:root {
  color-scheme: light;
  --bg: #e8eeed;
  --panel: #ffffff;
  --ink: #171b1a;
  --muted: #435658;
  --accent: #0f4c5c;
  --accent-strong: #08323c;
  --border: #b9d3d2;
  --error-bg: #fce9e6;
  --error-ink: #8f1d14;
  --area-bg: #f7fbfa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: serif;
  background: var(--bg);
  color: var(--ink);
}

.page {
  max-width: 50em;
  margin: 0 auto;
  padding: 1em 24px 72px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 600;
}

.lead {
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(15, 76, 92, 0.08);
}

.meta {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: 16px;
}

.label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.mono {
  font-family: monospace;
  text-transform: uppercase;
  font-size: 0.9rem;
  word-break: break-all;
}

.error {
  min-height: 1.5em;
  margin-bottom: 16px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--error-bg);
  color: var(--error-ink);
  font-size: 0.95rem;
  display: none;
}

.error.show {
  display: block;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

textarea {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  padding: 12px 14px;
  font-family: monospace;
  font-size: 0.95rem;
  background: var(--area-bg);
  color: var(--ink);
  resize: vertical;
}

.actions {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

input[type="file"] {
  font-size: 0.9rem;
}

.download {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px dashed var(--border);
  background: var(--area-bg);
}

.download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 16px;
  background: var(--accent-strong);
  color: #fff;
  text-decoration: none;
  width: fit-content;
}

.download-link[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
}

button {
  appearance: none;
  border: none;
  border-radius: 16px;
  padding: 10px 20px;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(15, 76, 92, 0.18);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

button:hover {
  transform: translateY(-1px);
  background: #146174;
  box-shadow: 0 10px 20px rgba(15, 76, 92, 0.25);
}

button:active {
  transform: translateY(1px) scale(0.98);
  background: var(--accent-strong);
  box-shadow: inset 0 3px 8px rgba(0, 0, 0, 0.2);
}

button:focus-visible {
  outline: 3px solid rgba(15, 76, 92, 0.35);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.copy-status {
  padding: 4px 10px;
  border-radius: 999px;
  background: #e6f2f4;
  color: var(--accent-strong);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(2px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.copy-status.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .page {
    padding: 32px 16px 56px;
  }

  .panel {
    padding: 18px;
  }
}