/* ============================================================
   Polling Rate Test — Design System & Styles
   Clean, modern gaming/tech dark-theme aesthetic
   ============================================================ */

/* ---------- Custom Properties / Design Tokens ---------- */
:root {
  --clr-black: #0A0A0A;
  --clr-charcoal: #131313;
  --clr-card: #1A1A1A;
  --clr-card-hover: #202020;
  --clr-border: #2C2C2C;
  --clr-border-light: #3D3D3D;
  --clr-lime: #C0FF6B;
  --clr-lime-hover: #a7ec4e;
  --clr-lime-10: rgba(192, 255, 107, 0.1);
  --clr-lime-15: rgba(192, 255, 107, 0.15);
  --clr-lime-20: rgba(192, 255, 107, 0.2);
  --clr-lime-30: rgba(192, 255, 107, 0.3);
  --clr-lime-40: rgba(192, 255, 107, 0.4);
  --clr-silver: #D5D5D5;
  --clr-muted: #8A8A8A;
  --clr-danger: #FF4B4B;
  --clr-amber: #fbbf24;
  --clr-white: #ffffff;

  --shadow-lime-glow: 0 0 25px -4px rgba(192, 255, 107, 0.35);
  --shadow-lime-subtle: 0 0 12px 0 rgba(192, 255, 107, 0.2);

  --font-sans: 'JetBrains Mono', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-w-content: 1152px;
  --max-w-narrow: 768px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--clr-black);
  color: var(--clr-silver);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Subtle tech grid background */
  background-size: 32px 32px;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
}

::selection {
  background: var(--clr-lime);
  color: var(--clr-black);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

code {
  font-family: var(--font-mono);
  color: var(--clr-lime);
  font-size: 0.85em;
}

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

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--clr-black);
}

::-webkit-scrollbar-thumb {
  background: #262626;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #383838;
}

/* ---------- Utilities ---------- */
.container {
  max-width: var(--max-w-content);
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
}

.font-mono-data {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" on, "zero" on;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ---------- Animations ---------- */
@keyframes pulse-lime {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

.live-pulse {
  animation: pulse-lime 1.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.4s ease-out forwards;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  border-bottom: 1px solid var(--clr-border);
  background: rgba(19, 19, 19, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--max-w-content);
  margin: 0 auto;
  padding: 0 1rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 640px) {
  .header-inner {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .header-inner {
    padding: 0 2rem;
  }
}

/* Logo */
.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem;
  border-radius: 4px;
  transition: all 0.2s;
}

.logo-link:focus-visible {
  outline: 2px solid var(--clr-lime);
  outline-offset: 2px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: var(--clr-lime-10);
  border: 1px solid var(--clr-lime-30);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-lime);
  transition: all 0.2s;
}

.logo-link:hover .logo-icon {
  border-color: var(--clr-lime);
  box-shadow: var(--shadow-lime-subtle);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-name {
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  font-size: 1rem;
}

@media (min-width: 640px) {
  .logo-name {
    font-size: 1.125rem;
  }
}

.logo-badge {
  font-size: 10px;
  text-transform: uppercase;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--clr-lime-15);
  color: var(--clr-lime);
  border: 1px solid var(--clr-lime-30);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--clr-muted);
  display: none;
}

@media (min-width: 640px) {
  .logo-subtitle {
    display: inline;
  }
}

/* Desktop Nav */
.desktop-nav {
  display: none;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.875rem;
  font-weight: 500;
}

@media (min-width: 768px) {
  .desktop-nav {
    display: flex;
  }
}

.desktop-nav a {
  color: var(--clr-silver);
  transition: color 0.2s;
}

.desktop-nav a:hover {
  color: var(--clr-lime);
}

.nav-link-active {
  color: var(--clr-white) !important;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.nav-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-lime);
}

/* Header CTA */
.header-cta {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .header-cta {
    display: flex;
  }
}

.btn-header-cta {
  padding: 0.375rem 0.875rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--clr-lime-10);
  color: var(--clr-lime);
  border: 1px solid var(--clr-lime-30);
  transition: all 0.2s;
}

.btn-header-cta:hover {
  background: var(--clr-lime);
  color: var(--clr-black);
  box-shadow: var(--shadow-lime-glow);
}

/* Mobile hamburger */
.mobile-menu-btn {
  display: flex;
  padding: 0.5rem;
  border-radius: 4px;
  color: var(--clr-muted);
  transition: all 0.2s;
}

