/* Euro banknote design proposals — shared stylesheet.
   Dark is the default theme; light theme via prefers-color-scheme. */

:root {
  --bg: #0d0f14; --panel: #151924; --line: #242c3b;
  --fg: #e8ebf0; --muted: #98a0b3; --accent: #4f8ff7;
  --gold: #d4af37; --teal: #45b8b4;
  --shadow: rgba(0, 0, 0, .45); --shadow-strong: rgba(0, 0, 0, .7);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7f9; --panel: #ffffff; --line: #dde3ec;
    --fg: #1a1d24; --muted: #5c6575; --accent: #2059b8;
    --gold: #8a6d13; --teal: #1f7a77;
    --shadow: rgba(20, 30, 50, .18); --shadow-strong: rgba(20, 30, 50, .35);
    color-scheme: light;
  }
}

* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--fg);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }

/* top bar: brand + language switcher */
.topbar {
  max-width: 1500px; margin: 0 auto; padding: 18px 24px 0;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand { font-weight: 700; font-size: 15px; color: var(--fg); text-decoration: none; }
.brand .euro { color: var(--accent); margin-right: 6px; }
.langswitch { display: flex; gap: 4px; }
.langswitch a {
  padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line);
  font-size: 13px; text-decoration: none; color: var(--muted);
}
.langswitch a.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.langswitch a:hover:not(.active) { border-color: var(--accent); color: var(--fg); }

/* hero band */
.hero-band {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 12% -10%,
      color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 13%, var(--bg)) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}
.hero-band::after {
  content: "€"; position: absolute; right: -30px; top: -60px;
  font-size: 380px; font-weight: 700; line-height: 1; pointer-events: none;
  color: color-mix(in srgb, var(--accent) 9%, transparent);
}
.hero {
  position: relative; max-width: 900px; margin: 0 auto;
  padding: 56px 24px 64px; z-index: 1; text-align: center;
}
.hero h1 { font-size: 40px; letter-spacing: -0.02em; margin-top: 20px; }
.hero p.intro {
  color: var(--muted); margin: 16px auto 0; max-width: 68ch; font-size: 16px;
}
.live-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 13px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: color-mix(in srgb, var(--gold) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--gold) 40%, transparent);
  color: var(--gold);
}
.live-pill .dot {
  flex: 0 0 8px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--gold);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) { .live-pill .dot { animation: none; } }
.stats {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px;
  justify-content: center;
}
.stat {
  padding: 5px 14px; border-radius: 999px; font-size: 13px;
  border: 1px solid var(--line); color: var(--muted);
  background: color-mix(in srgb, var(--panel) 65%, transparent);
}
.hero .actions, .cta-bottom .actions {
  margin-top: 34px; display: flex; flex-direction: column;
  align-items: center; gap: 16px;
}
.btn {
  display: inline-block; padding: 8px 16px; border-radius: 8px;
  font-size: 14px; font-weight: 600; text-decoration: none;
  border: 1px solid var(--accent);
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.ghost { color: var(--accent); }
.btn.ghost:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.btn.gold {
  background: #ffcc00; border-color: #ffcc00; color: #14213d;
  box-shadow: 0 4px 18px color-mix(in srgb, #ffcc00 30%, transparent);
}
.btn.gold:hover { background: #ffd83d; border-color: #ffd83d; }
.btn.big { padding: 13px 24px; font-size: 16px; border-radius: 11px; }
.btn .arrow { display: inline-block; margin-left: 6px; transition: transform .15s; }
.btn:hover .arrow { transform: translateX(3px); }

/* bottom survey CTA */
.cta-bottom {
  margin-top: 40px; padding: 52px 26px 56px; text-align: center;
  border: 1px solid var(--line); border-radius: 14px;
  background:
    radial-gradient(600px 300px at 50% -40%,
      color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
    var(--panel);
}
.cta-bottom h2 { font-size: 26px; letter-spacing: -0.01em; }
.cta-bottom p { color: var(--muted); margin: 14px auto 0; max-width: 62ch; }

.notice {
  max-width: 1500px; margin: 28px auto 0; padding: 0 24px;
  display: flex; justify-content: center;
}
.notice > div {
  border: 1px solid var(--line); border-left: 4px solid var(--gold);
  background: var(--panel); border-radius: 10px;
  padding: 14px 18px; font-size: 14px; color: var(--muted); max-width: 100ch;
}
.notice strong { color: var(--fg); }

