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

:root {
  /* Base (Dark-Native) */
  --color-bg-base:      #080A0F;   /* Near-black with blue undertone */
  --color-bg-surface:   #0F1117;   /* Cards, panels */
  --color-bg-elevated:  #161B24;   /* Dropdowns, modals, tooltips */
  --color-bg-overlay:   #1C2333;   /* Hover states, selected rows */
  --color-border:       #1E2A3A;   /* Subtle borders */
  --color-border-strong:#2A3A4E;   /* Dividers, focused inputs */

  /* Text Colors */
  --color-text-primary:   #F0F4F8;  /* Headings, key data */
  --color-text-secondary: #8B9CB0;  /* Labels, metadata */
  --color-text-muted:     #4A5568;  /* Timestamps, disabled */
  --color-text-inverse:   #080A0F;  /* Text on accent buttons */

  /* Brand Accent */
  --color-accent:         #6366F1;  /* Indigo */
  --color-accent-hover:   #4F52D9;
  --color-accent-muted:   rgba(99, 102, 241, 0.12);
  --color-accent-glow:    rgba(99, 102, 241, 0.25);

  /* Signal Colors */
  --color-bull:           #10B981;  /* Emerald green */
  --color-bull-muted:     rgba(16, 185, 129, 0.12);
  --color-bear:           #F43F5E;  /* Rose red */
  --color-bear-muted:     rgba(244, 63, 94, 0.12);
  --color-neutral:        #F59E0B;  /* Amber */
  --color-neutral-muted:  rgba(245, 158, 11, 0.12);
  --color-data:           #38BDF8;  /* Sky blue */
  --color-data-muted:     rgba(56, 189, 248, 0.12);

  /* Typography Fallbacks */
  --font-sans: 'Geist', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Geist Mono', 'JetBrains Mono', 'IBM Plex Mono', monospace;

  /* Spacing Scale (4px base) */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-10: 40px;
  --space-12: 48px; --space-16: 64px; --space-20: 80px;

  /* Type Scale */
  --text-xs: 11px; --text-sm: 13px; --text-base: 15px;
  --text-lg: 17px; --text-xl: 20px; --text-2xl: 24px;
  --text-3xl: 30px; --text-4xl: 38px; --text-display: 52px;

  /* Border Radius */
  --radius-sm: 4px; --radius-md: 6px; --radius-lg: 10px;
  --radius-xl: 14px; --radius-full: 9999px;

  /* Animation Timing */
  --transition-fast: 80ms ease;
  --transition-base: 150ms ease;
}

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

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

body {
  background: var(--color-bg-base);
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  cursor: pointer;
  font-family: var(--font-sans);
  border: none;
  background: none;
  outline: none;
}

/* Utility Classes */
.font-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.text-bull { color: var(--color-bull); }
.text-bear { color: var(--color-bear); }
.text-accent { color: var(--color-accent); }
.text-data { color: var(--color-data); }
.text-muted { color: var(--color-text-muted); }
.heading { letter-spacing: -0.02em; font-weight: 600; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--space-6); }

/* Card Primitive */
.card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--transition-base);
}
.card:hover {
  border-color: var(--color-border-strong);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
  transition: transform var(--transition-fast);
}

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

.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-primary);
}
.btn-secondary:hover {
  background: var(--color-bg-elevated);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-destructive {
  background: var(--color-bear-muted);
  color: var(--color-bear);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.btn-sm { height: 32px; padding: 0 var(--space-3); }
.btn-md { height: 38px; padding: 0 var(--space-4); }
.btn-lg { height: 44px; padding: 0 var(--space-5); }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 2px 6px;
}

.badge-bull { color: var(--color-bull); background: var(--color-bull-muted); }
.badge-bear { color: var(--color-bear); background: var(--color-bear-muted); }
.badge-data { color: var(--color-data); background: var(--color-data-muted); }
.badge-accent { color: var(--color-accent); background: var(--color-accent-muted); }
.badge-muted { color: var(--color-text-muted); background: rgba(139, 156, 176, 0.12); }

/* Live Dot Indicator */
.badge-live {
  position: relative;
  padding-left: 16px;
}

.badge-live::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-bull);
  animation: pulse-live 2s infinite;
}

@keyframes pulse-live {
  0%, 100% { opacity: 1; transform: translateY(-50%) scale(1); }
  50% { opacity: 0.5; transform: translateY(-50%) scale(1.4); }
}

/* Data Table */
.data-table-container {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  color: var(--color-text-secondary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  background: var(--color-bg-elevated);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  transition: background var(--transition-fast);
}

.data-table tr:hover td {
  background: var(--color-bg-overlay);
}

.data-table .num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* Input */
.input {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: 10px 14px;
  outline: none;
  transition: border-color var(--transition-base);
  width: 100%;
}

.input:focus {
  border-color: var(--color-accent);
}

.input::placeholder {
  color: var(--color-text-muted);
}

/* KPI Card Utilities */
.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Skeleton Loader */
.skeleton {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  min-height: 1em;
}

.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.04) 50%, transparent 100%);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* FAQ Accordion */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--color-bg-surface);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 16px 20px;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--text-base);
  font-weight: 500;
  text-align: left;
  transition: background var(--transition-base);
}

.faq-question:hover {
  background: var(--color-bg-elevated);
}

.faq-icon {
  color: var(--color-text-secondary);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms cubic-bezier(0.4, 0, 0.2, 1), padding 300ms ease;
  padding: 0 20px;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 20px 20px;
}

/* ─── Text Hierarchy Fix ─── */
/* secondary = readable body text, muted = truly dim/disabled */
.text-secondary { color: var(--color-text-secondary); }

/* ─── Touch Targets (Mobile Accessibility) ─── */
@media (max-width: 768px) {
  .btn, .nav-link, .faq-question, .sidebar-link {
    min-height: 44px;
  }
  .btn-sm { min-height: 36px; } /* small buttons get slight exception */
}

/* ─── Mobile Sticky CTA Bar ─── */
.mobile-cta-bar {
  display: none;
}
@media (max-width: 768px) {
  .mobile-cta-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    padding: 10px 16px;
    background: rgba(8, 10, 15, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
    z-index: 200;
    gap: 12px;
  }
  .mobile-cta-bar .btn { flex: 1; justify-content: center; min-height: 44px; }
  body.has-mobile-cta { padding-bottom: 76px; }
}

/* ─── Horizontal Scroll Hint (Live Strip, Tables) ─── */
.scroll-hint-wrap {
  position: relative;
}
.scroll-hint-wrap::after {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 56px;
  background: linear-gradient(to right, transparent, var(--color-bg-base));
  pointer-events: none;
}
@media (min-width: 769px) {
  .scroll-hint-wrap::after { display: none; }
}

/* ─── Fluid/Clamp Utilities ─── */
.text-display-fluid { font-size: clamp(28px, 6vw, 52px); }
.text-hero-fluid    { font-size: clamp(30px, 7vw, 40px); }
.savings-fluid      { font-size: clamp(26px, 8vw, 38px); }