.mobile-menu-btn:hover {
  color: var(--clr-white);
  background: var(--clr-card);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile drawer */
.mobile-menu {
  display: none;
  border-bottom: 1px solid var(--clr-border);
  background: var(--clr-charcoal);
  padding: 0.5rem 1rem 1rem;
}

.mobile-menu.is-open {
  display: block;
}

@media (min-width: 768px) {
  .mobile-menu {
    display: none !important;
  }
}

.mobile-menu a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--clr-silver);
  transition: all 0.15s;
}

.mobile-menu a:hover {
  background: var(--clr-card);
  color: var(--clr-lime);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid rgba(44, 44, 44, 0.6);
  text-align: center;
}

@media (min-width: 640px) {
  .hero {
    padding: 4rem 0 3.5rem;
  }
}

.hero-inner {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .hero-inner {
    padding: 0 1.5rem;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  font-size: 0.75rem;
  color: var(--clr-silver);
  margin-bottom: 1.5rem;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-lime);
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .hero h1 {
    font-size: 3rem;
  }
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 3.75rem;
    line-height: 1;
  }
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(213, 213, 213, 0.9);
  font-weight: 500;
  margin-bottom: 0.75rem;
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 640px) {
  .hero-subtitle {
    font-size: 1.25rem;
  }
}

.hero-desc {
  font-size: 0.875rem;
  color: var(--clr-muted);
  max-width: 32rem;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

@media (min-width: 640px) {
  .hero-desc {
    font-size: 1rem;
  }
}

/* Hero CTA Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 6px;
  background: var(--clr-lime);
  color: var(--clr-black);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: all 0.2s;
  box-shadow: var(--shadow-lime-glow);
  border: none;
  cursor: pointer;
  width: 100%;
}

@media (min-width: 640px) {
  .btn-primary {
    width: auto;
  }
}

.btn-primary:hover {
  background: var(--clr-lime-hover);
  transform: scale(1.02);
}

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

/* Trust bar */
.trust-bar {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--clr-muted);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.trust-sep {
  color: var(--clr-border);
}

/* ============================================================
   TESTING TOOL SECTION
   ============================================================ */
section[id] {
  scroll-margin-top: 5rem;
}

.test-section {
  padding: 3rem 0;
  scroll-margin-top: 5rem;
}

.test-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .test-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.test-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (min-width: 640px) {
  .test-title {
    font-size: 1.5rem;
  }
}

.status-pill {
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 500;
  border: 1px solid var(--clr-border);
  background: var(--clr-card);
  color: var(--clr-muted);
  text-transform: uppercase;
}

.status-pill.active {
  color: var(--clr-lime);
  border-color: var(--clr-lime-40);
  background: var(--clr-lime-10);
}

.test-meta {
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 0.25rem;
}

/* Duration selector */
.duration-selector {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  padding: 4px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.duration-label {
  color: var(--clr-muted);
  padding: 0 0.5rem;
}

.duration-btn {
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  color: var(--clr-silver);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border: 1px solid transparent;
  background: transparent;
  transition: all 0.15s;
  cursor: pointer;
}

.duration-btn:hover {
  color: var(--clr-white);
}

.duration-btn.selected {
  background: var(--clr-card);
  border-color: var(--clr-border-light);
  color: var(--clr-white);
  font-weight: 600;
}

/* Testing container */
.testing-container {
  position: relative;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transition: all 0.3s;
}

.testing-container.is-active {
  border-color: var(--clr-lime-40);
  box-shadow: var(--shadow-lime-glow);
}

/* Metric ribbon */
.metric-ribbon {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-bottom: 1px solid var(--clr-border);
  background: var(--clr-charcoal);
}

@media (min-width: 768px) {
  .metric-ribbon {
    grid-template-columns: repeat(4, 1fr);
  }
}

.metric-cell {
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--clr-border);
}

.metric-cell:last-child {
  border-right: none;
}

@media (max-width: 767px) {
  .metric-cell:nth-child(2) {
    border-right: none;
  }

  .metric-cell:nth-child(3),
  .metric-cell:nth-child(4) {
    border-top: 1px solid var(--clr-border);
  }
}

.metric-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--clr-muted);
  margin-bottom: 0.25rem;
}

.metric-value {
  display: flex;
  align-items: baseline;
  gap: 0.375rem;
}

.metric-num {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" on, "zero" on;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-white);
}