/* sticky filter nav (gallery pages) */
nav.filters {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding: 10px 16px; margin-top: 18px;
}
.filters .groups {
  display: flex; flex-wrap: wrap; gap: 10px 14px;
  align-items: center; justify-content: center;
  max-width: 1500px; margin: 0 auto;
}
/* segmented control: wraps as one unit, never mid-group */
.seg {
  display: inline-flex; align-items: stretch;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--panel); overflow: hidden; flex: 0 0 auto;
  max-width: 100%;
}
.seg > * {
  border: 0; background: none; color: var(--fg);
  font: inherit; font-size: 13px; padding: 7px 13px;
  cursor: pointer; text-decoration: none;
  display: flex; align-items: center; justify-content: center;
  white-space: nowrap; transition: background .15s;
}
.seg > * + * { border-left: 1px solid var(--line); }
.seg > *:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.seg > .active { background: var(--accent); color: #fff; }
.seg > .active:hover { background: var(--accent); }
.seg.letters a { min-width: 38px; padding: 7px 0; font-weight: 600; }

/* mobile filter toggle (hidden on desktop) */
#filter-toggle {
  display: none; width: 100%; align-items: center; gap: 10px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 14px; font: inherit; font-size: 14px; font-weight: 600;
  color: var(--fg); cursor: pointer; text-align: left;
}
#filter-toggle .sum {
  color: var(--muted); font-size: 13px; font-weight: 400;
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  text-align: right;
}
#filter-toggle .chev { transition: transform .2s; color: var(--muted); }
.filters.open #filter-toggle .chev { transform: rotate(180deg); }

main { max-width: 1500px; margin: 0 auto; padding: 12px 24px 72px; }
section.design {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 26px 28px 30px; margin-top: 28px;
  scroll-margin-top: 64px;
}
.sec-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 14px; }
.sec-head h2 { font-size: 20px; }
.designer { color: var(--muted); font-weight: 400; font-size: 16px; }
.badge { font-size: 12px; padding: 3px 10px; border-radius: 999px; font-weight: 600; }
.badge.kultur { background: color-mix(in srgb, var(--gold) 16%, transparent); color: var(--gold); }
.badge.natur { background: color-mix(in srgb, var(--teal) 16%, transparent); color: var(--teal); }
.desc { margin-top: 8px; color: var(--muted); max-width: 100ch; }
.desc summary { cursor: pointer; font-size: 13px; user-select: none; }
.desc p { margin-top: 6px; font-size: 14px; }

.grid {
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 20px 16px; margin-top: 20px;
}
.cell { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.denom {
  font-size: 12px; font-weight: 700; color: var(--dc);
  border-bottom: 2px solid var(--dc); padding-bottom: 3px; align-self: start;
}
.note {
  position: relative; display: flex; flex-direction: column;
  align-items: center; gap: 6px;
}
.motif {
  font-size: 11.5px; line-height: 1.35; color: var(--muted);
  text-align: center; max-width: 100%;
}
a.entity {
  color: inherit; cursor: pointer;
  text-decoration: underline dotted; text-underline-offset: 2px;
}
a.entity:hover { color: var(--accent); }

/* entity info popover */
#info {
  position: fixed; inset: 0; z-index: 120; display: none;
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 24px;
}
#info.open { display: flex; }
.info-card {
  position: relative; max-width: 420px; width: 100%;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 24px 26px;
  box-shadow: 0 20px 70px var(--shadow-strong);
}
.info-card h3 { font-size: 19px; padding-right: 28px; }
.info-card p { color: var(--muted); margin: 10px 0 18px; font-size: 14px; }
.info-close {
  position: absolute; top: 10px; right: 12px;
  border: 0; background: none; color: var(--muted);
  font-size: 24px; line-height: 1; cursor: pointer; padding: 4px;
}
.info-close:hover { color: var(--fg); }
.grid .cell { align-self: start; }
.note img {
  display: block; width: 100%; height: auto; border-radius: 5px;
  box-shadow: 0 1px 6px var(--shadow);
  cursor: zoom-in; transition: transform .18s ease, box-shadow .18s ease;
  position: relative;
}
.note img:hover, .note img:focus-visible {
  transform: scale(var(--zoom, 2.3));
  box-shadow: 0 12px 40px var(--shadow-strong);
  z-index: 20; outline: none;
}
.note:has(img:hover), .note:has(img:focus-visible) { z-index: 20; }

/* filters */
body[data-denom]:not([data-denom="all"]) .cell { display: none; }
body[data-denom="5"]   .cell[data-denom="5"],
body[data-denom="10"]  .cell[data-denom="10"],
body[data-denom="20"]  .cell[data-denom="20"],
body[data-denom="50"]  .cell[data-denom="50"],
body[data-denom="100"] .cell[data-denom="100"],
body[data-denom="200"] .cell[data-denom="200"] { display: flex; }
body:not([data-denom="all"]) .grid { grid-template-columns: repeat(auto-fit, minmax(220px, 440px)); }
body:not([data-denom="all"]) .note img { --zoom: 1.6; }
body[data-side="front"] .note.back { display: none; }
body[data-side="back"] .note.front { display: none; }
body[data-theme-f="kultur"] section[data-theme="natur"] { display: none; }
body[data-theme-f="natur"] section[data-theme="kultur"] { display: none; }

