/* ==========================================================================
   VietCouncil.org — shared stylesheet
   ========================================================================== */

:root {
  --gold: #d4a017;
  --gold-dark: #b8860b;
  --red: #b91c1c;
  --red-dark: #7f1d1d;
  --navy: #0f2540;
  --navy-light: #1b3a5c;
  --ink: #1a2332;
  --muted: #5b6675;
  --paper: #ffffff;
  --cream: #faf7f0;
  --line: #e6e0d4;
  --shadow: 0 1px 3px rgba(15, 37, 64, .08), 0 8px 24px rgba(15, 37, 64, .06);
  --radius: 14px;
  --wrap: 1120px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --serif: "Georgia", "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

/* Language visibility handled by JS (data-en/data-vi). */
[hidden] { display: none !important; }

a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

h1, h2, h3, h4 { line-height: 1.2; color: var(--navy); font-weight: 750; }
h1 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -.5px; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-top: 0; }
h3 { font-size: 1.25rem; }

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

/* ---------- Top bar / header ---------- */
.topbar {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 3px solid var(--gold);
}
.topbar .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: .3px;
}
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 38px; height: 38px; flex: none;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, var(--gold) 0 62%, var(--red) 63% 100%);
  display: grid; place-items: center;
  color: var(--navy); font-weight: 900; font-size: 1rem;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.25);
}
.brand small { display: block; font-weight: 500; font-size: .7rem; color: var(--gold); letter-spacing: 1.5px; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  color: #dbe4ef; padding: 9px 12px; border-radius: 8px; font-size: .93rem; font-weight: 600;
}
.nav a:hover { background: rgba(255,255,255,.08); color: #fff; text-decoration: none; }
.nav a.active { color: #fff; background: rgba(212,160,23,.22); }

.langtoggle { display: flex; gap: 2px; margin-left: 10px; background: rgba(255,255,255,.10); border-radius: 999px; padding: 3px; }
.lang-btn {
  border: 0; background: transparent; color: #cdd8e6; cursor: pointer;
  font-weight: 700; font-size: .8rem; padding: 5px 11px; border-radius: 999px; font-family: inherit;
}
.lang-btn.active { background: var(--gold); color: var(--navy); }

.menu-btn { display: none; margin-left: auto; background: transparent; border: 1px solid rgba(255,255,255,.3); color: #fff; border-radius: 8px; padding: 8px 12px; font-size: 1.1rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 55%, var(--red-dark) 130%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(212,160,23,.28), transparent 45%);
  pointer-events: none;
}
.hero .wrap { padding-top: 84px; padding-bottom: 84px; position: relative; z-index: 1; max-width: 900px; }
.hero .kicker { color: var(--gold); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; font-size: .8rem; margin-bottom: 14px; }
.hero h1 { color: #fff; margin: 0 0 18px; }
.hero p { font-size: 1.2rem; color: #dce6f2; max-width: 660px; margin: 0 0 28px; }

.btnrow { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-block; font-weight: 700; padding: 13px 24px; border-radius: 10px;
  cursor: pointer; border: 2px solid transparent; font-size: 1rem; font-family: inherit;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-gold:hover { background: var(--gold-dark); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: var(--red-dark); }

/* ---------- Page header (interior pages) ---------- */
.pagehead { background: var(--cream); border-bottom: 1px solid var(--line); }
.pagehead .wrap { padding: 54px 24px 48px; }
.pagehead .kicker { color: var(--red); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; font-size: .78rem; margin-bottom: 10px; }
.pagehead h1 { margin: 0 0 12px; }
.pagehead p { font-size: 1.12rem; color: var(--muted); max-width: 720px; margin: 0; }

/* ---------- Sections ---------- */
section { padding: 62px 0; }
section.alt { background: var(--cream); }
.section-lead { max-width: 740px; margin: 0 0 40px; }
.section-lead .kicker { color: var(--red); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; font-size: .78rem; margin-bottom: 10px; }
.center { text-align: center; margin-left: auto; margin-right: auto; }

.prose { max-width: 760px; }
.prose p { margin: 0 0 18px; }
.prose h2 { margin: 40px 0 14px; }
.prose h3 { margin: 30px 0 10px; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 22px; }
.prose li { margin: 8px 0; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 22px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); }
.card .icon {
  width: 46px; height: 46px; border-radius: 11px; display: grid; place-items: center;
  font-size: 1.4rem; margin-bottom: 16px; background: rgba(212,160,23,.16); color: var(--gold-dark);
}
.card.red .icon { background: rgba(185,28,28,.12); color: var(--red); }
.card.navy .icon { background: rgba(15,37,64,.10); color: var(--navy); }

.badge { display: inline-block; font-size: .72rem; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; background: rgba(212,160,23,.18); color: var(--gold-dark); }

/* ---------- Branch (governance) columns ---------- */
.branches { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.branch { border-radius: var(--radius); padding: 30px; border: 1px solid var(--line); background: var(--paper); box-shadow: var(--shadow); }
.branch h3 { color: var(--navy); display: flex; align-items: center; gap: 10px; }
.branch .tag { font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; }
.branch.leg { border-top: 5px solid var(--gold); }
.branch.exe { border-top: 5px solid var(--red); }
.branch ul { padding-left: 20px; margin: 14px 0 0; }
.branch li { margin: 9px 0; color: var(--ink); }

.checks { background: var(--navy); color: #eaf1f8; border-radius: var(--radius); padding: 34px; }
.checks h3 { color: #fff; }
.checks ul { padding-left: 20px; }
.checks li { margin: 10px 0; }

