:root {
  --bg: #0f1720;
  --card: #16212e;
  --card-2: #1d2b3a;
  --line: #2a3a4d;
  --text: #e6edf3;
  --muted: #93a4b8;
  --accent: #4f9cf8;
  --accent-2: #1a73e8;
  --ok: #2ea043;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 70% -10%, #1c3350 0%, var(--bg) 55%);
  min-height: 100vh;
  line-height: 1.5;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.hero h1 {
  font-size: 2rem;
  margin: 0 0 8px;
}

.hero p {
  color: var(--muted);
  margin: 0 0 28px;
  font-size: 1.05rem;
}

.hero strong {
  color: var(--text);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 22px;
  box-shadow: var(--shadow);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-transform: uppercase;
}

.req {
  color: var(--accent);
}

input[type="text"],
input[type="number"],
select {
  appearance: none;
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 156, 248, 0.2);
}

select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.grid {
  display: grid;
  grid-template-columns: 1.4fr 1.4fr 1fr;
  gap: 14px;
  margin-bottom: 4px;
}

.grid .field {
  margin-bottom: 0;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  cursor: pointer;
}

.checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-2);
}

.hint {
  color: var(--muted);
  font-size: 0.86rem;
  margin: 14px 0 0;
}

code {
  background: #0b1119;
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 0.85em;
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.08s, background 0.15s, border-color 0.15s;
}

.btn:hover {
  border-color: var(--accent);
}
.btn:active {
  transform: translateY(1px);
}
.btn:disabled {
  opacity: 0.6;
  cursor: default;
}
.btn.primary {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #fff;
}
.btn.primary:hover {
  background: #1867d2;
}
.btn.small {
  padding: 7px 14px;
  font-size: 0.85rem;
}

/* Results */
.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.result-head h2 {
  font-size: 1.02rem;
  margin: 0;
}

.exports {
  display: flex;
  align-items: center;
  gap: 8px;
}

.export-label {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  max-height: 520px;
  overflow-y: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  position: sticky;
  top: 0;
  background: #0b1119;
  text-align: left;
  padding: 10px 12px;
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

tbody td {
  padding: 9px 12px;
  border-bottom: 1px solid rgba(42, 58, 77, 0.5);
  white-space: nowrap;
}

tbody tr:hover {
  background: rgba(79, 156, 248, 0.06);
}

.idx {
  color: var(--muted);
}
.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.link a {
  color: #9fd0ff;
  text-decoration: none;
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.82rem;
}
.link a:hover {
  text-decoration: underline;
}
.empty {
  text-align: center;
  color: var(--muted);
  padding: 28px 12px;
}

.cap-note {
  color: var(--muted);
  font-size: 0.84rem;
  margin: 12px 0 0;
}

/* Explainer */
.explainer summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}
.explainer p {
  color: var(--muted);
  font-size: 0.92rem;
}
.explainer pre {
  background: #0b1119;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  overflow-x: auto;
  font-size: 0.82rem;
  color: #9fd0ff;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}
.footer a {
  color: var(--text);
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ok);
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 640px) {
  .grid {
    grid-template-columns: 1fr;
  }
  .row {
    flex-direction: column;
    align-items: stretch;
  }
  .row .btn.primary {
    width: 100%;
    justify-content: center;
  }
}