:root {
  --sky-top: #b3e5fc;
  --sky-mid: #81d4fa;
  --bg-page: #e3f2fd;
  --cream: #fafdf7;
  --cream-tint: #f2f4d9;
  --bg-card: #fafdf7;
  --bg-elevated: #ffffff;
  --bg-sidebar: rgba(255, 255, 255, 0.92);
  --bg-input: #ffffff;
  --border: rgba(62, 47, 39, 0.14);
  --border-outline: #79747e;
  --text: #3e2f27;
  --text-muted: #6d5e53;
  --md-primary: #6750a4;
  --md-primary-hover: #7965af;
  --md-on-primary: #ffffff;
  --md-primary-container: #eaddff;
  --md-on-primary-container: #21005d;
  --accent: var(--md-primary);
  --accent-hover: #9575cd;
  --accent-deep: #4f378b;
  --gold: #ffc107;
  --success: #2e7d32;
  --error: #c62828;
  --warning: #ef6c00;
  --radius: 12px;
  --radius-pill: 20px;
  --shadow: 0 4px 20px rgba(62, 47, 39, 0.08);
  --shadow-sidebar: 4px 0 24px rgba(41, 98, 150, 0.12);
  --elevation-1: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15);
  --elevation-2: 0 1px 2px rgba(0,0,0,0.3), 0 2px 6px 2px rgba(0,0,0,0.15);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Nunito", -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--bg-page) 38%, var(--bg-page) 100%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
}

a { color: var(--md-primary); text-decoration: none; font-weight: 700; }
a:hover { color: var(--md-primary-hover); }

/* ── Sidebar ─────────────────────────────────────────────────────────── */

.sidebar {
  width: 240px;
  min-height: 100vh;
  background: var(--bg-sidebar);
  backdrop-filter: blur(10px);
  border-right: 1px solid var(--border);
  box-shadow: var(--shadow-sidebar);
  padding: 24px 14px;
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0; top: 0; bottom: 0;
  z-index: 10;
}

.sidebar-brand {
  display: block;
  margin-bottom: 20px;
  text-decoration: none;
  align-self: flex-start;
}

.logo-pill {
  display: inline-block;
  padding: 10px 18px 10px 14px;
  background: rgba(255,255,255,0.45);
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.brand-logo {
  height: 38px;
  width: auto;
  display: block;
  object-fit: contain;
}

.sidebar-label {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 14px;
  margin: 16px 0 6px;
}

.sidebar-nav { flex: 1; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 13px;
  transition: all 0.15s;
  margin-bottom: 2px;
  border: 1px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: rgba(103,80,164,0.25);
}

.sidebar-user {
  border-top: 1px solid var(--border);
  padding-top: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.sidebar-user img { width: 28px; height: 28px; border-radius: 50%; }

/* ── Main ────────────────────────────────────────────────────────────── */

.main {
  flex: 1;
  margin-left: 240px;
  padding: 28px 36px;
  min-height: 100vh;
}

h1 { font-size: 26px; font-weight: 800; margin-bottom: 20px; letter-spacing: -0.02em; }
h2 { font-size: 18px; font-weight: 800; margin-bottom: 14px; }
h3 { font-size: 15px; font-weight: 800; margin-bottom: 10px; }

/* ── KPI Cards ───────────────────────────────────────────────────────── */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

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

.kpi-card .kpi-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.kpi-card .kpi-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}

.kpi-card .kpi-sub {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 4px;
}

/* ── Chart container ─────────────────────────────────────────────────── */

.chart-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

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

.chart-box h3 { margin-bottom: 12px; }

.chart-box canvas {
  width: 100% !important;
  max-height: 280px;
}

.chart-full {
  grid-column: 1 / -1;
}

/* ── Data table ──────────────────────────────────────────────────────── */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  font-weight: 800;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
}

.data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.data-table tr:hover td {
  background: rgba(103,80,164,0.04);
}

.data-table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ── Buttons ─────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.btn-primary {
  background: var(--md-primary);
  color: var(--md-on-primary);
  border-radius: var(--radius-pill);
  box-shadow: var(--elevation-1);
}
.btn-primary:hover {
  background: var(--md-primary-hover);
  box-shadow: var(--elevation-2);
}

/* ── Flash ────────────────────────────────────────────────────────────── */

.flash {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 700;
}
.flash-success { background: rgba(46,125,50,0.1); border: 1px solid rgba(46,125,50,0.45); color: var(--success); }
.flash-error   { background: rgba(198,40,40,0.08); border: 1px solid rgba(198,40,40,0.4); color: var(--error); }

/* ── Login ────────────────────────────────────────────────────────────── */

.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  width: 100%;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--bg-page) 50%, #e1f5fe 100%);
}

.login-card { text-align: center; padding: 48px 40px; max-width: 420px; }
.login-subtitle {
  color: var(--text-muted);
  margin-top: 16px;
  margin-bottom: 28px;
  font-weight: 800;
  font-size: 16px;
}

.btn-google {
  background: var(--md-primary);
  color: var(--md-on-primary);
  padding: 14px 28px;
  font-size: 15px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  box-shadow: var(--elevation-1);
  font-family: inherit;
  width: 100%;
  justify-content: center;
}
.btn-google:hover {
  background: var(--md-primary-hover);
  color: #fff;
  box-shadow: var(--elevation-2);
}

/* ── Responsive ──────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .chart-row { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .sidebar { width: 200px; padding: 16px 10px; }
  .main { margin-left: 200px; padding: 20px 16px; }
  .kpi-grid { grid-template-columns: 1fr; }
}