/* ============================================================
   Design System — CSS Custom Properties
   ============================================================ */
:root {
  /* Backgrounds */
  --color-bg-base:        #0F1117;
  --color-bg-card:        #1A1D27;
  --color-bg-elevated:    #222535;
  --color-bg-input:       #2A2D3E;

  /* Borders */
  --color-border:         #2E3347;
  --color-border-active:  #00D4FF;

  /* Text */
  --color-text-primary:   #E2E8F0;
  --color-text-secondary: #94A3B8;
  --color-text-muted:     #64748B;
  --color-text-inverse:   #0F1117;

  /* Accent */
  --color-accent-cyan:    #00D4FF;
  --color-accent-violet:  #7C3AED;

  /* Status */
  --color-success:        #10B981;
  --color-warning:        #F59E0B;
  --color-danger:         #EF4444;

  /* Brand colors */
  --brand-qv:             #00D4FF;
  --brand-cetaphil:       #7C3AED;
  --brand-bepanthen:      #10B981;
  --brand-florena:        #F59E0B;
  --brand-avene:          #EF4444;
  --brand-vichy:          #8B5CF6;

  /* Typography */
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-arabic:  'Inter', 'Segoe UI', Tahoma, Arial, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  --text-xs:    0.75rem;
  --text-sm:    0.875rem;
  --text-base:  1rem;
  --text-lg:    1.125rem;
  --text-xl:    1.25rem;
  --text-2xl:   1.5rem;
  --text-3xl:   1.875rem;
  --text-4xl:   2.25rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.3;
}

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

a:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-accent-cyan);
  outline-offset: 2px;
}

/* ============================================================
   Layout — Container & Grid
   ============================================================ */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.main {
  padding: var(--space-6) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ============================================================
   Header
   ============================================================ */
.header {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-logo {
  flex-shrink: 0;
}

.header-title {
  font-size: var(--text-xl);
  color: var(--color-text-primary);
}

.header-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.header-meta {
  white-space: nowrap;
}

/* ============================================================
   Filter Bar
   ============================================================ */
.filter-bar {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  top: 64px;
  z-index: 90;
}

.filter-bar.sticky {
  position: sticky;
}

.filter-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* Segmented buttons */
.segmented {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.seg-btn {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  transition: background 0.15s, color 0.15s;
}

.seg-btn + .seg-btn {
  border-left: 1px solid var(--color-border);
}

.seg-btn.active,
.seg-btn[aria-pressed="true"] {
  background: var(--color-accent-cyan);
  color: var(--color-text-inverse);
  font-weight: 600;
}

.seg-btn:hover:not(.active) {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
}

/* Brand pills */
.brand-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.brand-pill {
  border: 2px solid transparent;
  border-radius: var(--radius-xl);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  transition: opacity 0.15s, transform 0.1s;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.brand-pill:hover {
  transform: translateY(-1px);
}

.brand-pill.inactive {
  opacity: 0.35;
  filter: saturate(0.3);
}

/* Select */
.select {
  appearance: none;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394A3B8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
}

.select:focus {
  border-color: var(--color-border-active);
  outline: none;
}

/* ============================================================
   KPI Cards
   ============================================================ */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.kpi-card {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 140px;
}

.kpi-icon {
  font-size: var(--text-xl);
  line-height: 1;
}

.kpi-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

.kpi-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

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

/* Momentum list inside KPI card */
.momentum-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-1);
}

.momentum-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.momentum-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.momentum-name {
  flex: 1;
  color: var(--color-text-primary);
}

.momentum-arrow {
  font-weight: 700;
}

.momentum-arrow.up   { color: var(--color-success); }
.momentum-arrow.down { color: var(--color-danger); }
.momentum-arrow.flat { color: var(--color-text-muted); }

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 0 0 1px rgba(0, 212, 255, 0.2), 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ============================================================
   Chart sections
   ============================================================ */
.chart-section {
  padding: var(--space-6);
}

.chart-full {
  width: 100%;
}

.chart-row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.chart-title {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.chart-error {
  padding: var(--space-4);
  color: var(--color-danger);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.retry-btn {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-3);
}

.retry-btn:hover {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
}

.empty-state {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--space-4);
  text-align: center;
}

/* ============================================================
   Skeleton shimmer
   ============================================================ */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-card)     25%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-card)     75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
  min-height: 40px;
}

/* Don't shimmer content that loaded */
.skeleton canvas,
.skeleton .chart-title {
  visibility: hidden;
}

/* ============================================================
   Keyword panel
   ============================================================ */
.keyword-panel {
  padding: var(--space-4) var(--space-6);
}

.keyword-cards {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  padding-bottom: var(--space-2);
}

.kw-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-width: 140px;
  padding: var(--space-3) var(--space-4);
  flex-shrink: 0;
}

.kw-badge {
  border-radius: var(--radius-sm);
  color: var(--color-text-inverse);
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px var(--space-2);
  margin-bottom: var(--space-2);
}

.kw-badge.brand-en  { background: var(--color-accent-cyan); }
.kw-badge.brand-ar  { background: var(--color-accent-violet); }
.kw-badge.product-en { background: var(--color-success); }
.kw-badge.product-ar { background: var(--color-warning); }

.kw-keyword {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.kw-score {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================================
   Drill-down modal
   ============================================================ */
.drilldown-overlay {
  align-items: center;
  background: rgba(0,0,0,0.7);
  bottom: 0;
  display: flex;
  justify-content: center;
  left: 0;
  padding: var(--space-8);
  position: fixed;
  right: 0;
  top: 0;
  z-index: 200;
}

.drilldown-panel {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  max-height: 80vh;
  max-width: 600px;
  overflow-y: auto;
  padding: var(--space-8);
  width: 100%;
}

.drilldown-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.drilldown-brand-name {
  font-size: var(--text-2xl);
}

.close-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--text-lg);
  height: 36px;
  width: 36px;
}

.close-btn:hover {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
}

.drilldown-section {
  margin-bottom: var(--space-6);
}

.drilldown-section-title {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

.query-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.query-row {
  align-items: center;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
}

.query-text {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

.query-value {
  font-size: var(--text-sm);
  color: var(--color-accent-cyan);
  font-weight: 600;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-12);
  padding: var(--space-6) 0;
  text-align: center;
}

/* ============================================================
   Utility classes
   ============================================================ */
.hidden  { display: none !important; }
.text-secondary { color: var(--color-text-secondary); }
.text-sm        { font-size: var(--text-sm); }
.text-success   { color: var(--color-success); }
.text-danger    { color: var(--color-danger); }

/* ============================================================
   Responsive breakpoints
   ============================================================ */

/* 900px–1200px: 2-col KPI row */
@media (max-width: 1200px) {
  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* < 900px: 1-col layout */
@media (max-width: 900px) {
  .kpi-row {
    grid-template-columns: 1fr;
  }

  .chart-row-2col {
    grid-template-columns: 1fr;
  }

  .filter-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* < 600px: compact */
@media (max-width: 600px) {
  .container {
    padding: 0 var(--space-4);
  }

  .header-logo {
    display: none;
  }

  .kpi-icon {
    display: none;
  }

  .header-title {
    font-size: var(--text-lg);
  }
}