:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #6b7280;
  --paper: #ffffff;
  --panel: #ffffff;
  --accent: #1f2937;
  --accent-strong: #111827;
  --soft: #f3f4f6;
  --teal: #0f766e;
  --line: #e5e7eb;
  --shadow: none;
  --focus: #2563eb;
  --btn-disabled-bg: #e5e7eb;
  --btn-disabled-text: #9ca3af;
  --btn-secondary-bg: #f9fafb;
  --btn-secondary-border: #d1d5db;
  --btn-secondary-text: #111827;
  --btn-secondary-hover: #f3f4f6;
  --btn-secondary-active: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial,
    sans-serif;
  color: var(--ink);
  background: #ffffff;
  min-height: 100vh;
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.hero {
  display: grid;
  gap: 14px;
  margin-bottom: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #f3f4f6;
  color: #374151;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: lowercase;
  width: fit-content;
}

h1 {
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  font-size: clamp(2rem, 3.8vw, 3rem);
  margin: 0;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 700px;
  line-height: 1.6;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 24px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

label {
  font-weight: 700;
  margin-bottom: 10px;
  display: inline-block;
}

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

input[type="text"] {
  flex: 1 1 320px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #ffffff;
  font-size: 1rem;
  letter-spacing: 1px;
}

input[type="text"]:focus {
  outline: 2px solid rgba(37, 99, 235, 0.35);
  border-color: var(--focus);
}

button {
  border: 1px solid transparent;
  cursor: pointer;
  padding: 12px 18px;
  min-height: 44px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  --spinner-color: #ffffff;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

button:hover:enabled {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

button:active:enabled {
  background: #0f172a;
  transform: translateY(0) scale(0.98);
}

button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

button:disabled:not([data-loading="true"]),
button[aria-disabled="true"]:not([data-loading="true"]) {
  background: var(--btn-disabled-bg);
  border-color: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  cursor: not-allowed;
  transform: none;
}

button[data-loading="true"] {
  color: transparent;
  pointer-events: none;
}

button[data-loading="true"]::after {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--spinner-color);
  border-right-color: transparent;
  position: absolute;
  animation: spin 0.8s linear infinite;
}

button[aria-pressed="true"] {
  background: #0f172a;
  border-color: #0f172a;
  color: #ffffff;
}

.helper-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--muted);
  gap: 12px;
  flex-wrap: wrap;
}

#status {
  font-weight: 600;
}

.status-error {
  color: #b91c1c;
}

.status-ok {
  color: #0f766e;
}

.status-warn {
  color: #b45309;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
}

th,
td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

th {
  width: 35%;
  background: #f9fafb;
  font-weight: 700;
}

tr:last-child td,
tr:last-child th {
  border-bottom: none;
}

.footer-note {
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 18px;
  margin-top: 12px;
}

.copy-btn {
  background: var(--btn-secondary-bg);
  border-color: var(--btn-secondary-border);
  color: var(--btn-secondary-text);
  --spinner-color: #111827;
}

.copy-btn:hover:enabled {
  background: var(--btn-secondary-hover);
  border-color: #cbd5e1;
}

.copy-btn:active:enabled {
  background: var(--btn-secondary-active);
  border-color: #cbd5e1;
}

.copy-btn[aria-pressed="true"] {
  background: #111827;
  border-color: #111827;
  color: #ffffff;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 720px) {
  main {
    padding: 32px 18px 56px;
  }

  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  th {
    width: 45%;
  }
}