/* Program 1 — Ads Reporting Dashboard
   Design tokens first, components after. No build step, no CDN. */

:root {
  --bg:        #f4f6fb;
  --surface:   #ffffff;
  --surface-2: #f8fafc;
  --border:    #e3e8f0;
  --text:      #0f172a;
  --text-dim:  #64748b;
  --text-mute: #94a3b8;

  --sidebar-bg:     #0f172a;
  --sidebar-text:   #94a3b8;
  --sidebar-active: #1e293b;
  --sidebar-hover:  #172033;

  --accent:      #4f46e5;
  --accent-soft: #eef2ff;
  --accent-text: #ffffff;

  --ok:    #059669;
  --ok-bg: #ecfdf5;
  --warn:  #d97706;
  --warn-bg:#fffbeb;
  --bad:   #dc2626;
  --bad-bg:#fef2f2;

  --radius:    12px;
  --radius-sm: 8px;
  --shadow:    0 1px 2px rgba(15,23,42,.06), 0 4px 12px rgba(15,23,42,.05);
  --shadow-lg: 0 8px 28px rgba(15,23,42,.12);

  --sidebar-w: 268px;
}

[data-theme="dark"] {
  --bg:        #0b1120;
  --surface:   #131c31;
  --surface-2: #0f1728;
  --border:    #23304d;
  --text:      #e2e8f0;
  --text-dim:  #94a3b8;
  --text-mute: #64748b;
  --sidebar-bg:     #080d18;
  --sidebar-active: #18233b;
  --sidebar-hover:  #121a2c;
  --accent-soft: #1e1b4b;
  --ok-bg:  #052e23;
  --warn-bg:#2d1e05;
  --bad-bg: #2f1111;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 12px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

/* ------------------------------------------------------------------ layout */

.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex; align-items: center; gap: 11px;
  padding: 20px 20px 18px;
  color: #fff; font-weight: 650; font-size: 15px;
  letter-spacing: -.01em;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: grid; place-items: center;
  font-size: 15px; flex-shrink: 0;
}
.brand-sub { font-size: 11px; color: #64748b; font-weight: 500; display: block; }

.nav { padding: 12px 10px; flex: 1; }
.nav-group { margin-bottom: 4px; }

.nav-group-btn {
  width: 100%; display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  background: transparent; border: 0; cursor: pointer;
  color: #cbd5e1; font-size: 13.5px; font-weight: 560;
  font-family: inherit; text-align: left;
  transition: background .13s ease;
}
.nav-group-btn:hover { background: var(--sidebar-hover); color: #fff; }
.nav-group-btn .chev {
  margin-left: auto; transition: transform .18s ease; opacity: .55; flex-shrink: 0;
}
.nav-group.open .nav-group-btn .chev { transform: rotate(90deg); }
.nav-group.open .nav-group-btn { color: #fff; }

.nav-children {
  display: none; margin: 2px 0 6px;
  padding-left: 14px; border-left: 1px solid rgba(255,255,255,.08);
  margin-left: 21px;
}
.nav-group.open .nav-children { display: block; }

.nav-link {
  display: block; padding: 8px 12px; margin: 1px 0;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text); font-size: 13px; font-weight: 500;
  transition: background .13s ease, color .13s ease;
}
.nav-link:hover { background: var(--sidebar-hover); color: #e2e8f0; text-decoration: none; }
.nav-link.active { background: var(--accent); color: #fff; font-weight: 560; }

.sidebar-foot {
  padding: 14px; border-top: 1px solid rgba(255,255,255,.07);
  display: flex; align-items: center; gap: 10px;
}
.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg,#6366f1,#a855f7);
  display: grid; place-items: center; color: #fff;
  font-weight: 650; font-size: 13px; flex-shrink: 0;
}
.who { min-width: 0; flex: 1; }
.who b { color: #e2e8f0; font-size: 13px; display: block;
         white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.who span { font-size: 11px; color: #64748b; text-transform: capitalize; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  height: 62px; background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px; position: sticky; top: 0; z-index: 20;
}
.topbar h1 { font-size: 16px; font-weight: 640; margin: 0; letter-spacing: -.01em; }
.topbar .spacer { flex: 1; }

.content { padding: 24px; flex: 1; max-width: 1500px; width: 100%; }

.icon-btn {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-dim); cursor: pointer;
  display: grid; place-items: center; font-size: 15px;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

#menuToggle { display: none; }

/* ------------------------------------------------------------------- cards */

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  margin-bottom: 18px; overflow: hidden;
}
.card-head {
  padding: 15px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.card-head h2 { margin: 0; font-size: 14px; font-weight: 620; letter-spacing: -.01em; }
.card-head .spacer { flex: 1; }
.card-body { padding: 18px; }
.card-body.tight { padding: 0; }

.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.stat { padding: 17px 18px; }
.stat .label {
  font-size: 11.5px; color: var(--text-dim); font-weight: 560;
  text-transform: uppercase; letter-spacing: .04em; margin-bottom: 7px;
}
.stat .value { font-size: 25px; font-weight: 680; letter-spacing: -.025em; line-height: 1.15; }
.stat .sub { font-size: 12px; color: var(--text-mute); margin-top: 5px; }

