/* ------------------------------------------------------------------
 * Beacon — design system
 * Slate + indigo, conservative corporate, 8pt spacing scale.
 * ------------------------------------------------------------------ */

:root {
  /* Palette */
  --bg:        #f1f5f9;   /* slate-100 */
  --surface:   #ffffff;
  --surface-2: #f8fafc;   /* slate-50 */
  --border:    #e2e8f0;   /* slate-200 */
  --border-strong: #cbd5e1; /* slate-300 */
  --fg:        #0f172a;   /* slate-900 */
  --fg-2:      #334155;   /* slate-700 */
  --muted:     #64748b;   /* slate-500 */

  --primary:        #2563eb;   /* indigo-600 */
  --primary-hover:  #1d4ed8;   /* indigo-700 */
  --primary-soft:   #eff6ff;   /* indigo-50 */
  --danger:         #dc2626;   /* red-600 */
  --danger-hover:   #b91c1c;
  --ok:             #059669;   /* emerald-600 */
  --ok-soft:        #ecfdf5;
  --warn:           #d97706;

  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Radii, shadow, spacing */
  --r-sm: 4px;
  --r:    6px;
  --r-md: 8px;
  --r-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 1px rgba(15, 23, 42, .03);
  --shadow:    0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .07), 0 2px 4px -2px rgba(15, 23, 42, .04);

  --focus-ring: 0 0 0 3px rgba(37, 99, 235, .25);
}

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

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, samp { font-family: var(--font-mono); font-size: .9em; }

h1, h2, h3, h4 { margin: 0 0 .4em; font-weight: 600; letter-spacing: -0.011em; color: var(--fg); }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1rem; text-transform: uppercase; letter-spacing: .04em; color: var(--fg-2); }
p  { margin: 0 0 .6em; }

/* ------------------------------------------------------------------
 * Layout
 * ------------------------------------------------------------------ */
.container { max-width: 1120px; margin: 32px auto; padding: 0 24px; }
.container.narrow { max-width: 440px; }

main > h1:first-child { margin-bottom: 24px; }

/* ------------------------------------------------------------------
 * Top navigation
 * ------------------------------------------------------------------ */
.topnav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 24px;
  padding: 12px 28px;
  box-shadow: var(--shadow-sm);
}
.topnav .brand {
  font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em;
  color: var(--fg);
  display: flex; align-items: center; gap: 8px;
}
.topnav .brand::before {
  content: '';
  display: inline-block; width: 18px; height: 18px; border-radius: 5px;
  background: linear-gradient(135deg, var(--primary) 0%, #0ea5e9 100%);
}
.topnav a {
  color: var(--fg-2); text-decoration: none;
  padding: 6px 4px; border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
  font-weight: 500;
}
.topnav a:hover { color: var(--fg); border-bottom-color: var(--border-strong); }
.topnav a.active { color: var(--primary); border-bottom-color: var(--primary); }
.topnav .brand { border: none; }
.topnav .brand:hover { color: var(--fg); }
.topnav .inline-form { margin-left: auto; }
.link-btn {
  background: none; border: 1px solid transparent;
  color: var(--muted); cursor: pointer; padding: 6px 10px;
  border-radius: var(--r); font: inherit;
  transition: background .15s, color .15s;
}
.link-btn:hover { color: var(--fg); background: var(--surface-2); }

/* ------------------------------------------------------------------
 * Cards
 * ------------------------------------------------------------------ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.card h3 { margin-top: 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.cards .card { margin-bottom: 0; }

/* ------------------------------------------------------------------
 * Forms
 * ------------------------------------------------------------------ */
form.stack { display: flex; flex-direction: column; gap: 14px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }

label { display: flex; flex-direction: column; gap: 4px;
  font-size: 12.5px; color: var(--fg-2); font-weight: 500; }
label.checkbox { flex-direction: row; align-items: center; gap: 8px; font-weight: 400; color: var(--fg); }

input, select, textarea {
  font: inherit;
  font-size: 14px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--surface);
  color: var(--fg);
  transition: border-color .12s, box-shadow .12s;
  min-height: 36px;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}
input[type=color] { padding: 2px; height: 36px; width: 56px; cursor: pointer; }
input[type=checkbox], input[type=radio] { min-height: 0; cursor: pointer; }
input[type=file] { padding: 6px; background: var(--surface-2); cursor: pointer; }
input::placeholder { color: var(--muted); }

button, .button {
  font: inherit; font-weight: 500;
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 36px;
  transition: background .12s, border-color .12s, box-shadow .12s, color .12s;
}
button:hover, .button:hover { background: var(--surface-2); border-color: var(--muted); text-decoration: none; }
button:focus-visible, .button:focus-visible { outline: none; box-shadow: var(--focus-ring); }
button:active, .button:active { transform: translateY(1px); }

button.primary, .button.primary {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
button.primary:hover, .button.primary:hover {
  background: var(--primary-hover); border-color: var(--primary-hover); color: #fff;
}
button.danger, .button.danger {
  background: #fff; color: var(--danger); border-color: var(--border-strong);
}
button.danger:hover, .button.danger:hover {
  background: var(--danger); color: #fff; border-color: var(--danger);
}

/* ------------------------------------------------------------------
 * Tables
 * ------------------------------------------------------------------ */
table.grid {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  font-size: 13.5px;
}
table.grid th, table.grid td {
  text-align: left; padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table.grid thead th {
  font-weight: 600; font-size: 12px;
  text-transform: uppercase; letter-spacing: .04em;
  color: var(--muted);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-strong);
}
table.grid tbody tr:last-child td { border-bottom: none; }
table.grid tbody tr:hover { background: var(--surface-2); }

/* ------------------------------------------------------------------
 * Status pills, alerts, utility classes
 * ------------------------------------------------------------------ */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px; font-weight: 600;
  background: var(--surface-2); color: var(--fg-2);
  border: 1px solid var(--border);
}
.pill::before {
  content: ''; width: 7px; height: 7px; border-radius: 50%;
  background: var(--muted);
}
.pill.ok { background: var(--ok-soft); color: var(--ok); border-color: rgba(5, 150, 105, .2); }
.pill.ok::before { background: var(--ok); box-shadow: 0 0 0 3px rgba(5, 150, 105, .15); }
.pill.fail { background: #fef2f2; color: var(--danger); border-color: rgba(220, 38, 38, .2); }
.pill.fail::before { background: var(--danger); box-shadow: 0 0 0 3px rgba(220, 38, 38, .15); }

.muted    { color: var(--muted); }
.ok       { color: var(--ok); font-weight: 600; }
.fail     { color: var(--danger); font-weight: 600; }
.mono     { font-family: var(--font-mono); }

.alert { padding: 12px 14px; border-radius: var(--r-md); margin-bottom: 16px;
  font-size: 13.5px; border: 1px solid transparent; }
.alert.error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert.ok    { background: var(--ok-soft); border-color: #a7f3d0; color: #065f46; }

.inline-form { display: inline-flex; gap: 6px; align-items: center; }

/* Login layout */
.container.narrow { margin-top: 80px; }
.container.narrow .card { padding: 28px 32px; }
.container.narrow h1 {
  text-align: center; margin-bottom: 24px;
  font-size: 1.4rem;
}

/* Progress bar */
progress {
  width: 100%; height: 10px;
  border: none; border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}
progress::-webkit-progress-bar { background: var(--surface-2); border-radius: 999px; }
progress::-webkit-progress-value { background: var(--primary); border-radius: 999px; transition: width .15s; }
progress::-moz-progress-bar { background: var(--primary); }