:root {
  color-scheme: dark;
  --bg: #07110e;
  --panel: #0d1b17;
  --panel-2: #11241e;
  --line: #203b32;
  --text: #eef8f3;
  --muted: #94aca2;
  --green: #6ee7b7;
  --green-2: #34d399;
  --danger: #fb7185;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% -10%, rgba(52, 211, 153, .18), transparent 35rem),
    radial-gradient(circle at 100% 25%, rgba(45, 212, 191, .08), transparent 30rem),
    var(--bg);
}
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .13em;
}
.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid #315d4d;
  border-radius: 11px;
  color: var(--green);
  background: rgba(110, 231, 183, .06);
  letter-spacing: 0;
}
.hero { padding: 64px 0 34px; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .16em;
}
h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(34px, 7vw, 58px);
  line-height: 1.05;
  letter-spacing: -.045em;
}
.hero > p:last-child {
  max-width: 590px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}
.mode-switch {
  display: inline-flex;
  gap: 5px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #081510;
}
.mode-tab {
  min-height: 42px;
  padding: 0 18px;
  color: var(--muted);
  background: transparent;
}
.mode-tab.active {
  color: #052117;
  background: var(--green);
}
.card {
  margin-top: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(17, 36, 30, .96), rgba(10, 23, 19, .96));
  box-shadow: 0 20px 60px rgba(0, 0, 0, .18);
}
.step {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 22px;
}
.step > span {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: #062117;
  background: var(--green);
  font-weight: 900;
}
.step div { display: flex; flex-direction: column; gap: 3px; }
.step strong { font-size: 17px; }
.step small, label, .credential small, .code-result small { color: var(--muted); }
label {
  display: block;
  margin-bottom: 9px;
  font-size: 13px;
  font-weight: 650;
}
.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.label-row > span {
  color: var(--muted);
  font-size: 12px;
}
.label-row > span.over-limit { color: var(--danger); }
.input-row { display: flex; gap: 10px; }
input, textarea {
  min-width: 0;
  border: 1px solid #2b493e;
  border-radius: 12px;
  outline: none;
  color: var(--text);
  background: #07120e;
}
input {
  flex: 1;
  height: 50px;
  padding: 0 15px;
  text-transform: uppercase;
}
textarea {
  width: 100%;
  padding: 14px 15px;
  resize: vertical;
  line-height: 1.65;
}
input:focus, textarea:focus { border-color: var(--green-2); box-shadow: 0 0 0 3px rgba(52, 211, 153, .12); }
.batch-input {
  min-height: 180px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
button, .link {
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 750;
  transition: transform .16s ease, opacity .16s ease, background .16s ease;
}
button:active, .link:active { transform: translateY(1px); }
button:disabled { cursor: wait; opacity: .58; }
.primary {
  min-height: 50px;
  padding: 0 20px;
  color: #052117;
  background: var(--green);
}
.primary:hover { background: #8af0c8; }
.ghost, .copy {
  min-height: 42px;
  padding: 0 15px;
  color: var(--text);
  background: #173027;
}
.credential {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.credential > div { min-width: 0; display: flex; flex-direction: column; gap: 7px; }
.credential strong { overflow-wrap: anywhere; font-size: 17px; }
.actions { display: flex; gap: 10px; margin-top: 20px; }
.link { display: inline-grid; place-items: center; text-decoration: none; }
.wide { width: 100%; }
.code-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
  padding: 18px;
  border: 1px solid #35634f;
  border-radius: 14px;
  background: rgba(110, 231, 183, .07);
}
.code-result strong {
  margin-left: auto;
  color: var(--green);
  font-size: clamp(28px, 8vw, 42px);
  letter-spacing: .1em;
}
.save-tip {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 18px;
  padding: 14px 16px;
  border: 1px solid #35634f;
  border-radius: 13px;
  color: var(--green);
  background: rgba(110, 231, 183, .07);
}
.save-tip span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.format-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.format-option {
  display: flex;
  min-height: 92px;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
  padding: 15px;
  border: 1px solid var(--line);
  color: var(--text);
  text-align: left;
  background: #0a1713;
}
.format-option small {
  color: var(--muted);
  font-weight: 500;
  line-height: 1.45;
}
.format-option.active {
  border-color: var(--green-2);
  background: rgba(52, 211, 153, .1);
  box-shadow: 0 0 0 2px rgba(52, 211, 153, .08);
}
.format-description {
  min-height: 42px;
  margin: 16px 0 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}
.batch-output {
  min-height: 220px;
  color: #d6fff0;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  white-space: pre;
}
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.batch-errors {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.batch-errors summary {
  padding: 16px 0 4px;
  color: var(--danger);
  cursor: pointer;
  font-size: 13px;
  font-weight: 750;
}
.batch-errors ul {
  display: grid;
  gap: 9px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}
.batch-errors li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 11px 13px;
  border-radius: 10px;
  background: rgba(251, 113, 133, .06);
}
.batch-errors code {
  color: var(--text);
  overflow-wrap: anywhere;
}
.batch-errors li span { font-size: 12px; }
.message { min-height: 20px; margin: 13px 0 0; color: var(--muted); font-size: 13px; }
.message.error { color: var(--danger); }
.message.success { color: var(--green); }
.community-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  align-items: center;
  gap: 34px;
  margin-top: 16px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid #2c5144;
  border-radius: 20px;
  background:
    radial-gradient(circle at 86% 20%, rgba(110, 231, 183, .12), transparent 16rem),
    linear-gradient(145deg, rgba(17, 36, 30, .98), rgba(8, 21, 16, .98));
  box-shadow: 0 20px 60px rgba(0, 0, 0, .18);
}
.community-copy { min-width: 0; }
.community-eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .15em;
}
.community-card h2 {
  margin: 0;
  font-size: clamp(25px, 5vw, 34px);
  letter-spacing: -.025em;
}
.community-copy > p:not(.community-eyebrow) {
  max-width: 420px;
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}
.community-number {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 22px 0 18px;
}
.community-number span {
  color: var(--muted);
  font-size: 13px;
}
.community-number strong {
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 21px;
  letter-spacing: .04em;
}
.community-link {
  display: inline-grid;
  min-height: 46px;
  padding: 0 18px;
}
.community-qr {
  display: block;
  padding: 8px;
  border: 1px solid rgba(110, 231, 183, .3);
  border-radius: 18px;
  background: rgba(7, 17, 14, .7);
  transition: border-color .16s ease, transform .16s ease;
}
.community-qr:hover {
  border-color: var(--green);
  transform: translateY(-2px);
}
.community-qr img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}
.notes {
  display: flex;
  justify-content: center;
  gap: 22px;
  padding: 26px 0 0;
  color: #68877a;
  font-size: 12px;
}
.hidden { display: none !important; }

@media (max-width: 600px) {
  .shell { width: min(100% - 22px, 760px); padding-top: 18px; }
  .hero { padding: 46px 4px 24px; }
  .card { padding: 19px; border-radius: 17px; }
  .input-row, .actions { flex-direction: column; }
  .input-row .primary, .actions > * { width: 100%; }
  .mode-switch { display: flex; }
  .mode-tab { flex: 1; padding: 0 10px; }
  .format-grid { grid-template-columns: 1fr; }
  .result-actions { flex-direction: column; }
  .result-actions > * { width: 100%; }
  .code-result { flex-direction: column; text-align: center; }
  .code-result strong { margin: 0; }
  .community-card {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 22px;
  }
  .community-link { width: 100%; }
  .community-qr {
    width: min(100%, 300px);
    margin: 0 auto;
  }
  .notes { gap: 10px; flex-wrap: wrap; }
}