/* Two tones: ink and accent. Everything else is a tint of ink over paper. */
:root {
  --ink: #1b1f3b;
  --accent: #e85d04;
  --paper: #faf8f3;
  --ink-90: color-mix(in srgb, var(--ink) 90%, var(--paper));
  --ink-60: color-mix(in srgb, var(--ink) 60%, var(--paper));
  --ink-40: color-mix(in srgb, var(--ink) 40%, var(--paper));
  --ink-15: color-mix(in srgb, var(--ink) 15%, var(--paper));
  --ink-8: color-mix(in srgb, var(--ink) 8%, var(--paper));
  --ink-4: color-mix(in srgb, var(--ink) 4%, var(--paper));
  --accent-15: color-mix(in srgb, var(--accent) 15%, var(--paper));
  --on-accent: #1b1f3b;
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ece9df;
    --paper: #14162b;
    --accent: #ff7a2f;
    --on-accent: #14162b;
  }
}

*, *::before, *::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--paper);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Header */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--ink-15);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: baseline; gap: 10px; }
.brand h1 { font-size: 18px; margin: 0; font-weight: 650; letter-spacing: -0.01em; }
.brand-sub { color: var(--ink-60); font-size: 13px; }
.mark {
  width: 22px; height: 22px; border-radius: 6px; background: var(--ink);
  align-self: center; position: relative;
}
.mark::after {
  content: ""; position: absolute; inset: 5px 6px 6px;
  border-left: 3px solid var(--accent); border-bottom: 3px solid var(--accent);
  transform: skewX(-15deg);
  border-radius: 1px;
}

.key { display: flex; align-items: center; gap: 10px; }
.key-label { font-size: 13px; color: var(--ink-60); }
.key-field { display: flex; align-items: center; position: relative; }
.key-field input {
  font: inherit; font-size: 13px; font-family: var(--mono);
  padding: 7px 36px 7px 10px; width: 260px; max-width: 60vw;
  border: 1px solid var(--ink-15); border-radius: 8px;
  background: var(--paper); color: var(--ink);
}
.key-field input:focus { border-color: var(--ink-40); outline-offset: 0; }
.key-field input.has-key { border-color: var(--accent); }
.key-link { font-size: 13px; color: var(--accent); text-decoration: none; font-weight: 500; }
.key-link:hover { text-decoration: underline; }

.icon-btn {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border: 0; border-radius: 6px;
  background: transparent; color: var(--ink-60); cursor: pointer;
  display: grid; place-items: center; padding: 0;
}
.icon-btn:hover { background: var(--ink-8); color: var(--ink); }
.icon-btn[aria-pressed="true"] { color: var(--accent); }
.icon-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Main */
.app {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 20px 24px 40px;
  flex: 1;
}

.langbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  align-items: end;
  gap: 12px;
  margin-bottom: 12px;
}

.lang-field label,
.script legend {
  display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--ink-60); margin-bottom: 4px;
}

select {
  font: inherit; width: 100%; padding: 9px 36px 9px 12px;
  border: 1px solid var(--ink-15); border-radius: 8px;
  background-color: var(--paper); color: var(--ink);
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231b1f3b' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; background-size: 14px;
  cursor: pointer;
}
@media (prefers-color-scheme: dark) {
  select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ece9df' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); }
}
select:hover { border-color: var(--ink-40); }
select:focus { border-color: var(--ink-40); outline-offset: 0; }

.swap {
  width: 40px; height: 40px; border-radius: 8px; border: 1px solid var(--ink-15);
  background: var(--paper); color: var(--ink); cursor: pointer; display: grid; place-items: center;
  transition: transform 160ms ease, background-color 120ms ease;
}
.swap svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.swap:hover { background: var(--ink-8); color: var(--accent); }
.swap:active { transform: scale(0.94); }

.script {
  border: 0; padding: 0; margin: 0;
  display: grid; grid-template-columns: auto auto; gap: 0;
}
.script legend { grid-column: 1 / -1; }
.script label { position: relative; cursor: pointer; }
.script input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.script span {
  display: block; padding: 9px 14px; font-size: 14px; font-weight: 500;
  border: 1px solid var(--ink-15); color: var(--ink-60); background: var(--paper);
  user-select: none;
}
.script label:first-of-type span { border-radius: 8px 0 0 8px; }
.script label:last-of-type span { border-radius: 0 8px 8px 0; border-left: 0; }
.script input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.script input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.script input:disabled + span { opacity: 0.4; cursor: not-allowed; }
.script input:disabled { cursor: not-allowed; }

