:root {
  color-scheme: light;
  --ink: #141414;
  --muted: #616161;
  --line: #d8d8d8;
  --panel: #ffffff;
  --page: #f4f5f1;
  --accent: #21884a;
  --accent-strong: #126a36;
  --yellow: #fdffa7;
  --dark: #202124;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: var(--page);
  color: var(--ink);
}

.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-shell {
  width: min(100%, 440px);
}

.login-panel,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 50px rgba(20, 20, 20, 0.08);
}

.login-panel {
  padding: 32px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 40px;
  margin-bottom: 18px;
  border: 3px solid var(--dark);
  background: var(--yellow);
  color: var(--dark);
  font-weight: 900;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: 30px;
  line-height: 1.2;
}

h2 {
  margin-bottom: 18px;
  font-size: 22px;
}

p {
  color: var(--muted);
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

textarea {
  resize: vertical;
  line-height: 1.65;
}

.login-form {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

button {
  border: 0;
  border-radius: 6px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

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

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

.ghost-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.form-error {
  min-height: 22px;
  color: #b00020;
  font-size: 14px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 32px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  margin: 0;
}

.eyebrow {
  margin-bottom: 5px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 900;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(360px, 0.95fr) minmax(360px, 1.05fr);
  gap: 20px;
  padding: 24px 32px 32px;
}

.panel {
  padding: 22px;
}

.form-panel {
  display: grid;
  gap: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

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

#output {
  min-height: 500px;
  font-family: Consolas, "Microsoft YaHei", monospace;
  background: #f8f8f8;
}

.hint {
  margin: 12px 0 0;
  font-size: 14px;
}

@media (max-width: 880px) {
  .topbar {
    align-items: flex-start;
    padding: 18px;
  }

  .workspace {
    grid-template-columns: 1fr;
    padding: 18px;
  }

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

  h1 {
    font-size: 24px;
  }
}