/* ---------- Steps / timeline ---------- */
.steps { counter-reset: step; display: grid; gap: 18px; }
.step {
  display: grid; grid-template-columns: 54px 1fr; gap: 18px; align-items: start;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; box-shadow: var(--shadow);
}
.step .num {
  counter-increment: step; width: 46px; height: 46px; border-radius: 50%;
  background: var(--navy); color: var(--gold); font-weight: 800; font-size: 1.15rem;
  display: grid; place-items: center;
}
.step .num::before { content: counter(step); }
.step h3 { margin: 2px 0 6px; }
.step p { margin: 0; color: var(--muted); }

.timeline { position: relative; margin-left: 8px; padding-left: 28px; border-left: 3px solid var(--line); }
.tl { position: relative; padding: 6px 0 26px; }
.tl::before { content: ""; position: absolute; left: -37px; top: 10px; width: 15px; height: 15px; border-radius: 50%; background: var(--gold); border: 3px solid var(--paper); box-shadow: 0 0 0 2px var(--gold); }
.tl .phase { font-size: .74rem; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; color: var(--red); }
.tl h3 { margin: 4px 0 6px; }
.tl p { margin: 0; color: var(--muted); }

/* ---------- Principles / stats ---------- */
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pillar { text-align: center; padding: 22px 14px; }
.pillar .big { font-size: 2rem; }
.pillar h4 { margin: 12px 0 6px; color: var(--navy); }
.pillar p { margin: 0; color: var(--muted); font-size: .95rem; }

/* ---------- FAQ ---------- */
.faq { max-width: 820px; }
details.qa { border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; margin-bottom: 12px; background: var(--paper); }
details.qa summary { cursor: pointer; font-weight: 700; color: var(--navy); padding: 16px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::after { content: "+"; color: var(--gold-dark); font-weight: 800; font-size: 1.4rem; line-height: 1; }
details.qa[open] summary::after { content: "\2013"; }
details.qa .a { padding: 0 0 18px; color: var(--muted); }

/* ---------- Callout / CTA band ---------- */
.band { background: linear-gradient(135deg, var(--red-dark), var(--red)); color: #fff; text-align: center; }
.band h2 { color: #fff; }
.band p { color: #ffe9e9; max-width: 620px; margin: 0 auto 26px; }

.note { background: rgba(212,160,23,.10); border-left: 4px solid var(--gold); padding: 16px 20px; border-radius: 0 10px 10px 0; margin: 22px 0; color: var(--ink); }

/* ---------- Simple table ---------- */
.table { width: 100%; border-collapse: collapse; font-size: .96rem; }
.table th, .table td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { background: var(--cream); color: var(--navy); font-weight: 700; }

/* ---------- Footer ---------- */
footer.site { background: var(--navy); color: #c6d3e2; padding: 54px 0 30px; }
footer.site .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 34px; }
footer.site h4 { color: #fff; font-size: .95rem; margin: 0 0 14px; letter-spacing: .5px; }
footer.site a { color: #c6d3e2; display: block; padding: 5px 0; font-size: .93rem; }
footer.site a:hover { color: var(--gold); text-decoration: none; }
footer.site .fbrand { display: flex; align-items: center; gap: 12px; color: #fff; font-weight: 800; margin-bottom: 12px; }
footer.site p { font-size: .9rem; color: #93a6bd; }
footer.site .bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 34px; padding-top: 20px; font-size: .85rem; color: #8397af; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- Charter page ---------- */
.download-box { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; background: var(--cream); border: 1px solid var(--line); border-left: 5px solid var(--gold); border-radius: var(--radius); padding: 22px 24px; }
.download-box .dl-text { flex: 1 1 260px; }
.download-box .dl-text strong { color: var(--navy); display: block; margin-bottom: 3px; }
.download-box .dl-text span { color: var(--muted); font-size: .95rem; }
.charter-body { max-width: 820px; }
.charter-body h2 { margin: 38px 0 8px; font-size: 1.35rem; scroll-margin-top: 84px; }
.charter-body h2:first-of-type { margin-top: 8px; }
.charter-body .preamble { font-size: 1.05rem; color: var(--ink); }
.clause { margin: 12px 0; }
.clause .n { color: var(--gold-dark); font-weight: 800; margin-right: 8px; }
.clause.subpoint { margin: 8px 0 8px 26px; }
.clause.subpoint .n { color: var(--navy); }
.charter-note { background: rgba(212,160,23,.10); border-left: 4px solid var(--gold); padding: 16px 20px; border-radius: 0 10px 10px 0; margin: 30px 0 0; color: var(--ink); font-size: .95rem; }
.charter-index { columns: 2; column-gap: 32px; margin: 6px 0 0; padding: 0; list-style: none; }
.charter-index li { break-inside: avoid; margin: 4px 0; }
.charter-index a { font-weight: 600; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .charter-index { columns: 1; }
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--navy); flex-direction: column; align-items: stretch; padding: 10px 16px 18px; border-bottom: 3px solid var(--gold); }
  .nav.open { display: flex; }
  .nav a { padding: 12px 10px; }
  .menu-btn { display: inline-block; }
  .langtoggle { margin-left: auto; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4, .branches, .pillars, footer.site .cols { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .pillars { grid-template-columns: 1fr; }
  .hero .wrap { padding-top: 60px; padding-bottom: 60px; }
}