/* Panels */
.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.panel {
  border: 1px solid var(--ink-15);
  border-radius: var(--radius);
  background: var(--paper);
  display: flex; flex-direction: column;
  min-height: 300px;
  overflow: hidden;
}
.panel:focus-within { border-color: var(--ink-40); }
.panel-out { background: var(--ink-4); }

textarea, .output {
  flex: 1; padding: 16px 18px; margin: 0;
  font: inherit; font-size: 18px; line-height: 1.55;
  color: var(--ink); background: transparent; border: 0; resize: none;
  min-height: 240px; white-space: pre-wrap; overflow-wrap: anywhere;
}
textarea:focus, .output:focus { outline: none; }
textarea::placeholder, .placeholder { color: var(--ink-40); }
.output { overflow: auto; }
.output.is-loading { color: var(--ink-40); animation: pulse 1.2s ease-in-out infinite; }
.output.is-error { color: var(--accent); font-size: 15px; }
@keyframes pulse { 50% { opacity: 0.45; } }

.panel-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px 8px 18px; min-height: 40px;
  border-top: 1px solid var(--ink-8);
}
.meta { font-size: 12.5px; color: var(--ink-60); font-variant-numeric: tabular-nums; }

.notice {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 12px 10px 18px; font-size: 13.5px;
  background: var(--accent-15); color: var(--ink);
  border-top: 1px solid var(--accent);
}

.text-btn {
  font: inherit; font-size: 13px; font-weight: 600; padding: 5px 10px;
  border: 0; border-radius: 6px; background: transparent; color: var(--ink); cursor: pointer;
}
.text-btn:hover { background: var(--ink-8); color: var(--accent); }
.text-btn.done { color: var(--accent); }

/* Actions */
.actions { display: flex; align-items: center; gap: 16px; margin-top: 14px; flex-wrap: wrap; }

.primary {
  font: inherit; font-size: 15px; font-weight: 650;
  display: inline-flex; align-items: center; gap: 12px;
  padding: 11px 16px 11px 20px; border: 0; border-radius: 8px;
  background: var(--accent); color: var(--on-accent); cursor: pointer;
  transition: transform 100ms ease, opacity 120ms ease;
}
.primary:hover { opacity: 0.92; }
.primary:active { transform: translateY(1px); }
.primary:disabled { opacity: 0.55; cursor: progress; }
.primary kbd {
  font: inherit; font-size: 12px; font-weight: 600; padding: 2px 7px; border-radius: 5px;
  background: color-mix(in srgb, var(--on-accent) 14%, transparent); color: var(--on-accent);
}

.status { margin: 0; font-size: 13.5px; color: var(--ink-60); min-height: 1.5em; }
.status.is-error { color: var(--accent); font-weight: 500; }

/* Request preview */
.request { margin-top: 24px; border: 1px solid var(--ink-15); border-radius: var(--radius); }
.request summary {
  cursor: pointer; padding: 10px 16px; font-size: 13px; font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-60);
  list-style: none; display: flex; align-items: center; gap: 8px;
}
.request summary::-webkit-details-marker { display: none; }
.request summary::before {
  content: ""; width: 6px; height: 6px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(-45deg); transition: transform 120ms ease; margin-right: 4px;
}
.request[open] summary::before { transform: rotate(45deg); }
.request summary:hover { color: var(--ink); }
.request-body { border-top: 1px solid var(--ink-15); }
.request-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px 0 16px; }
.request pre {
  margin: 0; padding: 12px 16px 16px; overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.5; color: var(--ink-90);
}

/* History */
.history { margin-top: 24px; }
.history-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.history h2 { font-size: 13px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-60); margin: 0; }
.history-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.history-item {
  width: 100%; text-align: left; font: inherit; cursor: pointer;
  display: grid; grid-template-columns: 96px 1fr; gap: 12px; align-items: baseline;
  padding: 8px 12px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--ink);
}
.history-item:hover { background: var(--ink-4); border-color: var(--ink-15); }
.history-item .pair { font-size: 12px; font-weight: 600; color: var(--accent); letter-spacing: 0.03em; text-transform: uppercase; white-space: nowrap; }
.history-item .snippet { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-item .snippet small { color: var(--ink-60); }

/* Footer */
.foot { padding: 14px 24px; border-top: 1px solid var(--ink-15); }
.foot p { margin: 0; font-size: 12.5px; color: var(--ink-60); text-align: center; }

@media (max-width: 720px) {
  .top { padding: 12px 16px; }
  .key { width: 100%; }
  .key-field { flex: 1; }
  .key-field input { width: 100%; max-width: none; }
  .key-label { display: none; }
  .app { padding: 16px 16px 32px; }
  .langbar { grid-template-columns: 1fr auto 1fr; }
  .script { grid-column: 1 / -1; }
  .panels { grid-template-columns: 1fr; }
  .panel { min-height: 220px; }
  textarea, .output { min-height: 160px; font-size: 17px; }
  .history-item { grid-template-columns: 1fr; gap: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}