@media (min-width: 640px) {
  .metric-num {
    font-size: 1.875rem;
  }
}

.metric-num.accent {
  color: var(--clr-lime);
}

.metric-unit {
  font-size: 0.75rem;
  color: var(--clr-muted);
  font-family: var(--font-mono);
}

/* Test canvas zone */
.test-canvas-zone {
  position: relative;
  width: 100%;
  height: 320px;
  background: #0E0E0E;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  user-select: none;
  cursor: crosshair;
  overflow: hidden;
}

@media (min-width: 640px) {
  .test-canvas-zone {
    height: 384px;
  }
}

.test-canvas-zone canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#frequency-canvas {
  opacity: 0.4;
}

/* Idle overlay */
.idle-overlay {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem;
  transition: all 0.3s;
}

.idle-overlay.hidden {
  display: none;
}

.idle-icon-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-lime);
  margin-bottom: 1rem;
  transition: transform 0.2s;
}

.test-canvas-zone:hover .idle-icon-circle {
  transform: scale(1.1);
}

.idle-overlay h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.5rem;
}

@media (min-width: 640px) {
  .idle-overlay h3 {
    font-size: 1.5rem;
  }
}

.idle-overlay p {
  font-size: 0.875rem;
  color: var(--clr-muted);
  max-width: 28rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* Running overlay */
.running-overlay {
  position: relative;
  z-index: 10;
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  pointer-events: none;
  padding: 1rem;
}

.running-overlay.visible {
  display: flex;
}

.motion-hint-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(19, 19, 19, 0.9);
  border: 1px solid var(--clr-lime-40);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
  box-shadow: var(--shadow-lime-subtle);
}

.motion-hint-bar .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-lime);
}

.motion-hint-text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--clr-white);
  font-weight: 500;
}

.countdown-display {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-mono);
  font-feature-settings: "tnum" on, "zero" on;
  color: var(--clr-white);
  letter-spacing: -0.03em;
}

@media (min-width: 640px) {
  .countdown-display {
    font-size: 3.75rem;
  }
}

.countdown-unit {
  font-size: 1.25rem;
  color: var(--clr-muted);
  margin-left: 0.25rem;
}

@media (min-width: 640px) {
  .countdown-unit {
    font-size: 1.5rem;
  }
}

.motion-indicator {
  margin-top: 1rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--clr-muted);
  background: rgba(10, 10, 10, 0.7);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--clr-border);
}

.motion-indicator .speed-val {
  color: var(--clr-lime);
}

.motion-indicator .speed-val.slow {
  color: var(--clr-amber);
}

/* Progress bar */
.progress-track {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--clr-border);
}

.progress-fill {
  height: 100%;
  background: var(--clr-lime);
  width: 0;
  transition: width 0.1s linear;
}

/* ============================================================
   RESULTS DASHBOARD
   ============================================================ */
.results-dashboard {
  display: none;
  margin-top: 2rem;
  transition: all 0.5s;
}

.results-dashboard.visible {
  display: block;
  animation: fadeInUp 0.5s ease-out;
}

.results-card {
  background: var(--clr-card);
  border: 2px solid rgba(192, 255, 107, 0.5);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: var(--shadow-lime-glow);
}

@media (min-width: 640px) {
  .results-card {
    padding: 2rem;
  }
}

.results-header {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  border-bottom: 1px solid var(--clr-border);
  padding-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .results-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.results-complete-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--clr-lime);
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.results-complete-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-lime);
}

.results-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-white);
}

@media (min-width: 640px) {
  .results-header h3 {
    font-size: 1.875rem;
  }
}

.results-header .sub {
  font-size: 0.875rem;
  color: var(--clr-muted);
  margin-top: 0.25rem;
}

/* Rerun button */
.btn-rerun {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: 6px;
  background: var(--clr-lime);
  color: var(--clr-black);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all 0.2s;
  box-shadow: var(--shadow-lime-subtle);
  border: none;
  cursor: pointer;
}

.btn-rerun:hover {
  background: var(--clr-lime-hover);
  transform: scale(1.05);
}

.btn-rerun:active {
  transform: scale(0.95);
}

/* Result body layout */
.results-body {
  padding: 2rem 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .results-body {
    grid-template-columns: 5fr 7fr;
  }
}

/* Large Hz readout */
.hz-readout {
  text-align: center;
}

@media (min-width: 1024px) {
  .hz-readout {
    text-align: left;
  }
}

.hz-readout .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--clr-muted);
  margin-bottom: 0.25rem;
}

