:root {
  --bg: #0f0f1a;
  --bg-soft: #181826;
  --panel: #1f1f30;
  --panel-2: #262639;
  --border: #32324a;
  --text: #ececf5;
  --muted: #a3a3c2;
  --accent: #6d5efc;
  --accent-2: #8b7dff;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 70% -10%, #241f4d 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  max-width: 1100px;
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 0.55rem; font-weight: 700; font-size: 1.25rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  width: 2rem; height: 2rem;
  display: grid; place-items: center;
  border-radius: 8px;
  font-size: 0.85rem;
  letter-spacing: -0.5px;
}
.site-nav { display: flex; gap: 1.4rem; }
.site-nav a { color: var(--muted); font-size: 0.95rem; }
.site-nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { text-align: center; max-width: 720px; margin: 2.5rem auto 1rem; padding: 0 1rem; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin: 0 0 0.6rem;
  background: linear-gradient(135deg, #fff 30%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { color: var(--muted); font-size: 1.08rem; margin: 0; }

/* Generator layout */
.generator {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1.5rem;
  max-width: 1100px;
  margin: 2.5rem auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
  align-items: start;
}
@media (max-width: 860px) {
  .generator { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

/* Type tabs */
.type-tabs { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.25rem; }
.type-tab {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s ease;
}
.type-tab:hover { color: var(--text); border-color: var(--accent); }
.type-tab.is-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

/* Fields */
.fields { display: grid; gap: 0.9rem; margin-bottom: 1.25rem; }
.field { display: grid; gap: 0.35rem; }
.field.row-2 { grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.field label, .color-field, .select-field { font-size: 0.85rem; color: var(--muted); }
.fields input, .fields select, .fields textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  font-size: 0.95rem;
  font-family: inherit;
}
.fields input:focus, .fields select:focus, .fields textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(109, 94, 252, 0.25);
}
.fields textarea { resize: vertical; min-height: 90px; }
.checkbox-field { display: flex; align-items: center; gap: 0.5rem; color: var(--muted); font-size: 0.9rem; }
.checkbox-field input { width: auto; }

/* Style box */
.style-box {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem 1.2rem;
  margin: 0;
}
.style-box legend { color: var(--muted); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; padding: 0 0.4rem; }
.style-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.color-field, .select-field { display: grid; gap: 0.4rem; }
.color-field input[type="color"] {
  width: 100%; height: 38px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  cursor: pointer;
}
.select-field select {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 0.55rem 0.6rem;
  font-family: inherit;
  font-size: 0.95rem;
}

/* Preview */
.preview { position: sticky; top: 1rem; text-align: center; }
.qr-stage {
  background: #fff;
  border-radius: 12px;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  min-height: 320px;
  margin-bottom: 1.1rem;
}
#qrCanvas { max-width: 100%; height: auto; border-radius: 4px; }
#qrCanvas.is-hidden { display: none; }
.qr-empty { color: #9090a8; margin: 0; font-size: 0.95rem; }
.download-row { display: flex; gap: 0.7rem; justify-content: center; }
.qr-hint { color: var(--muted); font-size: 0.82rem; margin: 0.9rem 0 0; }

/* Buttons */
.btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  font-size: 0.92rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }

/* Sections */
.features, .faq { max-width: 1100px; margin: 4rem auto; padding: 0 clamp(1rem, 4vw, 3rem); }
.features h2, .faq h2 { font-size: 1.8rem; margin-bottom: 1.5rem; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.2rem; }
.feature-grid article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem;
}
.feature-grid h3 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.faq details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.6rem 1.1rem;
  margin-bottom: 0.8rem;
}
.faq summary { cursor: pointer; font-weight: 600; padding: 0.4rem 0; }
.faq details p { color: var(--muted); margin: 0.4rem 0 0.6rem; }

/* Footer */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  padding: 2.5rem 1rem 3rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}
.site-footer p { margin: 0; }

/* ============ Mode switch ============ */
.mode-switch { display: inline-flex; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 0.25rem; margin-bottom: 0.6rem; }
.mode-btn { border: none; background: transparent; color: var(--muted); padding: 0.45rem 1.1rem; border-radius: 999px; cursor: pointer; font-size: 0.92rem; font-family: inherit; }
.mode-btn.is-active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.mode-help { color: var(--muted); font-size: 0.85rem; margin: 0 0 1.25rem; }
.muted-inline { color: var(--muted); font-size: 0.85rem; }

/* ============ Dynamic destination editor ============ */
.dest-list { display: grid; gap: 0.6rem; }
.dest-row { display: flex; gap: 0.5rem; align-items: center; }
.dest-row input { flex: 1; min-width: 0; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 0.55rem 0.65rem; font-family: inherit; font-size: 0.92rem; }
.dest-row input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(109,94,252,0.25); }
.dest-fallback-label { font-size: 0.82rem; color: var(--muted); }
.btn-small { padding: 0.4rem 0.7rem; font-size: 0.85rem; }
.dest-x { flex: 0 0 auto; }
.dyn-result { font-size: 0.9rem; margin: 0.4rem 0 0; padding: 0.6rem 0.8rem; border-radius: 10px; }
.dyn-result.ok { background: rgba(72, 199, 142, 0.12); color: #6ee7b7; border: 1px solid rgba(72,199,142,0.3); }
.dyn-result.err { background: rgba(255, 99, 99, 0.12); color: #ff9b9b; border: 1px solid rgba(255,99,99,0.3); }

/* ============ Dashboard ============ */
.dash { max-width: 1000px; margin: 2rem auto; padding: 0 clamp(1rem, 4vw, 3rem); }
.dash-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.25rem; gap: 1rem; }
.dash-head h1, .dash-head h2 { margin: 0; }
.bulk-box { margin-bottom: 1.5rem; }
.bulk-box h3 { margin: 0 0 0.4rem; }
.bulk-box textarea { width: 100%; min-height: 110px; margin: 0.6rem 0; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 0.7rem; font-family: ui-monospace, monospace; font-size: 0.9rem; resize: vertical; }

.code-table { width: 100%; border-collapse: collapse; }
.code-table th, .code-table td { text-align: left; padding: 0.7rem 0.6rem; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
.code-table th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.code-table tbody tr { cursor: pointer; }
.code-table tbody tr:hover { background: var(--panel-2); }
.code-table .num { text-align: right; }
.badge { font-size: 0.75rem; padding: 0.15rem 0.55rem; border-radius: 999px; border: 1px solid var(--border); text-transform: capitalize; }
.badge-single { color: var(--muted); }
.badge-ab { color: #c4b5fd; border-color: rgba(139,125,255,0.4); }
.badge-geo { color: #7dd3fc; border-color: rgba(125,211,252,0.4); }

.detail { margin-top: 1.5rem; }
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 1rem; margin: 1.25rem 0; }
.stat-card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 1rem; text-align: center; }
.stat-num { font-size: 1.8rem; font-weight: 700; color: var(--text); }
.stat-label { color: var(--muted); font-size: 0.8rem; margin-top: 0.2rem; }

.charts { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 640px) { .charts { grid-template-columns: 1fr; } }
.chart-block h4 { margin: 0 0 0.7rem; font-size: 0.95rem; color: var(--text); }
.bars { display: grid; gap: 0.45rem; }
.bar-row { display: grid; grid-template-columns: 90px 1fr 36px; align-items: center; gap: 0.5rem; font-size: 0.85rem; }
.bar-label { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { background: var(--bg-soft); border-radius: 6px; height: 16px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 6px; min-width: 2px; }
.bar-val { text-align: right; color: var(--text); }