:root {
  --bg-1: #f8f4e9;
  --bg-2: #e9f3ff;
  --ink: #1f1f24;
  --muted: #5c6270;
  --panel: #ffffffd6;
  --line: #d7dce8;
  --primary: #0f766e;
  --primary-ink: #ffffff;
  --warn: #9a3412;
  --radius: 16px;
  --shadow: 0 18px 40px rgba(31, 31, 36, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Aptos", "Segoe UI Variable", "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--ink);
}

body {
  background:
    radial-gradient(circle at 12% 18%, #ffe3b8 0, transparent 35%),
    radial-gradient(circle at 82% 8%, #bfddff 0, transparent 38%),
    linear-gradient(120deg, var(--bg-1), var(--bg-2));
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.card {
  width: min(1240px, 100%);
  border: 1px solid #ffffff7d;
  background: var(--panel);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  padding: 22px;
  min-height: 82vh;
  animation: rise 360ms ease-out;
}

.card-header h1 {
  margin: 0;
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
}

.card-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.header-subline {
  margin-top: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.header-subline p {
  margin: 0;
}

.api-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.api-inline label {
  white-space: nowrap;
}

.api-inline input {
  width: 220px;
  padding: 6px 8px;
  border-radius: 9px;
  font-size: 0.82rem;
}

.api-quick-btn,
.api-apply-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 9px;
  padding: 6px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}

.controls {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr auto 1fr;
  align-items: end;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  color: var(--muted);
  font-size: 0.9rem;
}

select,
input,
textarea,
button {
  font: inherit;
}

select,
input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

select {
  padding: 10px 12px;
}

input {
  padding: 10px 12px;
}

.swap-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 10px;
  height: 42px;
  width: 64px;
  cursor: pointer;
}

.panes {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.pane {
  display: grid;
  gap: 8px;
}

.pane-title {
  font-weight: 600;
}

textarea {
  min-height: 360px;
  resize: vertical;
  padding: 12px;
  line-height: 1.45;
}

textarea[readonly] {
  background: #f8fafc;
}

.pane-footer {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  min-height: 20px;
}

.actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
}

.translate-btn,
.clear-btn {
  border: 0;
  border-radius: 12px;
  padding: 10px 16px;
  cursor: pointer;
}

.translate-btn {
  background: var(--primary);
  color: var(--primary-ink);
  font-weight: 600;
}

.translate-btn[disabled] {
  opacity: 0.65;
  cursor: wait;
}

.clear-btn {
  background: #e5e7eb;
  color: #374151;
}

#status-text.error {
  color: var(--warn);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 840px) {
  .card {
    padding: 16px;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .swap-btn {
    justify-self: start;
    width: 100%;
  }

  .api-inline {
    width: 100%;
  }

  .api-inline input {
    width: 100%;
  }

  .panes {
    grid-template-columns: 1fr;
  }

  textarea {
    min-height: 220px;
  }
}