.hz-readout .value-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
}

@media (min-width: 1024px) {
  .hz-readout .value-row {
    justify-content: flex-start;
  }
}

.hz-number {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" on, "zero" on;
  font-size: 3.75rem;
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.03em;
}

@media (min-width: 640px) {
  .hz-number {
    font-size: 4.5rem;
  }
}

.hz-unit {
  font-size: 1.5rem;
  font-family: var(--font-mono);
  color: var(--clr-lime);
  font-weight: 700;
  margin-left: 0.5rem;
}

.tier-badge-row {
  margin-top: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border-light);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.tier-badge-label {
  color: var(--clr-muted);
}

.tier-badge-value {
  font-weight: 700;
  color: var(--clr-lime);
  font-size: 0.875rem;
}

.interval-note {
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 0.75rem;
}

.interval-note span {
  color: var(--clr-white);
  font-family: var(--font-mono);
  font-weight: 500;
}

/* Tier spectrum */
.tier-spectrum {
  background: rgba(19, 19, 19, 0.8);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.tier-spectrum-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--clr-silver);
  margin-bottom: 0.75rem;
}

.tier-pills {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.25rem;
  margin-bottom: 0.5rem;
  text-align: center;
  font-size: 10px;
  font-family: var(--font-mono);
}

@media (min-width: 640px) {
  .tier-pills {
    gap: 0.5rem;
    font-size: 0.75rem;
  }
}

.tier-pill {
  padding: 0.375rem;
  border-radius: 4px;
  border: 1px solid var(--clr-border);
  background: var(--clr-card);
  color: var(--clr-silver);
  transition: all 0.3s;
}

.tier-pill.highlight {
  background: var(--clr-lime);
  color: var(--clr-black);
  font-weight: 700;
  border-color: var(--clr-lime);
}

.tier-pill .full-text {
  display: none;
}

@media (min-width: 640px) {
  .tier-pill .full-text {
    display: inline;
  }
}

/* Gauge bar */
.gauge-track {
  height: 10px;
  background: var(--clr-black);
  border-radius: 9999px;
  overflow: hidden;
  border: 1px solid var(--clr-border);
  padding: 2px;
  margin-bottom: 0.75rem;
}

.gauge-fill {
  height: 100%;
  background: var(--clr-lime);
  border-radius: 9999px;
  transition: width 0.7s ease-out;
}

.tier-description {
  font-size: 0.75rem;
  color: var(--clr-muted);
  line-height: 1.7;
}

/* Detailed stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--clr-border);
}

@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  background: var(--clr-charcoal);
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--clr-border);
}

.stat-card .label {
  display: block;
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-bottom: 0.25rem;
}

.stat-card .value {
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--clr-white);
}

/* Browser notice */
.browser-notice {
  margin-top: 1.25rem;
  padding: 0.875rem;
  border-radius: 6px;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.browser-notice svg {
  flex-shrink: 0;
  margin-top: 2px;
}

.browser-notice p {
  font-size: 0.75rem;
  color: var(--clr-silver);
  line-height: 1.6;
}

.browser-notice strong {
  color: var(--clr-white);
}

/* ============================================================
   POLLING RATE GUIDE
   ============================================================ */
.guide-section {
  padding: 4rem 0;
  background: var(--clr-charcoal);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.section-header {
  text-align: center;
  max-width: 48rem;
  margin: 0 auto 3rem;
}

.section-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--clr-lime);
  font-weight: 600;
}

.section-title {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  margin-top: 0.5rem;
}

.section-desc {
  font-size: 0.875rem;
  color: var(--clr-muted);
  margin-top: 0.5rem;
}

/* Guide table */
.table-wrapper {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--clr-border);
  background: var(--clr-card);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  margin-bottom: 2rem;
}

.guide-table {
  text-align: left;
  font-size: 0.875rem;
}

.guide-table thead tr {
  border-bottom: 1px solid var(--clr-border);
  background: var(--clr-charcoal);
}

.guide-table th {
  padding: 0.875rem 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--clr-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

@media (min-width: 640px) {
  .guide-table th {
    padding: 0.875rem 1.5rem;
  }
}

.guide-table tbody tr {
  border-bottom: 1px solid var(--clr-border);
  transition: background 0.15s;
}

.guide-table tbody tr:last-child {
  border-bottom: none;
}

.guide-table tbody tr:hover {
  background: rgba(19, 19, 19, 0.5);
}

.guide-table td {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

@media (min-width: 640px) {
  .guide-table td {
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
  }
}

