-cta { margin-left: 0; margin-top: .5rem; }
  .nav-item--linkedin { margin-left: 0; }

  .page-split-grid,
  .page-main-aside {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

@media (max-width: 600px) {
  :root { --nav-height: 72px; }
  .section { padding: 2.5rem 0; }
  .nav-inner { padding: 0 .75rem; }
  .nav-logo img { height: 52px; }
  .nav-logo-text { font-size: 1rem; }
  .nav-logo-text span { font-size: .76rem; }
  .nav-logo-text span:not(.nav-dates) { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .page-header { padding: 2.5rem 0 2rem; }
}

@media (max-width: 400px) {
  .footer-inner { grid-template-columns: 1fr; }
}