/* ============================================
   PA Stats Metrics — Neon Observatory Design System
   Base tokens, typography, glassmorphism, shared components
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Surfaces */
  --bg:                    #131318;
  --surface-dim:           #131318;
  --surface-container-lowest: #0e0e13;
  --surface-container-low: #1b1b20;
  --surface-container:     #1f1f25;
  --surface-container-high:#2a292f;
  --surface-container-highest:#35343a;
  --surface-bright:        #39383e;

  /* Primary */
  --primary:               #adc6ff;
  --primary-container:     #4d8eff;
  --on-primary:            #002e6a;
  --on-primary-container:  #00285d;

  /* Secondary */
  --secondary:             #c6c4da;
  --secondary-container:   #464557;

  /* Tertiary */
  --tertiary:              #c4c3e8;
  --tertiary-container:    #8e8eb0;

  /* Error */
  --error:                 #ffb4ab;

  /* Text */
  --on-surface:            #e4e1e9;
  --on-surface-variant:    #c2c6d6;
  --outline:               #8c909f;
  --outline-variant:       #424754;

  /* Fonts */
  --font-headline: 'Space Grotesk', sans-serif;
  --font-body:     'Inter', sans-serif;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

body {
  background-color: var(--bg);
  color: var(--on-surface);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

::selection {
  background: rgba(77, 142, 255, 0.3);
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--on-surface); }

/* --- Typography --- */
.font-headline { font-family: var(--font-headline); }
.font-body     { font-family: var(--font-body); }

.text-display   { font-family: var(--font-headline); font-size: 3.5rem; font-weight: 700; line-height: 1.1; }
.text-headline  { font-family: var(--font-headline); font-size: 1.5rem; font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
.text-title     { font-family: var(--font-headline); font-size: 1.125rem; font-weight: 600; }
.text-body      { font-family: var(--font-body); font-size: 0.875rem; }
.text-label     { font-family: var(--font-body); font-size: 0.6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; }
.text-label-xs  { font-family: var(--font-body); font-size: 0.625rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; }

.text-primary   { color: var(--primary); }
.text-muted     { color: var(--on-surface-variant); }
.text-surface   { color: var(--on-surface); }

/* --- Glassmorphism Card --- */
.glass-card {
  background: rgba(31, 31, 37, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(66, 71, 84, 0.15);
  border-top: 1px solid rgba(173, 198, 255, 0.1);
  border-radius: var(--radius-lg);
}

/* --- Top Navigation Bar --- */
.nav-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(19, 19, 24, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.nav-top::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, rgba(173, 198, 255, 0.1), transparent);
}

.nav-top .brand {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.03em;
}

.nav-top .nav-links {
  display: flex;
  gap: 1.5rem;
  margin-left: 2rem;
}

.nav-top .nav-links a {
  font-family: var(--font-headline);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--on-surface-variant);
  transition: color var(--transition-fast);
  letter-spacing: -0.01em;
}

.nav-top .nav-links a:hover {
  color: var(--on-surface);
}

.nav-top .nav-links a.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary-container);
  padding-bottom: 0.25rem;
}

/* --- Pill Buttons (Metric Selectors) --- */
.pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--surface-container-highest);
  color: var(--on-surface-variant);
}

.pill-btn:hover {
  color: var(--on-surface);
  background: var(--surface-bright);
}

.pill-btn.active,
.pill-btn.clicked {
  background: var(--primary-container);
  color: var(--on-primary-container);
  box-shadow: 0 0 15px rgba(77, 142, 255, 0.3);
}

.pill-btn.active:hover,
.pill-btn.clicked:hover {
  filter: brightness(1.1);
}

/* --- Section Headers --- */
.section-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
}

/* --- Input Fields --- */
.neon-input {
  width: 100%;
  padding: 0.875rem 1.25rem;
  background: transparent;
  border: none;
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
}

.neon-input::placeholder {
  color: rgba(194, 198, 214, 0.5);
}

.search-bar-wrapper {
  position: relative;
  max-width: 42rem;
  margin: 0 auto;
}

