/* ZeroFee Tools - JSON Diff Checker styles (no frameworks) */

:root {
  --bg: #f6f8fc;
  --card: #ffffff;
  --text: #1a2333;
  --muted: #5b6b85;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #e2e8f2;
  --success: #15803d;
  --error: #b91c1c;
  --radius: 12px;
  --shadow: 0 2px 10px rgba(20, 40, 90, 0.07);
  --add-bg: #dcfce7;
  --add-border: #86efac;
  --del-bg: #fee2e2;
  --del-border: #fca5a5;
  --chg-bg: #fef9c3;
  --chg-border: #fde047;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- header ---------- */
.site-header {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: #fff;
  padding: 36px 0 30px;
  text-align: center;
}
.brand { display: flex; align-items: center; justify-content: center; gap: 10px; }
.brand-icon { font-size: 2rem; }
.brand h1 { margin: 0; font-size: 2.2rem; letter-spacing: 0.5px; }
.tagline { margin: 8px 0 4px; font-size: 1.1rem; opacity: 0.95; }
.privacy-badge {
  display: inline-block;
  margin: 10px 0 0;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.92rem;
}

/* ---------- panels ---------- */
.tool-panel {
  display: none;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  margin: 18px 0 8px;
}
.tool-panel.active { display: block; }
.tool-panel h2 { margin-top: 0; }
.tool-panel h3 { margin: 22px 0 10px; font-size: 1.05rem; }
.how { color: var(--muted); }

/* ---------- editors ---------- */
.diff-editors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 6px 0;
}
.diff-editor {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  background: #fbfdff;
}
.diff-editor h3 { margin: 0 0 6px; font-size: 1rem; }
.diff-editor.drag { border-color: var(--primary); background: #eef4ff; }
.editor-btns { margin: 6px 0; gap: 6px; }
.editor-btns .btn-ghost { padding: 8px 14px; font-size: 0.88rem; }

.code-input {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.88rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
  resize: vertical;
  margin: 4px 0;
  line-height: 1.5;
}
.code-input:focus { outline: 2px solid var(--primary); border-color: var(--primary); }

/* ---------- buttons ---------- */
.btn-primary, .btn-secondary, .btn-ghost {
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-secondary { background: #eef2f9; color: var(--text); }
.btn-secondary:hover { background: #e0e8f7; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); border-color: #b9c6e2; }

.row { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; align-items: center; }

.quality-pick {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 14px 0;
  display: grid;
  gap: 8px;
}
.quality-pick legend { font-weight: 700; padding: 0 8px; }
.quality-pick label { display: flex; align-items: center; gap: 8px; }

/* ---------- status & error ---------- */
.status { margin: 12px 0 0; font-size: 0.95rem; min-height: 1.2em; }
.status.show.info { color: var(--muted); }
.status.show.success { color: var(--success); font-weight: 600; }
.status.show.error { color: var(--error); font-weight: 600; }

.diff-error {
  background: #fef2f2;
  border: 1px solid var(--del-border);
  color: #991b1b;
  border-radius: 10px;
  padding: 14px 16px;
  margin: 14px 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---------- results ---------- */
.diff-summary { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 12px; }
.chip {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
  border: 1px solid;
}
.chip-add { background: var(--add-bg); border-color: var(--add-border); color: #166534; }
.chip-del { background: var(--del-bg); border-color: var(--del-border); color: #991b1b; }
.chip-chg { background: var(--chg-bg); border-color: var(--chg-border); color: #854d0e; }

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 0 0 10px;
}
.diff-col { min-width: 0; }
.diff-col + .diff-col { border-left: 1px solid var(--border); }
.diff-head {
  background: #eef2f9;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.diff-lines {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
}
.dl { display: flex; white-space: pre; padding: 0 8px 0 0; min-height: 1.6em; }
.dl .ln {
  flex: 0 0 38px;
  text-align: right;
  padding-right: 10px;
  color: #94a3b8;
  user-select: none;
}
.dl code { white-space: pre; }
.dl-add { background: var(--add-bg); }
.dl-del { background: var(--del-bg); }
.dl-chg { background: var(--chg-bg); }

/* ---------- faq ---------- */
.faq {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  margin: 26px 0;
}
.faq h2 { margin-top: 0; }
.faq h3 { margin: 18px 0 4px; font-size: 1.02rem; }
.faq p { margin: 4px 0 0; color: var(--muted); }

.hidden { display: none !important; }

/* ---------- responsive ---------- */
@media (max-width: 700px) {
  .diff-editors { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .diff-col + .diff-col { border-left: none; border-top: 1px solid var(--border); }
  .tool-panel, .faq { padding: 18px 14px; }
  .brand h1 { font-size: 1.7rem; }
}