:root {
  --bg: #070a18;
  --bg-2: #0d1330;
  --panel: #121a3a;
  --panel-2: #0e1530;
  --line: #26315f;
  --text: #eef1ff;
  --muted: #97a3d0;
  --accent: #7c9bff;
  --accent-2: #a679ff;
  --field-bg: #0a1030;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 80% -10%, #1a2454 0%, transparent 60%),
    radial-gradient(900px 600px at -10% 20%, #241748 0%, transparent 55%),
    var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------------- header ---------------- */
.topbar {
  display: flex;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
  padding: 22px clamp(16px, 4vw, 48px) 10px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, #fff, #cdd7ff 40%, transparent 42%),
    radial-gradient(circle at 68% 60%, #fff 0 12%, transparent 13%),
    radial-gradient(circle at 55% 32%, #fff 0 8%, transparent 9%),
    conic-gradient(from 0deg, #26356f, #4a2f7a, #26356f);
  box-shadow: 0 0 0 2px #2b366e inset;
}
.brand-name {
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.5px;
}
.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------------- layout ---------------- */
.layout {
  display: grid;
  grid-template-columns: minmax(320px, 400px) 1fr;
  gap: clamp(16px, 3vw, 32px);
  padding: 12px clamp(16px, 4vw, 48px) 40px;
  align-items: start;
}
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

/* ---------------- controls panel ---------------- */
.panel {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 6px 18px 18px;
  position: sticky;
  top: 12px;
}
@media (max-width: 900px) {
  .panel {
    position: static;
  }
}
fieldset {
  border: none;
  border-top: 1px solid var(--line);
  padding: 14px 0 6px;
  margin: 0;
}
fieldset:first-of-type {
  border-top: none;
}
legend {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.6px;
  color: var(--accent);
  font-weight: 700;
  padding: 0;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 10px 0;
}
.field > span {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
}
.field small {
  color: var(--muted);
  font-size: 0.72rem;
  opacity: 0.8;
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
input,
select {
  font: inherit;
  color: var(--text);
  background: var(--field-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 11px;
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 155, 255, 0.22);
}
select {
  cursor: pointer;
}
.toggles {
  justify-content: flex-start;
}
.chk {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 500;
  margin: 2px 0;
  cursor: pointer;
}
.chk input {
  width: auto;
}

/* ---------------- actions ---------------- */
.actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.btn {
  flex: 1;
  font: inherit;
  font-weight: 700;
  color: var(--text);
  background: #182150;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 11px 14px;
  cursor: pointer;
  transition: transform 0.08s, filter 0.15s, box-shadow 0.15s;
}
.btn:hover {
  filter: brightness(1.12);
}
.btn:active {
  transform: translateY(1px);
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #0a0f26;
  box-shadow: 0 6px 20px rgba(124, 155, 255, 0.35);
}
.actions + .actions {
  margin-top: 10px;
}
.tier-note {
  margin: 10px 0 0;
  font-size: 0.74rem;
  line-height: 1.45;
  color: var(--muted);
  opacity: 0.85;
}
.status {
  min-height: 1.1em;
  margin: 10px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}
.status.err {
  color: #ff9a9a;
}

/* ---------------- paywall placeholder dialog ---------------- */
.paywall {
  max-width: 30rem;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 26px;
}
.paywall::backdrop {
  background: rgba(4, 6, 18, 0.72);
}
.paywall h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}
.paywall p {
  margin: 0 0 12px;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--muted);
}
.paywall-honest {
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  color: var(--text) !important;
}

/* ---------------- preview ---------------- */
.preview {
  min-width: 0;
}
.stage {
  background: repeating-conic-gradient(#0a0f24 0% 25%, #0c1330 0% 50%) 0 0 / 28px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(10px, 2vw, 24px);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  overflow: auto;
}
.stage svg {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 78vh;
  border-radius: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}
.loading {
  color: var(--muted);
  font-size: 0.95rem;
}
.hint {
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  margin: 12px 4px 0;
}

/* ---------------- footer ---------------- */
.foot {
  padding: 8px clamp(16px, 4vw, 48px) 34px;
}
.foot p {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  opacity: 0.8;
  max-width: 70ch;
}
.foot-nav {
  margin-top: 18px;
}
.foot-nav h2 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.6px;
  color: var(--accent);
  margin: 0 0 8px;
}
.foot-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}
.foot-nav a {
  color: var(--muted);
  font-size: 0.8rem;
  text-decoration: none;
}
.foot-nav a:hover {
  color: var(--text);
  text-decoration: underline;
}