.search-bar-wrapper .glow {
  position: absolute;
  inset: 0;
  background: rgba(77, 142, 255, 0.05);
  filter: blur(24px);
  border-radius: var(--radius-full);
  pointer-events: none;
  transition: background var(--transition-normal);
}

.search-bar-wrapper:focus-within .glow {
  background: rgba(77, 142, 255, 0.1);
}

.search-bar {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(66, 71, 84, 0.2);
  transition: border-color var(--transition-normal);
}

.search-bar:focus-within {
  border-color: rgba(77, 142, 255, 0.5);
}

/* --- Filter Chips --- */
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid rgba(66, 71, 84, 0.2);
  background: var(--surface-container);
  color: var(--on-surface-variant);
}

.filter-chip:hover {
  border-color: rgba(77, 142, 255, 0.4);
}

.filter-chip.active {
  background: var(--primary-container);
  color: var(--on-primary-container);
  border-color: transparent;
  box-shadow: 0 0 15px rgba(77, 142, 255, 0.3);
}

/* --- Data Table --- */
.neon-table {
  width: 100%;
  text-align: left;
  border-collapse: collapse;
}

.neon-table thead tr {
  background: rgba(42, 41, 47, 0.5);
}

.neon-table thead th {
  padding: 1rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--on-surface-variant);
}

.neon-table tbody tr {
  border-bottom: 1px solid rgba(66, 71, 84, 0.05);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.neon-table tbody tr:hover {
  background: rgba(77, 142, 255, 0.05);
}

.neon-table tbody td {
  padding: 1.25rem 1.5rem;
  font-size: 0.875rem;
  color: var(--on-surface);
}

.neon-table tbody td .sub-text {
  font-size: 0.6875rem;
  color: var(--on-surface-variant);
}

/* --- Status Chips / Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: rgba(173, 198, 255, 0.1);
  color: var(--primary);
  border: 1px solid rgba(173, 198, 255, 0.2);
}

.badge-secondary {
  background: rgba(198, 196, 218, 0.1);
  color: var(--secondary);
  border: 1px solid rgba(198, 196, 218, 0.2);
}

/* --- Action Buttons --- */
.btn-neon-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--primary-container);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-neon-primary:hover {
  filter: brightness(1.1);
  transform: scale(1.02);
}

.btn-neon-primary:active {
  transform: scale(0.98);
}

.btn-neon-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(53, 52, 58, 0.4);
  color: var(--on-surface-variant);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid rgba(66, 71, 84, 0.2);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-neon-ghost:hover {
  background: var(--surface-container-highest);
  color: var(--on-surface);
}

/* --- Copy Button --- */
.copy-btn {
  background: none;
  border: none;
  color: var(--on-surface-variant);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 0.25rem;
  transition: color var(--transition-fast);
  font-size: 0.8125rem;
}

.copy-btn:hover {
  color: var(--primary);
}

.copy-btn.copied {
  color: #10b981;
}

/* --- Stat Cards (Bento) --- */
.stat-card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(66, 71, 84, 0.1);
  transition: border-color var(--transition-normal);
}

.stat-card:hover {
  border-color: rgba(173, 198, 255, 0.3);
}

.stat-card .value {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

/* --- Chart Grid Background --- */
.chart-grid-bg {
  background-image: linear-gradient(to right, rgba(66, 71, 84, 0.1) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(66, 71, 84, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* --- Layout Helpers --- */
.page-content {
  padding-top: 5rem;
  padding-bottom: 3rem;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  max-width: 80rem;
  margin: 0 auto;
}

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* --- Decorative Background Glows --- */
.bg-glow-tl,
.bg-glow-br {
  position: fixed;
  width: 40%;
  height: 40%;
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

.bg-glow-tl {
  top: -10%;
  left: -10%;
  background: rgba(77, 142, 255, 0.05);
  filter: blur(120px);
}

.bg-glow-br {
  bottom: -10%;
  right: -10%;
  background: rgba(173, 198, 255, 0.05);
  filter: blur(120px);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-top .nav-links { display: none; }
  .page-content { padding-left: 1rem; padding-right: 1rem; }
}