/* ============================================================================
   APEX — Premium Theme
   Inter font · generous spacing · refined hierarchy · low-chrome surfaces
   ============================================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Sidebar — deep blue */
  --sidebar-w: 230px;
  --sidebar-bg: #0c1e3e;
  --sidebar-fg: #93a8c8;
  --sidebar-fg-strong: #e0ecff;
  --sidebar-active-bg: #15326b;
  --sidebar-active-fg: #ffffff;
  --sidebar-accent: #3b82f6;
  --sidebar-border: #1a2f5c;

  /* Surface */
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --border: #e8edf3;
  --border-strong: #dde4ee;

  /* Text */
  --text-1: #0f172a;
  --text-2: #475569;
  --text-3: #94a3b8;
  --text-4: #cbd5e1;

  /* Accent — blue */
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff6ff;

  /* States */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* Radii & motion */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-2: 0 4px 16px rgba(15, 23, 42, 0.06);
  --transition: 160ms cubic-bezier(0.4, 0, 0.2, 1);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ----------------------------------------------------------------------------
   Base typography & body
   ---------------------------------------------------------------------------- */
html, body {
  font-family: var(--font-sans) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11', 'ss01';
}

body {
  background: var(--bg) !important;
  color: var(--text-2) !important;
  font-size: 14px !important;
  line-height: 1.6 !important;
  letter-spacing: -0.005em !important;
  padding-left: var(--sidebar-w) !important;
  min-height: 100vh;
}

h1, h2, h3, h4, h5 {
  color: var(--text-1) !important;
  letter-spacing: -0.02em !important;
  font-weight: 600 !important;
}

code, pre, .mono { font-family: var(--font-mono) !important; }

/* ----------------------------------------------------------------------------
   Sidebar
   ---------------------------------------------------------------------------- */
.nav-bar {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  bottom: 0 !important;
  width: var(--sidebar-w) !important;
  height: 100vh !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 2px !important;
  padding: 28px 16px 24px 16px !important;
  background: var(--sidebar-bg) !important;
  border: none !important;
  border-right: 1px solid var(--sidebar-border) !important;
  box-shadow: none !important;
  overflow-y: auto;
  z-index: 50;
}

.nav-bar a {
  display: flex !important;
  align-items: center !important;
  padding: 10px 14px !important;
  border-radius: var(--radius-sm) !important;
  font-family: var(--font-sans) !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  color: var(--sidebar-fg) !important;
  text-decoration: none !important;
  transition: all var(--transition) !important;
  letter-spacing: -0.005em;
}

.nav-bar a:hover {
  background: var(--sidebar-active-bg) !important;
  color: var(--sidebar-fg-strong) !important;
}

.nav-bar a.active {
  background: var(--sidebar-active-bg) !important;
  color: var(--sidebar-active-fg) !important;
  font-weight: 600 !important;
  box-shadow: inset 2px 0 0 var(--sidebar-accent);
}

/* ----------------------------------------------------------------------------
   Header — flatter, no card chrome
   ---------------------------------------------------------------------------- */
.header {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 32px 48px 24px 48px !important;
  background: transparent !important;
  border: none !important;
  border-bottom: 1px solid var(--border) !important;
  box-shadow: none !important;
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: saturate(180%) blur(12px);
  background: rgba(250, 250, 250, 0.85) !important;
}

.header h1 {
  font-size: 22px !important;
  font-weight: 700 !important;
  color: var(--text-1) !important;
  letter-spacing: -0.025em !important;
  display: flex;
  align-items: center;
}

.header .meta {
  font-size: 12px !important;
  color: var(--text-3) !important;
  margin-top: 4px !important;
  font-weight: 500;
  letter-spacing: 0;
}

.header .actions { display: flex !important; gap: 8px !important; }

/* ----------------------------------------------------------------------------
   Content wrapper — wider gutters
   ---------------------------------------------------------------------------- */
.content {
  max-width: 1400px !important;
  margin: 0 auto !important;
  padding: 48px !important;
}

