:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #687385;
  --border: #dfe5ef;
  --primary: #2457d6;
  --primary-dark: #1d46ad;
  --danger: #b42318;
  --danger-bg: #fff1f0;
  --success: #067647;
  --success-bg: #ecfdf3;
  --warning: #b54708;
  --warning-bg: #fffaeb;
  --info: #175cd3;
  --info-bg: #eff8ff;
  --shadow: 0 16px 40px rgba(17, 24, 39, .08);
  --radius: 18px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar nav { display: flex; gap: .75rem; flex-wrap: wrap; }
.topbar nav a { color: var(--text); font-weight: 600; }

.container { width: min(1180px, calc(100% - 2rem)); margin: 2rem auto; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1rem, 2.5vw, 1.5rem);
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}
h1, h2 { margin: 0 0 .25rem; line-height: 1.15; }
h1 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h2 { font-size: 1.25rem; margin-bottom: .75rem; }
.muted { color: var(--muted); font-size: .95rem; }
.text-danger { color: var(--danger); font-size: .9rem; }
code { background: #eef2f8; padding: .1rem .35rem; border-radius: .35rem; }

.grid { display: grid; gap: 1rem; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

label { display: block; font-weight: 650; margin-bottom: 1rem; }
input, textarea, select {
  width: 100%;
  margin-top: .4rem;
  padding: .72rem .8rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  font: inherit;
}
textarea { resize: vertical; }
input:focus, textarea:focus, select:focus, .editor:focus {
  outline: 3px solid rgba(36, 87, 214, .18);
  border-color: var(--primary);
}
input:disabled, textarea:disabled, select:disabled { opacity: .65; background: #f4f6f9; }

.editor-toolbar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  padding: .6rem;
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: 14px 14px 0 0;
  background: #f8fafc;
}
.editor-toolbar button, .editor-toolbar select {
  width: auto;
  margin: 0;
  padding: .45rem .65rem;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}
.editor {
  min-height: 260px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 0 0 14px 14px;
  background: #fff;
}
.editor[contenteditable="false"] { background: #f4f6f9; }

.checkbox-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.checkbox-card {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fbfcff;
  margin: 0;
}
.checkbox-card input { width: auto; margin: 0; transform: scale(1.15); }
.muted-block { opacity: .72; }

.button-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.align-end { align-items: flex-end; justify-content: flex-end; height: 100%; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: .72rem 1rem;
  border-radius: 12px;
  font-weight: 700;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
}
.button:hover { text-decoration: none; border-color: #c2cad8; }
.button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.button.primary:hover { background: var(--primary-dark); }
.button.danger-soft { background: var(--danger-bg); border-color: #fecaca; color: var(--danger); }
.button.small { padding: .45rem .65rem; border-radius: 9px; font-size: .9rem; }
.actions-card { position: sticky; bottom: 1rem; z-index: 10; }

.alert {
  border-radius: 14px;
  padding: .9rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  white-space: normal;
}
.alert-error { background: var(--danger-bg); border-color: #fecaca; color: var(--danger); }
.alert-success { background: var(--success-bg); border-color: #abefc6; color: var(--success); }
.alert-warning { background: var(--warning-bg); border-color: #fedf89; color: var(--warning); }

.badge, .pill {
  display: inline-flex;
  align-items: center;
  padding: .25rem .55rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 800;
  white-space: nowrap;
}
.badge-neutral, .pill { background: #eef2f8; color: #344054; }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .85rem .75rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .02em; }
.table-actions { display: flex; gap: .4rem; flex-wrap: wrap; }
.table-actions form { margin: 0; }

.login-page { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.login-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: var(--shadow);
}
.login-card .button { width: 100%; }

@media (max-width: 820px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .grid.two, .grid.three, .checkbox-grid { grid-template-columns: 1fr; }
  .card-header { flex-direction: column; }
  .actions-card { position: static; }
}

.html-source {
  min-height: 340px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: .95rem;
  line-height: 1.5;
  resize: vertical;
}
.is-hidden { display: none !important; }