/* ------------------------------------------------------------------ tables */

.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th {
  text-align: left; padding: 10px 14px;
  background: var(--surface-2); color: var(--text-dim);
  font-weight: 600; font-size: 11.5px;
  text-transform: uppercase; letter-spacing: .04em;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
table.data td { padding: 11px 14px; border-bottom: 1px solid var(--border); }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: var(--surface-2); }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data tfoot td {
  font-weight: 650; background: var(--surface-2);
  border-top: 2px solid var(--border);
}

.empty { padding: 44px 20px; text-align: center; color: var(--text-mute); }
.empty .big { font-size: 30px; margin-bottom: 10px; opacity: .45; }

/* ------------------------------------------------------------------- forms */

.field { margin-bottom: 14px; }
.field label {
  display: block; font-size: 12.5px; font-weight: 570;
  margin-bottom: 6px; color: var(--text);
}
.field .hint { font-size: 11.5px; color: var(--text-mute); margin-top: 5px; }

input[type=text], input[type=password], input[type=number], input[type=date],
input[type=email], select, textarea {
  width: 100%; padding: 9px 11px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text);
  font-size: 13.5px; font-family: inherit;
  transition: border-color .13s ease, box-shadow .13s ease;
}
input:focus, select:focus, textarea:focus {
  outline: 0; border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
input[readonly] { background: var(--surface-2); color: var(--text-dim); }

/* Digits line up column-to-column while typing. */
input[data-format] { font-variant-numeric: tabular-nums; }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 15px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-size: 13px; font-weight: 560;
  font-family: inherit; cursor: pointer; white-space: nowrap;
  transition: background .13s ease, border-color .13s ease;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: #4338ca; border-color: #4338ca; }
.btn-danger { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 35%, var(--border)); }
.btn-danger:hover { background: var(--bad-bg); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > .field { flex: 1; min-width: 150px; margin-bottom: 0; }

/* ------------------------------------------------------------------ badges */

.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 580; letter-spacing: .01em;
}
.badge-ok   { background: var(--ok-bg);   color: var(--ok); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-bad  { background: var(--bad-bg);  color: var(--bad); }
.badge-mute { background: var(--surface-2); color: var(--text-dim); }
.badge-accent { background: var(--accent-soft); color: var(--accent); }

.pos { color: var(--ok); font-weight: 600; }
.neg { color: var(--bad); font-weight: 600; }

.alert {
  padding: 11px 15px; border-radius: var(--radius-sm);
  margin-bottom: 16px; font-size: 13px; border: 1px solid transparent;
}
.alert-ok   { background: var(--ok-bg);   color: var(--ok);   border-color: color-mix(in srgb, var(--ok) 25%, transparent); }
.alert-bad  { background: var(--bad-bg);  color: var(--bad);  border-color: color-mix(in srgb, var(--bad) 25%, transparent); }
.alert-warn { background: var(--warn-bg); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 25%, transparent); }

/* ------------------------------------------------------------------- misc */

.chart-box { position: relative; height: 320px; }
.seg { display: inline-flex; background: var(--surface-2); border-radius: var(--radius-sm); padding: 3px; gap: 2px; }
.seg button {
  padding: 5px 12px; border: 0; background: transparent; cursor: pointer;
  border-radius: 6px; font-size: 12px; font-weight: 560;
  color: var(--text-dim); font-family: inherit;
}
.seg button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

pre.export {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px; line-height: 1.75; white-space: pre-wrap;
  margin: 0; color: var(--text);
}

.perm-table input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }

/* -------------------------------------------------------------------- auth */

.auth-wrap {
  min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background: radial-gradient(1100px 500px at 50% -10%, #1e293b 0%, #0b1120 62%);
}
.auth-card {
  width: 100%; max-width: 396px; background: var(--surface);
  border-radius: 16px; box-shadow: var(--shadow-lg); padding: 34px 30px;
  border: 1px solid var(--border);
}
.auth-card h1 { margin: 0 0 6px; font-size: 20px; font-weight: 680; letter-spacing: -.02em; }
.auth-card .lede { color: var(--text-dim); font-size: 13px; margin-bottom: 24px; }
.auth-mark {
  width: 46px; height: 46px; border-radius: 13px; margin-bottom: 17px;
  background: linear-gradient(135deg,#6366f1,#8b5cf6);
  display: grid; place-items: center; font-size: 21px;
}

/* ------------------------------------------------------------- responsive */

@media (max-width: 1100px) { .grid.cols-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 900px) {
  .sidebar {
    position: fixed; z-index: 60; left: 0; top: 0;
    transform: translateX(-100%); transition: transform .22s ease;
  }
  body.nav-open .sidebar { transform: translateX(0); box-shadow: var(--shadow-lg); }
  body.nav-open::after {
    content: ''; position: fixed; inset: 0; background: rgba(2,6,23,.5); z-index: 50;
  }
  #menuToggle { display: grid; }
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .content { padding: 16px; }
}
@media (max-width: 560px) {
  .grid.cols-4 { grid-template-columns: 1fr; }
  .topbar { padding: 0 14px; }
}

@media print {
  .sidebar, .topbar, .btn, .seg { display: none !important; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}