/* ----------------------------------------------------------------------------
   Buttons — refined pill style
   ---------------------------------------------------------------------------- */
.btn {
  padding: 9px 16px !important;
  border-radius: var(--radius-sm) !important;
  border: 1px solid var(--border-strong) !important;
  background: var(--surface) !important;
  color: var(--text-2) !important;
  cursor: pointer;
  font-family: var(--font-sans) !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  letter-spacing: -0.005em;
  transition: all var(--transition) !important;
  box-shadow: var(--shadow-1);
}

.btn:hover {
  background: var(--surface-soft) !important;
  border-color: var(--text-4) !important;
  color: var(--text-1) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.btn-primary {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
}
.btn-primary:hover {
  background: var(--accent-hover) !important;
  border-color: var(--accent-hover) !important;
  color: #fff !important;
}

.btn-success {
  background: var(--success) !important;
  border-color: var(--success) !important;
  color: #fff !important;
}
.btn-success:hover {
  background: #059669 !important;
  border-color: #059669 !important;
  color: #fff !important;
}

.btn-danger {
  background: var(--surface) !important;
  border-color: #fecaca !important;
  color: var(--danger) !important;
}
.btn-danger:hover { background: #fef2f2 !important; }

/* ----------------------------------------------------------------------------
   KPI cards — softer, less card-heavy
   ---------------------------------------------------------------------------- */
.kpi-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)) !important;
  gap: 1px !important;
  margin-bottom: 48px !important;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.kpi-card {
  background: var(--surface) !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 28px 32px !important;
  transition: background var(--transition) !important;
  box-shadow: none !important;
}
.kpi-card:hover { background: var(--surface-soft) !important; transform: none !important; }

.kpi-card .label {
  font-size: 11px !important;
  color: var(--text-3) !important;
  text-transform: uppercase !important;
  letter-spacing: 0.08em !important;
  font-weight: 600 !important;
  margin-bottom: 12px !important;
}
.kpi-card .value {
  font-size: 32px !important;
  font-weight: 700 !important;
  color: var(--text-1) !important;
  letter-spacing: -0.03em !important;
  line-height: 1.1 !important;
  font-feature-settings: 'tnum' 1;
}
.kpi-card .sub {
  font-size: 12px !important;
  color: var(--text-3) !important;
  margin-top: 8px !important;
  font-weight: 500;
}

.delta-positive { color: var(--success) !important; }
.delta-negative { color: var(--danger) !important; }

/* ----------------------------------------------------------------------------
   Sections
   ---------------------------------------------------------------------------- */
.section { margin-bottom: 48px !important; }
.section-header {
  font-size: 11px !important;
  font-weight: 600 !important;
  color: var(--text-3) !important;
  text-transform: uppercase !important;
  letter-spacing: 0.08em !important;
  margin-bottom: 20px !important;
}

/* ----------------------------------------------------------------------------
   Tables — borderless rows, generous padding
   ---------------------------------------------------------------------------- */
.table-wrap {
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-lg) !important;
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

table { width: 100%; border-collapse: collapse; }
th {
  text-align: left !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  color: var(--text-3) !important;
  text-transform: uppercase !important;
  letter-spacing: 0.08em !important;
  padding: 16px 24px !important;
  border-bottom: 1px solid var(--border) !important;
  background: var(--surface-soft) !important;
}
td {
  padding: 18px 24px !important;
  border-bottom: 1px solid var(--border) !important;
  font-size: 13px !important;
  color: var(--text-2) !important;
}
tr:last-child td { border-bottom: none !important; }
tr:hover { background: var(--surface-soft) !important; }

/* ----------------------------------------------------------------------------
   Tags / pills
   ---------------------------------------------------------------------------- */
.tag {
  display: inline-flex !important;
  align-items: center;
  padding: 3px 10px !important;
  border-radius: 6px !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  letter-spacing: 0.01em;
}
.tag-active, .tag-budget { background: #ecfdf5 !important; color: #047857 !important; }
.tag-paused, .tag-error { background: #fef2f2 !important; color: #b91c1c !important; }
.tag-testing, .tag-poll { background: var(--accent-soft) !important; color: var(--accent) !important; }
.tag-anomaly { background: #fffbeb !important; color: #b45309 !important; }
.tag-system { background: #f1f5f9 !important; color: #475569 !important; }

