/* ════════════════════════════════════════════════════════════
   cosap-website shared topbar + region/language picker
   Extracted from the 7 marketing pages so the nav lives in a
   single place. Consumes the CSS vars defined in each page's
   :root (--acc, --acc-bg, --bd, --t1, --t2, --t3, --card, etc.)
   ════════════════════════════════════════════════════════════ */

/* ── Navbar shell ── */
.navbar{
  background:rgba(255,255,255,0.85);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--bd);
  position:fixed;top:0;left:0;right:0;z-index:500;
  height:56px;
}
.nav-inner{
  max-width:1280px;margin:0 auto;padding:0 40px;
  height:56px;display:flex;align-items:center;
}
.nav-logo{
  font-family:var(--font-heading);font-weight:700;font-size:18px;
  color:var(--t1);letter-spacing:-0.02em;
}
.nav-logo span{color:var(--acc);font-weight:400;margin-left:1px}
.nav-center{display:flex;align-items:center;gap:4px;margin-left:48px}
.nav-link{
  font-size:13px;font-weight:500;color:var(--t2);
  padding:8px 14px;border-radius:6px;transition:all 0.15s;
}
.nav-link:hover{color:var(--t1);background:var(--acc-bg)}
.nav-link.active{color:var(--acc);background:var(--acc-bg)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-login{
  font-size:13px;font-weight:500;color:#fff;background:var(--acc);
  padding:7px 18px;border-radius:6px;transition:background 0.2s;
}
.nav-login:hover{background:var(--acc-dark)}

/* ══════════════════════════════════════════════════════════════
   Region & Language Picker — trigger button
   Mirrors the mockup .rl-btn (drop-in replacement for .lang-btn)
   ══════════════════════════════════════════════════════════════ */
.rl-picker{position:relative;display:flex;align-items:center}

.rl-trigger{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 10px 7px 12px;
  font-size:13px;font-weight:500;color:var(--t2);
  border-radius:6px;
  transition:all 0.15s;cursor:pointer;line-height:1;
  background:none;border:none;font-family:inherit;
}
.rl-trigger:hover{color:var(--t1);background:var(--acc-bg)}
.rl-picker.open .rl-trigger{color:var(--acc);background:var(--acc-bg)}

.rl-trigger-region{
  display:inline-flex;align-items:center;
  font-family:var(--font-heading);font-weight:600;
  font-size:12px;letter-spacing:0.04em;
  color:var(--t1);
  background:var(--card);
  border:1px solid var(--bd);border-radius:4px;
  padding:2px 5px;line-height:1;
  min-width:28px;justify-content:center;
}
.rl-picker.open .rl-trigger-region,
.rl-trigger:hover .rl-trigger-region{
  border-color:var(--acc-border, #90B4E0);color:var(--acc);
}
.rl-trigger-sep{color:var(--t4);font-weight:400;opacity:0.7}
.rl-trigger-lang{font-weight:500}
.rl-trigger svg.rl-caret{
  width:10px;height:10px;color:var(--t3);transition:transform 0.2s;
}
.rl-picker.open .rl-trigger svg.rl-caret{
  transform:rotate(180deg);color:var(--acc);
}

/* ══════════════════════════════════════════════════════════════
   Popover shell (narrow stacked variant)
   ══════════════════════════════════════════════════════════════ */
.rl-pop{
  position:absolute;top:calc(100% + 8px);right:0;
  width:340px;
  background:var(--card);
  border:1px solid var(--bd);border-radius:12px;
  box-shadow:var(--shadow-md, 0 4px 12px rgba(26,45,69,0.10));
  opacity:0;visibility:hidden;
  transform:translateY(-6px);
  transition:opacity 0.2s ease,transform 0.2s ease,visibility 0.2s;
  z-index:700;overflow:hidden;
}
.rl-picker.open .rl-pop{
  opacity:1;visibility:visible;transform:translateY(0);overflow:visible;
}

.rl-pop-head{
  padding:14px 20px 10px;
  border-bottom:1px solid var(--bd);
  background:linear-gradient(180deg,#F6F8FB 0%,var(--card) 100%);
}
.rl-pop-title{
  font-family:var(--font-heading);font-size:14px;font-weight:700;
  color:var(--t1);letter-spacing:-0.01em;
}
.rl-pop-sub{
  font-size:12px;color:var(--t3);margin-top:2px;line-height:1.5;
}

/* ── Stacked body (Alternative Layout) ── */
.rl-stack-body{
  padding:16px 20px 18px;
  display:flex;flex-direction:column;gap:14px;
}
.rl-stack-field{display:flex;flex-direction:column;gap:6px}
.rl-stack-label{
  font-size:10px;font-weight:600;letter-spacing:0.08em;
  text-transform:uppercase;color:var(--t3);
}

