:root {
  --bg: #0d1117;
  --panel: #111726;
  --accent: #22d3ee;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  background: linear-gradient(135deg, #0d1117, #0f172a);
  color: var(--text);
  padding: 32px 16px;
}

main {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
}

footer {
  width: 100%;
  text-align: center;
  padding-top: 24px;
}

h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.02em;
}

.lede {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.credit {
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(34, 211, 238, 0.12);
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

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

a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
}

a:hover {
  color: #ffffff;
}

.card {
  background: linear-gradient(180deg, var(--panel), #0c1220);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.card + .card {
  margin-top: 8px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

#modelInputHeader {
  margin-bottom: 0 !important;
}

.input-header {
  padding-bottom: 8px;
}

textarea {
  width: 100%;
  min-height: 280px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(12, 17, 28, 0.9);
  color: var(--text);
  padding: 12px;
  font-family:
    "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.4;
  resize: vertical;
}

textarea:focus {
  outline: 1px solid var(--accent);
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

button {
  border: none;
  border-radius: 10px;
  padding: 11px 14px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  color: #0b1220;
  background: linear-gradient(135deg, var(--accent), #67e8f9);
  transition:
    transform 0.08s ease,
    filter 0.12s ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

.status {
  font-size: 13px;
  color: var(--muted);
  min-height: 18px;
}

.output-block {
  min-height: 180px;
  background: rgba(12, 17, 28, 0.9);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 12px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  color: var(--text);
  font-family:
    "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
}

th,
td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

th:first-child,
td:first-child {
  text-align: right;
  width: 64px;
  background: rgba(34, 211, 238, 0.08);
  color: var(--text);
}

th {
  background: rgba(148, 163, 184, 0.12);
}

.plain-output {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family:
    "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.stats-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.stat-line {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(12, 17, 28, 0.7);
}

.stat-title {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 4px;
  letter-spacing: 0.01em;
}

.stat-equation {
  margin: 0;
  font-family:
    "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 15px;
  line-height: 1.5;
  white-space: pre-line;
}

select {
  background: rgba(12, 17, 28, 0.9);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
}

.input-header {
  display: flex;
  justify-content: flex-start;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

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

.twise-control label {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.twise-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

@media (max-width: 640px) {
  body {
    padding: 24px 12px 36px;
  }
  textarea {
    min-height: 220px;
  }
  .credit {
    align-items: flex-start;
  }
}