/* lightbox */
#lb {
  position: fixed; inset: 0; z-index: 100; display: none;
  background: color-mix(in srgb, var(--bg) 94%, transparent); cursor: zoom-out;
  flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  padding: 30px;
}
#lb.open { display: flex; }
#lb img { max-width: 96vw; max-height: 80vh; border-radius: 6px;
          box-shadow: 0 20px 80px var(--shadow-strong); }
#lb .cap { color: var(--muted); font-size: 14px; text-align: center; padding: 0 60px; }
.lbnav {
  position: fixed; top: 50%; transform: translateY(-50%); z-index: 101;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--panel); color: var(--fg);
  font-size: 24px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  padding: 0 0 3px;
}
.lbnav:hover { border-color: var(--accent); color: var(--accent); }
.lbnav.prev { left: 14px; }
.lbnav.next { right: 14px; }
#lb .spin { display: none; }
#lb.loading .spin {
  display: block; position: fixed; top: 50%; left: 50%;
  width: 42px; height: 42px; margin: -21px 0 0 -21px; z-index: 102;
  border-radius: 50%;
  border: 3px solid color-mix(in srgb, var(--fg) 25%, transparent);
  border-top-color: var(--accent);
  animation: lbspin .8s linear infinite;
}
#lb.loading img { filter: brightness(.75); }
@keyframes lbspin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  #lb.loading .spin { animation-duration: 2s; }
}

/* footer */
footer {
  border-top: 1px solid var(--line); margin-top: 20px;
  padding: 26px 24px 40px; color: var(--muted); font-size: 13px;
}
footer .inner { max-width: 1100px; margin: 0 auto; display: grid; gap: 10px; }
footer .links { display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer .madeby {
  display: flex; align-items: center; gap: 10px;
  color: var(--muted); text-decoration: none; width: fit-content;
}
footer .madeby:hover { color: var(--fg); }
footer .madeby img.logo-on-dark { display: block; }
footer .madeby img.logo-on-light { display: none; }
@media (prefers-color-scheme: light) {
  footer .madeby img.logo-on-dark { display: none; }
  footer .madeby img.logo-on-light { display: block; }
}

/* legal pages */
.legal { max-width: 820px; margin: 0 auto; padding: 10px 24px 60px; }
.legal h1 { font-size: 26px; margin: 18px 0 6px; }
.legal h2 { font-size: 19px; margin: 26px 0 6px; }
.legal h3 { font-size: 16px; margin: 18px 0 4px; }
.legal p, .legal li { color: var(--muted); margin-top: 6px; }
.legal ul { padding-left: 22px; margin-top: 6px; }
.legal strong { color: var(--fg); }
.legal .backlink { display: inline-block; margin-top: 18px; }

@media (max-width: 1100px) { .grid { grid-template-columns: repeat(3, 1fr); } }

/* collapsed filter panel on small screens */
@media (max-width: 900px) {
  .hero-band::after { display: none; }
  nav.filters { padding: 8px 12px; }
  #filter-toggle { display: flex; }
  .filters .groups {
    display: none; margin-top: 8px;
    flex-direction: column; align-items: stretch; gap: 8px;
  }
  .filters.open .groups { display: flex; }
  .seg {
    overflow-x: auto; border-radius: 12px;
    scrollbar-width: none; -webkit-overflow-scrolling: touch;
  }
  .seg::-webkit-scrollbar { display: none; }
  .seg > * { flex: 1 0 auto; padding: 11px 14px; font-size: 14px; }
  .seg.letters a { min-width: 44px; padding: 11px 0; }
  section.design { scroll-margin-top: 76px; }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: repeat(2, 1fr); gap: 14px 12px; }
  .note img:hover { transform: none; }
  .hero { padding: 36px 20px 44px; }
  .hero h1 { font-size: 28px; }
  .hero .actions .btn, .cta-bottom .actions .btn {
    width: 100%; max-width: 420px; text-align: center;
  }
  section.design { padding: 18px 16px 20px; }
  main { padding-left: 12px; padding-right: 12px; }
  .lbnav { width: 40px; height: 40px; }
  .lbnav.prev { left: 8px; }
  .lbnav.next { right: 8px; }
  #lb { padding: 16px; }
  #lb .cap { padding: 0 48px; }
}