:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-contrast: #ffffff;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --success: #166534;
  --success-bg: #f0fdf4;
  --radius: 10px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --text: #e8eaed;
    --muted: #9aa0ab;
    --border: #2a2f3a;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-contrast: #0f1115;
    --danger: #fca5a5;
    --danger-bg: #2a1515;
    --success: #86efac;
    --success-bg: #11241a;
    --shadow: none;
  }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
code { font: 0.85em ui-monospace, SFMono-Regular, Menlo, monospace; }
h1 { font-size: 1.5rem; line-height: 1.2; margin: 0; }
h2 { font-size: 1rem; margin: 2rem 0 0.75rem; }
.muted { color: var(--muted); }

.container { max-width: 960px; margin: 0 auto; padding: 0 1.25rem; }
main.container { padding-top: 1.75rem; padding-bottom: 4rem; }

/* Top bar */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-inner { display: flex; align-items: center; gap: 2rem; height: 56px; }
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); letter-spacing: -0.01em; }
.brand:hover { color: var(--text); text-decoration: none; }
.nav { display: flex; gap: 0.25rem; }
.nav-link { padding: 0.4rem 0.75rem; border-radius: 8px; color: var(--muted); font-weight: 500; }
.nav-link:hover { color: var(--text); background: var(--bg); text-decoration: none; }
.nav-link.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

/* Page header */
.page-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.page-header .subtitle { color: var(--muted); margin: 0.15rem 0 0; }
.actions { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.actions form { margin: 0; }

/* Buttons */
.btn, button, input[type="submit"] {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 0.9rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font: inherit; font-weight: 500; cursor: pointer; box-shadow: var(--shadow);
}
.btn:hover, button:hover, input[type="submit"]:hover { border-color: var(--muted); text-decoration: none; color: var(--text); }
.btn-primary, input[type="submit"] { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover, input[type="submit"]:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-contrast); }
.btn-danger { color: var(--danger); }
.btn-danger:hover { border-color: var(--danger); color: var(--danger); }

/* Cards, tables */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.card-body { padding: 1.25rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.7rem 1rem; border-bottom: 1px solid var(--border); }
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }
td.num, th.num { text-align: right; }

.empty { padding: 2.5rem 1rem; text-align: center; color: var(--muted); }

/* Detail lists */
.details { display: grid; grid-template-columns: 11rem 1fr; margin: 0; }
.details dt, .details dd { padding: 0.65rem 1.25rem; border-bottom: 1px solid var(--border); margin: 0; }
.details dt { color: var(--muted); }
.details dt:last-of-type, .details dt:last-of-type + dd { border-bottom: 0; }
.details.meta { background: color-mix(in srgb, var(--muted) 5%, transparent); font-size: 0.9rem; border-top: 1px solid var(--border); }

/* Forms */
.form { display: grid; gap: 1rem; grid-template-columns: repeat(2, 1fr); }
.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field.wide { grid-column: 1 / -1; }
.field label { font-weight: 500; font-size: 0.875rem; }
.field .hint { font-size: 0.8rem; color: var(--muted); }
input[type="text"], input[type="password"], input[type="email"], input[type="tel"], input[type="url"], input[type="number"], input[type="date"], select, textarea {
  width: 100%; padding: 0.55rem 0.7rem; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 0; border-color: var(--accent); }
.field.checkbox { flex-direction: row; align-items: center; gap: 0.5rem; align-self: end; padding-bottom: 0.5rem; }
.field.checkbox input { width: auto; }
.form-actions { grid-column: 1 / -1; display: flex; gap: 0.5rem; align-items: center; }

/* Flash */
.flash { padding: 0.75rem 1rem; border-radius: 8px; margin-bottom: 1.25rem; border: 1px solid; }
.flash ul { margin: 0.4rem 0 0; padding-left: 1.2rem; }
.flash-notice { color: var(--success); background: var(--success-bg); border-color: color-mix(in srgb, var(--success) 30%, transparent); }
.flash-alert { color: var(--danger); background: var(--danger-bg); border-color: color-mix(in srgb, var(--danger) 30%, transparent); }

/* Badges */
.badge { display: inline-block; padding: 0.1rem 0.6rem; border-radius: 999px; font-size: 0.78rem; font-weight: 600; background: color-mix(in srgb, var(--muted) 15%, transparent); color: var(--muted); }
.badge-sent, .badge-prospect { background: color-mix(in srgb, #3b82f6 16%, transparent); color: #2563eb; }
.badge-paid, .badge-customer { background: var(--success-bg); color: var(--success); }
.badge-cancelled, .badge-overdue { background: var(--danger-bg); color: var(--danger); }
.badge-inactive { opacity: 0.7; }
.badge-create { background: var(--success-bg); color: var(--success); }
.badge-update { background: color-mix(in srgb, #3b82f6 16%, transparent); color: #2563eb; }
.badge-destroy { background: var(--danger-bg); color: var(--danger); }
.badge-ok { background: var(--success-bg); color: var(--success); }
.badge-error { background: var(--danger-bg); color: var(--danger); }
pre { margin: 0; padding: 1rem 1.25rem; overflow-x: auto; white-space: pre-wrap; word-break: break-word; font-size: 0.85rem; }
code { font-size: 0.85rem; }
.small { font-size: 0.8rem; }
.nowrap { white-space: nowrap; }
.nav-end { margin-left: auto; }

/* History / change feed */
table.history td { vertical-align: top; font-size: 0.9rem; }
table.history .changes .change { display: block; }
table.history .changes .change + .change { margin-top: 0.15rem; }

/* Dashboard */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1rem; }
.stat { display: flex; flex-direction: column; gap: 0.15rem; padding: 1rem 1.25rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); color: var(--text); }
.stat:hover { text-decoration: none; border-color: var(--accent); color: var(--text); }
.stat-value { font-size: 1.75rem; font-weight: 700; line-height: 1.1; }
.stat-value.danger { color: var(--danger); }
.stat-label { color: var(--muted); font-size: 0.85rem; }
.live-dot { display: inline-block; width: 0.5rem; height: 0.5rem; margin-right: 0.25rem; border-radius: 50%; background: #22c55e; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }
@media (max-width: 640px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.prose { white-space: pre-line; }

@media (max-width: 640px) {
  .topbar-inner { gap: 1rem; }
  .form { grid-template-columns: 1fr; }
  .details { grid-template-columns: 1fr; }
  .details dt { border-bottom: 0; padding-bottom: 0; }
  table:not(.history) th:nth-child(n+4), table:not(.history) td:nth-child(n+4) { display: none; }
}

@media (prefers-color-scheme: dark) {
  .badge-sent, .badge-prospect, .badge-update { color: #93c5fd; }
}