.guide-table .rate-col {
  font-weight: 700;
  color: var(--clr-white);
}

.guide-table .interval-col {
  color: var(--clr-silver);
}

.guide-table .device-col {
  color: var(--clr-muted);
  font-family: var(--font-sans);
}

.guide-table .perf-col {
  color: var(--clr-silver);
  font-family: var(--font-sans);
}

.guide-table .row-highlight {
  background: rgba(192, 255, 107, 0.04);
}

.guide-table .row-highlight .rate-col {
  color: var(--clr-lime);
}

.guide-table .row-highlight .interval-col {
  color: var(--clr-lime);
  font-weight: 700;
}

.table-badge {
  font-size: 10px;
  font-family: var(--font-sans);
  font-weight: 700;
  background: var(--clr-lime-20);
  color: var(--clr-lime);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 0.5rem;
}

/* Nuance note */
.nuance-note {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 640px) {
  .nuance-note {
    flex-direction: row;
  }
}

.nuance-icon {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-lime);
  flex-shrink: 0;
}

.nuance-note h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.25rem;
}

.nuance-note p {
  font-size: 0.75rem;
  color: var(--clr-silver);
  line-height: 1.7;
}

@media (min-width: 640px) {
  .nuance-note p {
    font-size: 0.875rem;
  }
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.how-section {
  padding: 4rem 0;
  border-top: 1px solid var(--clr-border);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  padding: 1.5rem;
  border-radius: 8px;
  transition: border-color 0.2s;
}

.step-card:hover {
  border-color: var(--clr-border-light);
}

.step-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  color: var(--clr-lime);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-tag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--clr-muted);
}

.step-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.75rem;
  color: var(--clr-muted);
  line-height: 1.7;
}

@media (min-width: 640px) {
  .step-card p {
    font-size: 0.875rem;
  }
}

/* Technical deep dive */
.tech-deep-dive {
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.5rem;
}

@media (min-width: 640px) {
  .tech-deep-dive {
    padding: 2rem;
  }
}

.tech-deep-dive h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tech-deep-dive>p {
  font-size: 0.75rem;
  color: var(--clr-silver);
  line-height: 1.7;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .tech-deep-dive>p {
    font-size: 0.875rem;
  }
}

.code-block {
  background: var(--clr-black);
  padding: 1rem;
  border-radius: 6px;
  border: 1px solid var(--clr-border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clr-silver);
  overflow-x: auto;
  line-height: 1.8;
}

.code-comment {
  color: var(--clr-muted);
}

.code-keyword {
  color: var(--clr-lime);
}

.tech-note {
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 0.75rem;
}

/* ============================================================
   ACCURACY & LIMITATIONS
   ============================================================ */
.limitations-section {
  padding: 4rem 0;
  background: rgba(19, 19, 19, 0.5);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.warning-banner {
  padding: 1.5rem;
  border-radius: 8px;
  border: 2px solid rgba(255, 75, 75, 0.4);
  background: rgba(255, 75, 75, 0.05);
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 640px) {
  .warning-banner {
    flex-direction: row;
    align-items: flex-start;
  }
}

.warning-icon {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: rgba(255, 75, 75, 0.2);
  border: 1px solid rgba(255, 75, 75, 0.5);
  color: var(--clr-danger);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.warning-banner h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-white);
}

.warning-banner p {
  font-size: 0.75rem;
  color: var(--clr-silver);
  margin-top: 0.25rem;
  line-height: 1.7;
}

@media (min-width: 640px) {
  .warning-banner p {
    font-size: 0.875rem;
  }
}

.factors-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 1.5rem;
}

.factors-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .factors-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .factors-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.factor-card {
  background: var(--clr-card);
  padding: 1.25rem;
  border-radius: 6px;
  border: 1px solid var(--clr-border);
}

.factor-card h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--clr-lime);
  margin-bottom: 0.375rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.factor-card h4 .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-lime);
}

.factor-card p {
  font-size: 0.75rem;
  color: var(--clr-muted);
  line-height: 1.7;
}

/* ============================================================
   TIPS SECTION
   ============================================================ */
.tips-section {
  padding: 4rem 0;
}

.tips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tips-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tip-card {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem;
  border-radius: 6px;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
}

.tip-check {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--clr-charcoal);
  color: var(--clr-lime);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.tip-card h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.25rem;
}

.tip-card p {
  font-size: 0.75rem;
  color: var(--clr-muted);
  line-height: 1.7;
}

