:root {
  --bg: #f4f5f9;
  --surface: #ffffff;
  --surface-2: #f0f1f6;
  --border: #e3e5ee;
  --text: #1a1a2e;
  --text-muted: #6b6f85;
  --accent: #4c1d95;
  --accent-2: #0f766e;
  --good: #15803d;
  --bad: #b91c1c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 20, 40, 0.04), 0 4px 16px rgba(20, 20, 40, 0.05);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14141f;
    --surface: #1c1c2b;
    --surface-2: #23233635;
    --surface-2: #232336;
    --border: #33334a;
    --text: #ecebf5;
    --text-muted: #9a9ab0;
    --good: #4ade80;
    --bad: #f87171;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 20px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
}

a { color: inherit; }

/* ---------- Header ---------- */

.app-header {
  padding: 28px clamp(16px, 4vw, 48px) 0;
  max-width: 1280px;
  margin: 0 auto;
}

.app-header h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}

.app-header p.subtitle {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.sync-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  padding: 8px 12px;
  margin-bottom: 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.sync-bar-right { display: flex; align-items: center; gap: 8px; }
.sync-bar-right input { width: 130px; padding: 6px 8px; font-size: 0.8rem; }

.tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 10px 10px 0 0;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transform: translateY(1px);
}

.tab-btn:hover { color: var(--text); background: var(--surface-2); }

.tab-btn.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  background: var(--surface);
}

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 48px) 80px;
}

.view { display: none; }
.view.active { display: block; }

/* ---------- Cards / grid ---------- */

.grid {
  display: grid;
  gap: 16px;
}

.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

@media (max-width: 1000px) {
  .grid.cols-4, .grid.cols-5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4, .grid.cols-5 { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}

.section-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 32px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title:first-child { margin-top: 0; }

.section-title .badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
}

/* ---------- Account overview cards ---------- */

.account-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px 20px;
  border-top: 4px solid var(--accent-c, var(--accent));
  cursor: pointer;
  transition: transform 0.12s ease;
}
.account-card:hover { transform: translateY(-2px); }

.account-card .brand-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 2px;
}

.account-card .brand-name { font-weight: 700; font-size: 1rem; }
.account-card .platform-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-c, var(--accent));
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.account-card .month-note { color: var(--text-muted); font-size: 0.78rem; margin-bottom: 14px; }

.kpi-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

.kpi-mini { }
.kpi-mini .label { font-size: 0.72rem; color: var(--text-muted); }
.kpi-mini .value { font-size: 1.15rem; font-weight: 700; }
.kpi-mini .delta { font-size: 0.72rem; font-weight: 600; margin-left: 4px; }
.delta.up { color: var(--good); }
.delta.down { color: var(--bad); }
.delta.flat { color: var(--text-muted); }

/* ---------- KPI big cards (detail page) ---------- */

.kpi-card { text-align: left; }
.kpi-card .label { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 6px; }
.kpi-card .value { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.01em; }
.kpi-card .delta { display: inline-flex; align-items: center; gap: 3px; font-size: 0.8rem; font-weight: 700; margin-left: 8px; }

/* ---------- Account detail header ---------- */

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.detail-header .titles h2 { margin: 0; font-size: 1.4rem; }
.detail-header .titles .platform { color: var(--accent-c, var(--accent)); font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.03em; }

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.small { padding: 5px 10px; font-size: 0.76rem; }
.btn.danger { color: var(--bad); }

/* ---------- Charts ---------- */

.chart-card svg { width: 100%; height: auto; display: block; }
.chart-card .chart-title { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 600; }
.chart-card .chart-latest { font-size: 1.3rem; font-weight: 800; margin-bottom: 2px; }

.chart-line { fill: none; stroke-width: 2.5; }
.chart-dot { }
.chart-grid-line { stroke: var(--border); stroke-width: 1; }
.chart-axis-label { fill: var(--text-muted); font-size: 9px; font-family: inherit; }

/* ---------- Top content cards ---------- */

.content-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  position: relative;
}
.content-card .rank {
  position: absolute;
  top: -10px; left: -10px;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--accent-c, var(--accent));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.content-card .caption { font-weight: 600; font-size: 0.92rem; margin: 6px 0 10px; min-height: 40px; }
.content-card .stat-row { display: flex; justify-content: space-between; font-size: 0.82rem; padding: 3px 0; border-top: 1px dashed var(--border); }
.content-card .stat-row:first-of-type { border-top: none; }
.content-card .stat-row .v { font-weight: 700; }

/* ---------- Lists ---------- */

.insight-list { margin: 0; padding-left: 18px; color: var(--text); font-size: 0.9rem; line-height: 1.55; }
.insight-list li { margin-bottom: 6px; }

/* ---------- Tables ---------- */

table.data-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.data-table th, table.data-table td { padding: 9px 12px; text-align: right; border-bottom: 1px solid var(--border); }
table.data-table th:first-child, table.data-table td:first-child { text-align: left; }
table.data-table thead th { color: var(--text-muted); font-weight: 600; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.02em; background: var(--surface-2); }
table.data-table tbody tr:hover { background: var(--surface-2); }

/* ---------- Audience ---------- */

.audience-flex { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-start; }
.donut-wrap { display: flex; align-items: center; gap: 16px; }
.donut-legend { font-size: 0.85rem; }
.donut-legend .row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.donut-legend .swatch { width: 10px; height: 10px; border-radius: 3px; }

.city-bar-row { display: grid; grid-template-columns: 160px 1fr 48px; align-items: center; gap: 8px; font-size: 0.8rem; margin-bottom: 6px; }
.city-bar-track { background: var(--surface-2); border-radius: 6px; height: 10px; overflow: hidden; }
.city-bar-fill { background: var(--accent-c, var(--accent)); height: 100%; border-radius: 6px; }

/* ---------- Forms ---------- */

.form-card { max-width: 640px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.form-row.single { grid-template-columns: 1fr; }
label.field-label { display: block; font-size: 0.8rem; font-weight: 600; margin-bottom: 5px; color: var(--text-muted); }
input, select {
  width: 100%;
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.form-actions { display: flex; gap: 10px; margin-top: 4px; flex-wrap: wrap; }

.toast {
  position: fixed;
  bottom: 20px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  transition: all 0.25s ease;
  pointer-events: none;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Action plan ---------- */

.action-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
}
.action-item:last-child { border-bottom: none; }
.action-item input[type=checkbox] { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--accent-c, var(--accent)); }
.action-item .text { flex: 1; font-size: 0.9rem; }
.action-item.done .text { text-decoration: line-through; color: var(--text-muted); }
.action-progress { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px; }

.add-action-row { display: flex; gap: 8px; margin-top: 12px; }
.add-action-row input { flex: 1; }

/* ---------- Report gallery ---------- */

.report-thumb {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  background: var(--surface);
}
.report-thumb img { width: 100%; display: block; }
.report-thumb .cap { font-size: 0.72rem; padding: 6px 8px; color: var(--text-muted); }

.lightbox {
  position: fixed; inset: 0;
  background: rgba(10, 10, 20, 0.82);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 30px;
}
.lightbox.show { display: flex; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 10px; box-shadow: 0 10px 40px rgba(0,0,0,0.5); }
.lightbox .close-x {
  position: absolute; top: 20px; right: 24px;
  color: #fff; font-size: 1.6rem; cursor: pointer;
  background: rgba(255,255,255,0.12); border-radius: 50%;
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
}

.muted { color: var(--text-muted); }
.note { font-size: 0.76rem; color: var(--text-muted); margin-top: 4px; }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

footer.app-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 20px;
}