:root {
  --bg: #f4efe7;
  --paper: rgba(255, 252, 247, 0.92);
  --ink: #1f2933;
  --muted: #5b6b7a;
  --line: rgba(31, 41, 51, 0.12);
  --accent: #0f766e;
  --accent-strong: #115e59;
  --danger: #b42318;
  --shadow: 0 24px 60px rgba(78, 57, 35, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(180, 35, 24, 0.12), transparent 24%),
    linear-gradient(135deg, #f7f2ea, #efe6d8 56%, #f8f5ef);
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-strong);
  font-size: 12px;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.05;
}

.subcopy {
  margin: 12px 0 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 16px;
}

.workspace {
  display: grid;
  gap: 18px;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 18px;
  backdrop-filter: blur(10px);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

label {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
  font-weight: 700;
}

.editor {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  border: 1px solid rgba(31, 41, 51, 0.08);
  border-radius: 16px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  font: 14px/1.65 "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

.editor:focus {
  outline: 2px solid rgba(15, 118, 110, 0.25);
  border-color: rgba(15, 118, 110, 0.35);
}

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

button {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 11px 18px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
  font: 600 14px/1 "Noto Sans SC", "PingFang SC", sans-serif;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 41, 51, 0.18);
}

button.primary {
  background: var(--accent);
  color: #fff;
}

button.primary:hover {
  background: var(--accent-strong);
}

button.danger {
  color: var(--danger);
  border-color: rgba(180, 35, 24, 0.2);
}

#status {
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 20px, 1120px);
    padding-top: 24px;
  }

  .panel {
    padding: 14px;
    border-radius: 18px;
  }

  .editor {
    min-height: 220px;
  }
}