:root {
  --bg: #0b1020;
  --panel: #121a33;
  --ink: #e9eefb;
  --muted: #a7b3d8;
  --primary: #5aa9ff;
  --primary-ink: #061121;
  --ring: #2d3d73;
  --shadow: rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body.dnd-tool {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, #1a2758 0%, transparent 60%), var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  padding: 24px 20px 10px;
  background: rgba(11, 16, 32, 0.6);
  border-bottom: 1px solid rgba(45, 61, 115, 0.4);
}

.top-bar {
  max-width: 1100px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
}

.back-link {
  color: var(--ink);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--ring);
  transition: all 0.2s ease;
}

.back-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(90, 169, 255, 0.4);
}

.hero-content {
  max-width: 1100px;
  margin: 0 auto 20px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 2.2rem;
}

.hero p {
  margin: 6px 0;
  color: var(--muted);
  line-height: 1.6;
}

.hero .rate {
  color: var(--primary);
  font-weight: 600;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  flex: 1;
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)), var(--panel);
  border: 1px solid var(--ring);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 12px 28px var(--shadow);
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 1.3rem;
}

.panel-note {
  margin: -6px 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.field-grid {
  display: grid;
  gap: 14px;
}

.checkbox-grid {
  display: grid;
  gap: 10px;
}

.check-label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.check-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
  color: var(--muted);
}

label.is-hidden {
  display: none;
}

input[type="number"] {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(45, 61, 115, 0.6);
  background: rgba(7, 12, 28, 0.7);
  color: var(--ink);
  font-size: 1rem;
}

input[type="number"]:focus {
  outline: none;
  border-color: rgba(90, 169, 255, 0.8);
  box-shadow: 0 0 0 2px rgba(90, 169, 255, 0.2);
}

.results {
  display: grid;
  gap: 12px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  background: rgba(7, 12, 28, 0.6);
  border: 1px solid rgba(45, 61, 115, 0.4);
}

.result-label {
  color: var(--muted);
}

.result-value {
  font-weight: 600;
  color: var(--ink);
}

.status {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.status.error {
  color: #ff8a8a;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

button {
  border: none;
  border-radius: 12px;
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: var(--primary-ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(90, 169, 255, 0.35);
}

button.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ring);
}

button.secondary:hover {
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

.footer {
  padding: 20px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid rgba(45, 61, 115, 0.3);
}

.footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .actions {
    flex-direction: column;
  }

  button,
  button.secondary {
    width: 100%;
  }
}