.rl-stack-select{position:relative}
.rl-stack-trigger{
  display:flex;align-items:center;gap:10px;
  width:100%;padding:9px 12px;
  background:var(--card);
  border:1px solid var(--bd);border-radius:6px;
  font-family:inherit;font-size:13px;color:var(--t1);
  cursor:pointer;text-align:left;line-height:1.25;
  transition:border-color 0.15s,background 0.15s,box-shadow 0.15s;
}
.rl-stack-trigger:hover{border-color:var(--bdm);background:#FAFBFD}
.rl-stack-select.open .rl-stack-trigger{
  border-color:var(--acc-border, #90B4E0);background:var(--card);
  box-shadow:0 0 0 3px var(--acc-bg);
}

.rl-stack-trigger .rl-code{flex-shrink:0}
.rl-stack-trigger-body{
  flex:1;min-width:0;display:flex;flex-direction:column;gap:1px;
}
.rl-stack-trigger-primary{
  font-size:13px;font-weight:600;color:var(--t1);line-height:1.25;
}
.rl-stack-trigger-secondary{
  font-size:11px;font-weight:500;color:var(--t3);line-height:1.3;
}
.rl-stack-caret{
  width:10px;height:10px;color:var(--t3);flex-shrink:0;
  transition:transform 0.2s,color 0.15s;
}
.rl-stack-select.open .rl-stack-caret{
  transform:rotate(180deg);color:var(--acc);
}

/* ── Nested menu ── */
.rl-stack-menu{
  position:absolute;top:calc(100% + 4px);left:0;right:0;
  background:var(--card);
  border:1px solid var(--bd);border-radius:8px;
  box-shadow:var(--shadow-md, 0 4px 12px rgba(26,45,69,0.10));
  padding:4px;z-index:10;
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity 0.15s,transform 0.15s,visibility 0.15s;
  max-height:220px;overflow:auto;
}
.rl-stack-select.open .rl-stack-menu{
  opacity:1;visibility:visible;transform:translateY(0);
}

.rl-stack-opt{
  display:flex;align-items:center;gap:10px;
  width:100%;padding:8px 10px;
  background:transparent;border:none;border-radius:6px;
  font-family:inherit;font-size:13px;color:var(--t1);
  text-align:left;cursor:pointer;
  transition:background 0.12s;
}
.rl-stack-opt:hover{background:var(--acc-bg)}
.rl-stack-opt.active{background:var(--acc-bg)}
.rl-stack-opt.active .rl-stack-opt-primary{color:var(--acc)}
.rl-stack-opt.active .rl-code{
  color:var(--acc);background:var(--acc-bg);
  border-color:var(--acc-border, #90B4E0);
}
.rl-stack-opt-body{
  flex:1;min-width:0;display:flex;flex-direction:column;gap:1px;
}
.rl-stack-opt-primary{
  font-size:13px;font-weight:600;color:var(--t1);line-height:1.25;
}
.rl-stack-opt-secondary{
  font-size:11px;color:var(--t3);line-height:1.3;font-weight:500;
}
.rl-stack-opt .rl-check{margin-left:auto}

/* ── Region code chip (KR / TW / SG) ── */
.rl-code{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-heading);font-weight:700;
  font-size:11px;letter-spacing:0.04em;
  color:var(--t2);
  background:var(--bg);border:1px solid var(--bd);
  border-radius:4px;
  width:34px;height:24px;flex-shrink:0;
}
.rl-check{
  width:16px;height:16px;color:var(--acc);flex-shrink:0;
}

/* ── Footer ── */
.rl-pop-foot{
  display:flex;align-items:center;justify-content:space-between;
  gap:8px;padding:12px 20px;
  background:var(--bg);border-top:1px solid var(--bd);
}
.rl-pop-foot-note{
  font-size:11px;color:var(--t3);line-height:1.4;
  flex:1;min-width:0;
}
.rl-pop-foot-actions{display:flex;gap:8px;flex-shrink:0}
.rl-btn-cancel,.rl-btn-apply{
  padding:7px 16px;border-radius:6px;
  font-size:13px;font-weight:500;cursor:pointer;
  transition:all 0.15s;font-family:inherit;line-height:1.25;
}
.rl-btn-cancel{
  background:var(--card);color:var(--t2);border:1px solid var(--bd);
}
.rl-btn-cancel:hover{
  background:var(--bg);color:var(--t1);border-color:var(--bdm);
}
.rl-btn-apply{
  background:var(--acc);color:#fff;border:1px solid var(--acc);
}
.rl-btn-apply:hover{
  background:var(--acc-dark);border-color:var(--acc-dark);
}

/* ── Responsive ── */
@media(max-width:900px){
  .nav-inner{padding:0 20px}
  .nav-center{display:none}
  .rl-pop{width:300px;right:-12px}
}