@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* =========================================
   CSS Variables
   ========================================= */
:root {
  --sidebar-w: 256px;
  --sidebar-collapsed-w: 68px;
  --sidebar-bg: #0f172a;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-text: #94a3b8;
  --sidebar-text-hover: #f1f5f9;
  --sidebar-active-bg: rgba(59,130,246,0.12);
  --sidebar-active-text: #60a5fa;
  --sidebar-active-border: #3b82f6;

  --main-bg: #f1f5f9;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;

  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #eff6ff;
  --success: #22c55e;
  --success-light: #f0fdf4;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --info: #06b6d4;
  --info-light: #ecfeff;

  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --transition: 0.2s ease;
}

/* =========================================
   Reset & Base
   ========================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--main-bg);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

a { text-decoration: none; }
ul { list-style: none; }

/* =========================================
   App Layout
   ========================================= */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* =========================================
   Sidebar
   ========================================= */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: width var(--transition);
  overflow: hidden;
  border-right: 1px solid var(--sidebar-border);
}

.sidebar.collapsed { width: var(--sidebar-collapsed-w); }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px;
  border-bottom: 1px solid var(--sidebar-border);
  min-height: 68px;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.sidebar-logo img {
  width: 34px;
  height: 34px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.08);
  padding: 2px;
}

.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
}

.logo-sub {
  display: block;
  font-size: 10px;
  font-weight: 400;
  color: var(--sidebar-text);
  margin-top: 1px;
  white-space: nowrap;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--sidebar-text);
  cursor: pointer;
  padding: 5px;
  border-radius: var(--radius-sm);
  font-size: 18px;
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
}
.sidebar-toggle:hover { color: #fff; background: rgba(255,255,255,0.08); }

/* Nav */
.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; overflow-x: hidden; }
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.nav-section-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--sidebar-text);
  opacity: 0.5;
  padding: 16px 20px 6px;
  white-space: nowrap;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--sidebar-text);
  border-radius: var(--radius-sm);
  margin: 2px 8px;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
  border-left: 3px solid transparent;
}

.sidebar-nav li a:hover {
  background: rgba(255,255,255,0.06);
  color: var(--sidebar-text-hover);
  border-left-color: rgba(255,255,255,0.2);
}

.sidebar-nav li.active a {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
  border-left-color: var(--sidebar-active-border);
}

.sidebar-nav li a i {
  font-size: 17px;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

.sidebar-nav li a span { overflow: hidden; }

/* Footer */
.sidebar-footer {
  padding: 14px 16px;
  border-top: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.team-card {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.team-avatar {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.team-names { overflow: hidden; }
.team-names span { display: block; font-size: 12px; color: #cbd5e1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.team-names small { font-size: 10px; color: var(--sidebar-text); }

/* =========================================
   Main Content
   ========================================= */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: margin-left var(--transition);
}

.sidebar.collapsed ~ .main-content { margin-left: var(--sidebar-collapsed-w); }

/* =========================================
   Top Header
   ========================================= */
.top-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-left h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
}

.header-left .header-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin: 2px 0 0;
}

.header-right { display: flex; align-items: center; gap: 10px; }

.badge-source {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid #bfdbfe;
}

/* =========================================
   Page Body
   ========================================= */
.page-body { flex: 1; padding: 24px 28px; }

.page-intro { margin-bottom: 24px; }
.page-intro p { font-size: 14px; color: var(--text-secondary); max-width: 720px; line-height: 1.7; }

/* =========================================
   KPI Grid
   ========================================= */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow);
  border: 1px solid var(--card-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.kpi-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.kpi-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.kpi-blue .kpi-icon { background: var(--primary-light); color: var(--primary); }
.kpi-red .kpi-icon { background: var(--danger-light); color: var(--danger); }
.kpi-orange .kpi-icon { background: var(--warning-light); color: var(--warning); }
.kpi-green .kpi-icon { background: var(--success-light); color: var(--success); }

.kpi-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.5px;
}

.kpi-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 4px 0 2px;
}

.kpi-sub { font-size: 11px; color: var(--text-muted); }

/* =========================================
   Generic Card
   ========================================= */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--card-border);
  background: #fafbfc;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h2 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header h2 i { color: var(--primary); font-size: 16px; }

.card-body { padding: 20px; }

/* =========================================
   Upload Section
   ========================================= */
.upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.drop-zone {
  border: 2px dashed var(--card-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  background: #fafbfc;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
}

.drop-icon {
  font-size: 36px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 10px;
  transition: color var(--transition);
}

.drop-zone:hover .drop-icon, .drop-zone.drag-over .drop-icon { color: var(--primary); }

.drop-text { font-size: 14px; font-weight: 600; color: var(--text-secondary); margin-bottom: 4px; }
.drop-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 14px; }

.file-info { margin-top: 10px; font-size: 12px; color: var(--text-muted); min-height: 18px; }
.file-info.has-file { color: var(--success); font-weight: 600; }

.data-source-info h3 { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.data-source-info p { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; line-height: 1.6; }
.data-source-info .format-hint { font-size: 11px; color: var(--text-muted); font-family: monospace; background: var(--main-bg); padding: 6px 10px; border-radius: var(--radius-sm); margin-top: 8px; }

