:root {
  --navy: #1F3A5F;
  --accent: #C25E2E;
  --ink: #262626;
  --grey: #595959;
  --line: #E5E1DA;
  --bg: #FAF8F5;
  --card: #FFFFFF;
  --pos: #1F7A4D;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.45;
}

.app { display: flex; flex-direction: column; min-height: 100vh; }

.header {
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.logo { display: flex; align-items: center; gap: 8px; }
.logo-mark { color: var(--accent); font-size: 18px; }
.logo-text { font-weight: 700; font-size: 16px; color: var(--navy); letter-spacing: 0.3px; }
.tagline { font-size: 11px; color: var(--grey); margin-top: 2px; }

.main { padding: 14px 16px; flex: 1; }

.section { margin-bottom: 14px; }

.label {
  display: block;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
  font-size: 12px;
}
.mini-label { font-size: 11px; color: var(--grey); }

.input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 12px;
  font-family: inherit;
  background: var(--card);
  color: var(--ink);
  transition: border-color 0.15s;
}
.input:focus { outline: none; border-color: var(--accent); }
.textarea { resize: vertical; }
.mono { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 11px; }

.hint { font-size: 10px; color: var(--grey); margin: 4px 0 0; }
.hint code { background: var(--bg); padding: 1px 4px; border-radius: 3px; }

.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.color {
  width: 28px; height: 28px; border: 1px solid var(--line);
  border-radius: 4px; padding: 0; cursor: pointer; background: none;
}

.btn {
  width: 100%;
  padding: 10px 14px;
  border-radius: 6px;
  border: none;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: transform 0.05s, background 0.15s;
}
.btn-primary { background: var(--navy); color: white; }
.btn-primary:hover { background: #274a76; }
.btn-primary:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.status {
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: 4px;
  font-size: 11px;
  min-height: 16px;
  display: none;
}
.status.ok { display: block; background: #E8F3EE; color: var(--pos); }
.status.err { display: block; background: #FBEDE4; color: var(--accent); }
.status.info { display: block; background: #EEF0F5; color: var(--navy); }

.divider { height: 1px; background: var(--line); margin: 16px 0; }

.advanced summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--navy);
  font-weight: 600;
  padding: 4px 0;
}
.advanced p { font-size: 11px; color: var(--grey); margin: 6px 0; }

.footer {
  display: flex; justify-content: space-between;
  padding: 8px 16px;
  font-size: 10px;
  color: var(--grey);
  border-top: 1px solid var(--line);
  background: var(--card);
}
.muted { opacity: 0.7; }