/* ============================================================
   FAQ SECTION
   ============================================================ */
.faq-section {
  padding: 4rem 0;
  background: var(--clr-charcoal);
  border-top: 1px solid var(--clr-border);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  overflow: hidden;
}

.faq-toggle {
  width: 100%;
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 600;
  color: var(--clr-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color 0.2s;
  font-size: 0.9375rem;
  cursor: pointer;
}

.faq-toggle:hover {
  color: var(--clr-lime);
}

.faq-toggle svg {
  width: 16px;
  height: 16px;
  color: var(--clr-muted);
  transition: transform 0.25s;
  flex-shrink: 0;
}

.faq-toggle.is-open svg {
  transform: rotate(180deg);
}

.faq-content {
  display: none;
  padding: 0 1.25rem 1rem;
  font-size: 0.75rem;
  color: var(--clr-silver);
  line-height: 1.8;
}

@media (min-width: 640px) {
  .faq-content {
    font-size: 0.875rem;
  }
}

.faq-content.is-open {
  display: block;
}

/* ============================================================
   PRIVACY BANNER
   ============================================================ */
.privacy-banner {
  padding: 2.5rem 0;
  background: var(--clr-black);
  border-top: 1px solid var(--clr-border);
  text-align: center;
}

.privacy-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--clr-lime);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.privacy-banner .main-text {
  font-size: 0.875rem;
  color: var(--clr-silver);
  font-weight: 500;
  max-width: 40rem;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .privacy-banner .main-text {
    font-size: 1rem;
  }
}

.privacy-banner .sub-text {
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 0.5rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  margin-top: auto;
  background: var(--clr-charcoal);
  border-top: 1px solid var(--clr-border);
  padding: 3rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.75rem;
}

.footer-logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--clr-lime-15);
  border: 1px solid var(--clr-lime-30);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-lime);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
}

.footer-brand-name {
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: -0.01em;
  font-size: 1.125rem;
}

.footer-desc {
  font-size: 0.75rem;
  color: var(--clr-muted);
  line-height: 1.7;
  max-width: 24rem;
  margin-bottom: 1rem;
}

.footer-tagline {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--clr-muted);
}

.footer-col h4 {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-white);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col li {
  font-size: 0.75rem;
}

.footer-col a,
.footer-col button {
  color: var(--clr-silver);
  transition: color 0.15s;
  font-size: 0.75rem;
  text-align: left;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}

.footer-col a:hover,
.footer-col button:hover {
  color: var(--clr-lime);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(44, 44, 44, 0.6);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.75rem;
  color: var(--clr-muted);
}

.footer-bottom .tech {
  font-family: var(--font-mono);
  font-size: 11px;
}

/* ============================================================
   LEGAL MODAL
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal-dialog {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 10px;
  max-width: 40rem;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-white);
}

.modal-close {
  padding: 0.25rem;
  border-radius: 4px;
  color: var(--clr-muted);
  transition: all 0.15s;
}

.modal-close:hover {
  color: var(--clr-white);
  background: var(--clr-charcoal);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  font-size: 0.75rem;
  color: var(--clr-silver);
  line-height: 1.8;
}

@media (min-width: 640px) {
  .modal-body {
    font-size: 0.875rem;
  }
}

.modal-body p {
  margin-bottom: 0.75rem;
}

.modal-body strong {
  color: var(--clr-white);
}

.modal-body .contact-email {
  font-family: var(--font-mono);
  color: var(--clr-lime);
}

.modal-footer {
  padding: 1rem;
  border-top: 1px solid var(--clr-border);
  display: flex;
  justify-content: flex-end;
  background: var(--clr-charcoal);
  border-radius: 0 0 10px 10px;
}

.btn-modal-close {
  padding: 0.5rem 1.25rem;
  border-radius: 4px;
  background: var(--clr-border);
  color: var(--clr-white);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background 0.15s;
  cursor: pointer;
  border: none;
}

.btn-modal-close:hover {
  background: var(--clr-border-light);
}

/* ============================================================
   SUBPAGE ARCHITECTURE & CONTENT STYLES
   ============================================================ */

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-main {
  flex: 1;
  padding-bottom: 5rem;
}

/* Breadcrumbs */
.breadcrumb-nav {
  padding: 1.5rem 0 0.5rem;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--clr-muted);
}

.breadcrumb-item a {
  color: var(--clr-silver);
  transition: color 0.15s;
  text-decoration: none;
}

