:root {
  --bg: #0b0c0f;
  --bg-elevated: #12141a;
  --bg-soft: #181b24;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --faint: #71717a;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --accent-soft: rgba(139, 92, 246, 0.15);
  --danger: #fb7185;
  --ok: #34d399;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --font: "SF Pro Display", "Segoe UI", system-ui, -apple-system, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.1em 0.35em;
  border-radius: 6px;
}

a {
  color: #c4b5fd;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.bg-glow {
  pointer-events: none;
  position: fixed;
  inset: -20% -10% auto;
  height: 55vh;
  background:
    radial-gradient(ellipse at 30% 0%, rgba(139, 92, 246, 0.28), transparent 55%),
    radial-gradient(ellipse at 80% 10%, rgba(34, 211, 238, 0.12), transparent 45%);
  z-index: 0;
}

.topbar,
main,
.footer {
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text small {
  color: var(--muted);
  font-size: 0.75rem;
}

.nav {
  display: flex;
  gap: 1rem;
  align-items: center;
  font-size: 0.9rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
}

.nav .ghost {
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  color: var(--text);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

.hero {
  padding: 1.5rem 0 2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 1rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #ddd6fe;
  font-size: 0.8rem;
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.grad {
  background: linear-gradient(105deg, #c4b5fd 0%, #22d3ee 55%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent),
    var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.panel-head {
  margin-bottom: 1.25rem;
}

.panel-head h2 {
  margin: 0 0 0.25rem;
  font-size: 1.15rem;
}

.panel-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.label {
  font-size: 0.85rem;
  color: var(--muted);
}

.label em {
  font-style: normal;
  color: var(--faint);
  margin-left: 0.35rem;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.label-actions {
  display: flex;
  gap: 0.75rem;
}

input[type="text"],
textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  font: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

textarea {
  resize: vertical;
  min-height: 220px;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.5;
}

input:focus,
textarea:focus {
  border-color: rgba(139, 92, 246, 0.55);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.dropzone {
  position: relative;
  border-radius: var(--radius-sm);
}

.dropzone.dragover textarea {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

.drop-hint {
  margin-top: 0.55rem;
  color: var(--faint);
  font-size: 0.85rem;
}

.file-label {
  color: #c4b5fd;
  cursor: pointer;
  text-decoration: underline;
}

.hint {
  margin: 0.35rem 0 0;
  color: var(--faint);
  font-size: 0.8rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 0.25rem;
}

.primary,
.secondary,
.link-btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font: inherit;
  border-radius: 999px;
  padding: 0.7rem 1.25rem;
  transition: transform 0.12s, opacity 0.12s, background 0.12s;
}

.primary {
  background: linear-gradient(135deg, #8b5cf6, #6366f1 55%, #22d3ee);
  color: white;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.35);
}

.primary:hover {
  transform: translateY(-1px);
}

.primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.secondary,
.link-btn {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border-strong);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.secondary:hover,
.link-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.text-btn {
  appearance: none;
  border: none;
  background: none;
  color: #c4b5fd;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0;
}

.text-btn:hover {
  text-decoration: underline;
}

.fineprint {
  margin: 0;
  color: var(--faint);
  font-size: 0.82rem;
}

.form-error {
  margin: 0;
  color: var(--danger);
  background: rgba(251, 113, 133, 0.08);
  border: 1px solid rgba(251, 113, 133, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  font-size: 0.9rem;
}

.result {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  animation: fade-in 0.35s ease;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.result-badge {
  display: inline-flex;
  color: var(--ok);
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-size: 0.8rem;
  margin-bottom: 0.6rem;
}

.result h3 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 700px) {
  .result-grid {
    grid-template-columns: 1fr;
  }

  .qr-card {
    justify-self: center;
  }

  .nav a:not(.ghost) {
    display: none;
  }
}

.copy-row {
  display: flex;
  gap: 0.5rem;
}

.copy-row input {
  flex: 1;
  min-width: 0;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.9rem 0;
}

.qr-card {
  background: white;
  color: #111;
  border-radius: var(--radius);
  padding: 0.85rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.qr-card p {
  margin: 0.4rem 0 0;
  font-size: 0.8rem;
  color: #52525b;
}

.qr-card canvas {
  display: block;
  width: 180px;
  height: 180px;
}

.token-box {
  margin-top: 0.5rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  background: rgba(0, 0, 0, 0.2);
}

.token-box summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.88rem;
}

.token-box[open] summary {
  margin-bottom: 0.6rem;
}

.again {
  margin-top: 1rem;
}

.steps,
.faq {
  margin-top: 3rem;
}

.steps h2,
.faq h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}

.steps ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.steps li {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  counter-increment: step;
}

.steps li strong {
  font-size: 1rem;
}

.steps li span {
  color: var(--muted);
  font-size: 0.9rem;
}

.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin-bottom: 0.55rem;
  background: rgba(255, 255, 255, 0.02);
}

.faq summary {
  cursor: pointer;
  font-weight: 500;
}

.faq p {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer p {
  margin: 0.25rem 0;
}

.footer .muted {
  color: var(--faint);
  font-size: 0.82rem;
}

.footer .dot {
  margin: 0 0.35rem;
  opacity: 0.5;
}

/* Stats page */
.stats-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.stats-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.stats-card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0;
}

@media (max-width: 560px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }
}

.stat {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem;
}

.stat .k {
  color: var(--muted);
  font-size: 0.8rem;
}

.stat .v {
  font-size: 1.4rem;
  font-weight: 650;
  margin-top: 0.2rem;
}

.chart {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 120px;
  margin-top: 0.75rem;
}

.chart .bar {
  flex: 1;
  min-width: 6px;
  background: linear-gradient(180deg, #a78bfa, #6366f1);
  border-radius: 4px 4px 0 0;
  opacity: 0.85;
}

.chart-empty {
  color: var(--faint);
  font-size: 0.9rem;
}