.action-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

.upload-status {
  margin-top: 12px;
  font-size: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: none;
}

.upload-status.success { display: block; background: var(--success-light); color: #15803d; border: 1px solid #bbf7d0; }
.upload-status.error { display: block; background: var(--danger-light); color: #dc2626; border: 1px solid #fecaca; }
.upload-status.info { display: block; background: var(--primary-light); color: var(--primary-dark); border: 1px solid #bfdbfe; }

/* =========================================
   Buttons
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; color: #fff; }
.btn-success:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--card-border);
}
.btn-outline:hover { background: var(--main-bg); border-color: #cbd5e1; color: var(--text-primary); text-decoration: none; }

/* =========================================
   Charts Section
   ========================================= */
.charts-section { display: flex; flex-direction: column; gap: 20px; margin-bottom: 8px; }

.charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.charts-row-3 { grid-template-columns: 1fr 1fr 1fr; }

.chart-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.chart-card:hover { box-shadow: var(--shadow-md); }

.chart-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: #fafbfc;
}

.chart-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chart-title i { font-size: 15px; color: var(--primary); }
.chart-title h3 { font-size: 13px; font-weight: 600; color: var(--text-primary); margin: 0; }

.chart-select {
  font-size: 11px;
  padding: 4px 8px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background: white;
  cursor: pointer;
  outline: none;
  max-width: 160px;
  transition: border-color var(--transition);
}

.chart-select:focus { border-color: var(--primary); }

.plot-div { height: 300px; }
.plot-div-tall { height: 340px; }

/* =========================================
   Main Footer
   ========================================= */
.main-footer {
  padding: 18px 28px;
  border-top: 1px solid var(--card-border);
  background: var(--card-bg);
  text-align: center;
}

.main-footer p { font-size: 12px; color: var(--text-muted); margin: 2px 0; }

/* =========================================
   Analysis Page
   ========================================= */
.analysis-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}

.analysis-card-header {
  padding: 14px 20px;
  background: #fafbfc;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.analysis-num {
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.analysis-card-header h2 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.analysis-card-header h2 i { color: var(--primary); }

.analysis-card-body { padding: 24px; }

.analysis-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: start;
}

.analysis-grid.reverse { grid-template-columns: 1fr 220px; }

.analysis-img {
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  width: 100%;
  box-shadow: var(--shadow-sm);
}

.analysis-text p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 12px; }

.analysis-text ul { font-size: 14px; color: var(--text-secondary); line-height: 1.8; padding-left: 20px; margin-bottom: 12px; }
.analysis-text ul li { margin-bottom: 4px; }

.highlight-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin-top: 12px;
}

.highlight-box p { font-size: 13px; color: var(--primary-dark); margin: 0; line-height: 1.6; }
.key-figure { font-weight: 700; color: var(--primary); }

.conclusion-card {
  background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
  border: 1px solid #c7d7ff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.conclusion-card h2 { font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.conclusion-card h2 i { color: var(--primary); }
.conclusion-card p, .conclusion-card ul li { font-size: 14px; color: var(--text-secondary); line-height: 1.75; }
.conclusion-card ul { padding-left: 20px; margin-top: 8px; }
.conclusion-card ul li { margin-bottom: 6px; }

/* =========================================
   Indicators Page
   ========================================= */
.indicator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.indicator-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 22px;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.indicator-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.indicator-icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
  flex-shrink: 0;
}

.ic-blue { background: var(--primary-light); color: var(--primary); }
.ic-green { background: var(--success-light); color: var(--success); }
.ic-orange { background: var(--warning-light); color: var(--warning); }
.ic-purple { background: #f5f3ff; color: #7c3aed; }
.ic-cyan { background: var(--info-light); color: var(--info); }

.indicator-card h2 { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
.indicator-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 10px; }

.indicator-note {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--main-bg);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-top: auto;
  border-left: 3px solid var(--primary-light);
}

.indicator-note strong { color: var(--text-secondary); }

.note-box {
  background: var(--info-light);
  border: 1px solid #a5f3fc;
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin-top: 8px;
  margin-bottom: 24px;
}

.note-box h4 { font-size: 14px; font-weight: 700; color: #0e7490; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.note-box p { font-size: 13px; color: #0e7490; margin: 0; line-height: 1.7; }

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

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 1280px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
  .charts-row-3 { grid-template-columns: 1fr 1fr; }
  .analysis-grid, .analysis-grid.reverse { grid-template-columns: 1fr; }
  .analysis-grid .analysis-img, .analysis-grid.reverse .analysis-img { max-width: 320px; }
}

@media (max-width: 900px) {
  :root { --sidebar-w: 68px; }
  .logo-text, .logo-sub, .sidebar-nav li a span, .team-names, .nav-section-label { display: none; }
  .sidebar-toggle { display: none; }
  .charts-row, .charts-row-3 { grid-template-columns: 1fr; }
  .upload-grid { grid-template-columns: 1fr; }
  .indicator-grid { grid-template-columns: 1fr; }
  .page-body { padding: 16px; }
  .top-header { padding: 14px 16px; }
}

@media (max-width: 640px) {
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .kpi-value { font-size: 20px; }
  .main-content { margin-left: var(--sidebar-collapsed-w); }
}