/* ----------------------------------------------------------------------------
   Status dots
   ---------------------------------------------------------------------------- */
.status-dot {
  width: 8px !important;
  height: 8px !important;
  border-radius: 50% !important;
  display: inline-block !important;
  margin-right: 10px !important;
}
.status-active { background: var(--success) !important; box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15); }
.status-warning { background: var(--warning) !important; box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15); }
.status-critical { background: var(--danger) !important; box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15); animation: pulse 1.5s infinite; }

/* ----------------------------------------------------------------------------
   Banners
   ---------------------------------------------------------------------------- */
.anomaly-banner {
  background: #fffbeb !important;
  border: 1px solid #fde68a !important;
  border-radius: var(--radius-lg) !important;
  padding: 24px 28px !important;
  margin-bottom: 48px !important;
}
.anomaly-banner h3 {
  color: #92400e !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  margin-bottom: 12px !important;
  letter-spacing: -0.005em !important;
}

/* ----------------------------------------------------------------------------
   Forms
   ---------------------------------------------------------------------------- */
input[type="text"], input[type="password"], input[type="email"], input[type="number"],
input[type="url"], input[type="search"], select, textarea {
  font-family: var(--font-sans) !important;
  font-size: 14px !important;
  padding: 11px 14px !important;
  border-radius: var(--radius-sm) !important;
  border: 1px solid var(--border-strong) !important;
  background: var(--surface) !important;
  color: var(--text-1) !important;
  transition: all var(--transition) !important;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-soft) !important;
}
label {
  font-size: 12px !important;
  font-weight: 600 !important;
  color: var(--text-2) !important;
  letter-spacing: 0;
}

/* ----------------------------------------------------------------------------
   Upload-page drop zone
   ---------------------------------------------------------------------------- */
.drop-zone {
  border: 2px dashed var(--border-strong) !important;
  border-radius: var(--radius-lg) !important;
  background: var(--surface-soft) !important;
  transition: all var(--transition) !important;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent) !important;
  background: var(--accent-soft) !important;
}

/* Generic card wrappers */
.card, .panel, .box {
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-1) !important;
}

/* ----------------------------------------------------------------------------
   Login page (no sidebar)
   ---------------------------------------------------------------------------- */
body.no-sidebar { padding-left: 0 !important; }
body.no-sidebar .nav-bar { display: none !important; }
.login-container {
  border-radius: var(--radius-lg) !important;
  border: 1px solid var(--border) !important;
  box-shadow: var(--shadow-2) !important;
  padding: 48px !important;
}

/* ----------------------------------------------------------------------------
   Mobile sidebar collapse
   ---------------------------------------------------------------------------- */
@media (max-width: 900px) {
  :root { --sidebar-w: 60px; }
  .nav-bar { padding: 64px 6px 16px 6px !important; }
  .nav-bar::before { left: 50%; transform: translateX(-50%); top: 20px; font-size: 10px; letter-spacing: 2px; }
  .nav-bar::after { display: none; }
  .nav-bar a {
    justify-content: center !important;
    padding: 12px 4px !important;
    font-size: 0 !important;
    overflow: hidden;
    white-space: nowrap;
  }
  .nav-bar a::first-letter {
    font-size: 15px !important;
    font-weight: 700;
  }
  .header { padding: 20px 24px !important; }
  .content { padding: 24px !important; }
}

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

/* ----------------------------------------------------------------------------
   Smooth scrollbars
   ---------------------------------------------------------------------------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 6px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--text-4); }

/* Sidebar scrollbar (dark) */
.nav-bar::-webkit-scrollbar-thumb { background: var(--sidebar-border); border-color: var(--sidebar-bg); }