.breadcrumb-item a:hover {
  color: var(--clr-lime);
}

.breadcrumb-sep {
  color: var(--clr-border-light);
}

.breadcrumb-current {
  color: var(--clr-lime);
}

/* Page Hero */
.page-hero {
  padding: 2.5rem 0 3rem;
  border-bottom: 1px solid var(--clr-border);
  background: radial-gradient(circle at 50% 0%, rgba(192, 255, 107, 0.05) 0%, transparent 70%);
  margin-bottom: 3rem;
}

.page-hero-inner {
  max-width: 52rem;
  margin: 0 auto;
  text-align: center;
}

.page-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-lime);
  background: var(--clr-lime-10);
  border: 1px solid var(--clr-lime-30);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  margin-bottom: 1.25rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .page-title {
    font-size: 2.75rem;
  }
}

.page-subtitle {
  font-size: 0.95rem;
  color: var(--clr-silver);
  line-height: 1.7;
  max-width: 44rem;
  margin: 0 auto 1.5rem;
}

@media (min-width: 640px) {
  .page-subtitle {
    font-size: 1.05rem;
  }
}

.page-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.75rem;
  color: var(--clr-muted);
}

.page-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.page-meta-item strong {
  color: var(--clr-silver);
}

/* Page Layout: Content & Sidebar */
.content-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  max-width: 56rem;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .content-layout.has-sidebar {
    grid-template-columns: 17rem 1fr;
    max-width: var(--max-w-content);
  }
}

/* Sidebar Quick Nav */
.sidebar-sticky {
  display: none;
}

@media (min-width: 1024px) {
  .sidebar-sticky {
    display: block;
    position: sticky;
    top: 6rem;
    align-self: start;
  }
}

.sidebar-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-silver);
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--clr-border);
}

.sidebar-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sidebar-nav-list a {
  display: block;
  font-size: 0.75rem;
  color: var(--clr-silver);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  transition: all 0.15s;
  text-decoration: none;
  line-height: 1.4;
}

.sidebar-nav-list a:hover {
  color: var(--clr-lime);
  background: var(--clr-lime-10);
  transform: translateX(2px);
}

/* Article Card & Typography */
.article-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-card);
}

@media (min-width: 640px) {
  .article-card {
    padding: 3rem 2.5rem;
  }
}

.article-section {
  margin-bottom: 2.5rem;
}

.article-section:last-child {
  margin-bottom: 0;
}

.article-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(44, 44, 44, 0.6);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (min-width: 640px) {
  .article-section h2 {
    font-size: 1.4rem;
  }
}

.article-section h2 .section-num {
  color: var(--clr-lime);
  font-size: 0.95rem;
  font-family: var(--font-mono);
}

.article-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-white);
  margin: 1.25rem 0 0.5rem;
}

.article-section p {
  font-size: 0.875rem;
  color: var(--clr-silver);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.article-section p:last-child {
  margin-bottom: 0;
}

.article-section strong {
  color: var(--clr-white);
}

.article-section ul,
.article-section ol {
  margin: 0.75rem 0 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--clr-silver);
  line-height: 1.7;
}

.article-section li strong {
  color: var(--clr-white);
}

/* Callout Box */
.callout-box {
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-left: 4px solid var(--clr-lime);
  border-radius: 0 8px 8px 0;
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.callout-box.warning {
  border-left-color: var(--clr-amber);
}

.callout-box.danger {
  border-left-color: var(--clr-red);
}

.callout-title {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--clr-white);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.callout-box p {
  font-size: 0.8rem;
  color: var(--clr-silver);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Comparison / Reference Table */
.reference-table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--clr-border);
  border-radius: 8px;
}

.reference-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  text-align: left;
}

.reference-table th {
  background: var(--clr-charcoal);
  color: var(--clr-silver);
  padding: 0.75rem 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.7rem;
  border-bottom: 1px solid var(--clr-border);
}

.reference-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--clr-border);
  color: var(--clr-silver);
}

.reference-table tr:last-child td {
  border-bottom: none;
}

.reference-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Contact Page Specific */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 7fr 5fr;
  }
}

.contact-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 12px;
  padding: 2rem;
}

@media (min-width: 640px) {
  .contact-card {
    padding: 2.5rem;
  }
}

.contact-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.5rem;
}

.contact-card .contact-intro {
  font-size: 0.85rem;
  color: var(--clr-silver);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--clr-silver);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.form-label .required {
  color: var(--clr-lime);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--clr-white);
  transition: all 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--clr-lime);
  box-shadow: 0 0 0 3px rgba(192, 255, 107, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--clr-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--clr-lime);
  color: var(--clr-black);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.85rem 1.75rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-lime-subtle);
  width: 100%;
}

@media (min-width: 640px) {
  .form-submit-btn {
    width: auto;
  }
}

.form-submit-btn:hover {
  background: var(--clr-lime-hover);
  box-shadow: var(--shadow-lime-glow);
  transform: translateY(-1px);
}

.form-submit-btn:active {
  transform: translateY(0);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-info-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 10px;
  padding: 1.25rem;
  transition: border-color 0.2s;
}

.contact-info-card:hover {
  border-color: var(--clr-border-light);
}

.contact-info-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.contact-info-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--clr-lime-10);
  border: 1px solid var(--clr-lime-30);
  color: var(--clr-lime);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-white);
}

.contact-info-text {
  font-size: 0.75rem;
  color: var(--clr-silver);
  line-height: 1.6;
}

.contact-info-link {
  color: var(--clr-lime);
  text-decoration: none;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.8rem;
  display: inline-block;
  margin-top: 0.35rem;
}

.contact-info-link:hover {
  text-decoration: underline;
}

.form-success-banner {
  display: none;
  background: var(--clr-lime-10);
  border: 1px solid var(--clr-lime-30);
  color: var(--clr-white);
  padding: 1rem 1.25rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  line-height: 1.5;
}

.form-success-banner.is-visible {
  display: block;
}

/* About Us Page Specific */
.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .about-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.about-stat-card {
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}

.about-stat-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--clr-lime);
  font-family: var(--font-mono);
  margin-bottom: 0.25rem;
}

.about-stat-label {
  font-size: 0.7rem;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about-values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
}

@media (min-width: 768px) {
  .about-values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.value-card {
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.value-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: var(--clr-lime-10);
  border: 1px solid var(--clr-lime-30);
  color: var(--clr-lime);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.value-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.4rem;
}

.value-desc {
  font-size: 0.8rem;
  color: var(--clr-silver);
  line-height: 1.6;
}

.return-cta-banner {
  margin-top: 3rem;
  background: radial-gradient(circle at 50% 50%, rgba(192, 255, 107, 0.08) 0%, rgba(22, 22, 22, 0.8) 100%);
  border: 1px solid var(--clr-lime-30);
  border-radius: 12px;
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.return-cta-banner h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-white);
  margin-bottom: 0.5rem;
}

.return-cta-banner p {
  font-size: 0.875rem;
  color: var(--clr-silver);
  max-width: 32rem;
  margin: 0 auto 1.5rem;
}

/* ============================================================
   KNOWLEDGE BASE & GUIDE CONTENT STYLES
   ============================================================ */
.guide-content-wrapper {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.guide-block {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s;
}

@media (min-width: 640px) {
  .guide-block {
    padding: 2.5rem 2rem;
  }
}

.guide-block:hover {
  border-color: var(--clr-border-light);
}

.guide-block-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(44, 44, 44, 0.6);
}

.guide-block-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: var(--clr-lime-10);
  border: 1px solid var(--clr-lime-30);
  color: var(--clr-lime);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.guide-block h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  margin: 0;
}

@media (min-width: 640px) {
  .guide-block h3 {
    font-size: 1.4rem;
  }
}

.guide-block p {
  font-size: 0.875rem;
  color: var(--clr-silver);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.guide-block p:last-child {
  margin-bottom: 0;
}

.guide-block strong {
  color: var(--clr-white);
}

.guide-steps-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.25rem 0 1.5rem;
}

@media (min-width: 640px) {
  .guide-steps-container {
    grid-template-columns: 1fr 1fr;
  }
}

.guide-step-card {
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.guide-step-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.guide-step-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--clr-lime);
  background: var(--clr-lime-15);
  border: 1px solid var(--clr-lime-30);
  padding: 2px 8px;
  border-radius: 4px;
}

.guide-step-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-white);
}

.guide-features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.25rem;
}

@media (min-width: 640px) {
  .guide-features-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.guide-feature-item {
  background: var(--clr-charcoal);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.guide-feature-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.guide-feature-item h4 .feature-check {
  color: var(--clr-lime);
}

.guide-feature-item p {
  font-size: 0.8rem;
  color: var(--clr-silver);
  line-height: 1.6;
  margin-bottom: 0;
}