:root {
    --black: #060608;
    --deep: #0a0b10;
    --surface: #10121a;
    --card: #14161f;
    --border: #1e2230;
    --blue: #2563eb;
    --blue-bright: #3b82f6;
    --blue-glow: #60a5fa;
    --blue-dim: #1d4ed8;
    --white: #f0f2ff;
    --white-dim: #8892aa;
    --white-faint: #2a2d3e;
    --red: #ef4444;
    --green: #10b981;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }

  body {
    font-family: 'DM Sans', sans-serif;
    background: var(--black);
    color: var(--white);
    overflow-x: hidden;
    cursor: none;
  }

  /* CUSTOM CURSOR */
  .cursor {
    position: fixed;
    width: 10px; height: 10px;
    background: var(--blue-bright);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background 0.2s;
    mix-blend-mode: screen;
  }
  .cursor-ring {
    position: fixed;
    width: 36px; height: 36px;
    border: 1px solid rgba(59,130,246,0.5);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: all 0.12s ease;
  }
  body:has(button:hover) .cursor { width: 18px; height: 18px; background: var(--white); }
  body:has(button:hover) .cursor-ring { width: 50px; height: 50px; border-color: var(--white); }

  /* NOISE OVERLAY */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1000;
    opacity: 0.4;
  }

  /* SCANLINES */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.03) 2px, rgba(0,0,0,0.03) 4px);
    pointer-events: none;
    z-index: 999;
  }

  /* ANIMATED BG */
  .bg-grid {
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(37,99,235,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(37,99,235,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridDrift 20s linear infinite;
    pointer-events: none;
  }
  @keyframes gridDrift {
    0% { transform: translateY(0); }
    100% { transform: translateY(60px); }
  }

  .bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    animation: orbFloat 12s ease-in-out infinite;
  }
  .bg-orb-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(37,99,235,0.12) 0%, transparent 70%);
    top: -100px; left: -100px;
  }
  .bg-orb-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, transparent 70%);
    bottom: -50px; right: -50px;
    animation-delay: -6s;
  }
  @keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 30px) scale(0.95); }
  }

  /* PAGES */
  .page {
    min-height: 100vh;
    position: relative;
    z-index: 10;
    display: none;
    animation: fadeIn 0.6s ease forwards;
  }
  .page.active { display: flex; flex-direction: column; }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* HEADER */
  .site-header {
    padding: 32px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
  }

  .logo-wrap { display: flex; align-items: center; gap: 16px; }

  .iv-logo {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 20px;
    letter-spacing: 1px;
    color: var(--white);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 4px;
    line-height: 1;
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s;
  }
  .iv-logo::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37,99,235,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
  }
  .iv-logo:hover { border-color: var(--blue-bright); }
  .iv-logo:hover::before { opacity: 1; }

  .logo-divider { width: 1px; height: 20px; background: var(--border); }

  .logo {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 22px;
    letter-spacing: 3px;
    color: var(--blue-glow);
  }

  .step-indicator {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    color: var(--white-dim);
    letter-spacing: 2px;
  }

  /* PAGE 1 */
  .hero-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 48px;
    text-align: center;
  }

  .eyebrow {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--blue-bright);
    text-transform: uppercase;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeIn 0.8s 0.2s forwards;
  }

  h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(52px, 8vw, 96px);
    line-height: 0.9;
    letter-spacing: 2px;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeIn 0.8s 0.4s forwards;
  }
  h1 .accent {
    color: var(--blue-bright);
    position: relative;
    display: inline-block;
  }
  h1 .accent::after {
    content: '';
    position: absolute;
    bottom: 4px; left: 0; right: 0;
    height: 3px;
    background: var(--blue-bright);
    animation: underlineGrow 1s 1.2s both;
    transform-origin: left;
  }
  @keyframes underlineGrow {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
  }

  .subtitle {
    font-size: 16px;
    color: var(--white-dim);
    max-width: 500px;
    line-height: 1.7;
    margin-bottom: 64px;
    opacity: 0;
    animation: fadeIn 0.8s 0.6s forwards;
  }

  /* PLATFORM GRID */
  .platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    max-width: 900px;
    width: 100%;
    opacity: 0;
    animation: fadeIn 0.8s 0.8s forwards;
  }

  .platform-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px 16px;
    cursor: none;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
  }
  .platform-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(59,130,246,0.12), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
  }
  .platform-card:hover::before,
  .platform-card.selected::before { opacity: 1; }
  .platform-card:hover {
    border-color: var(--blue-dim);
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(37,99,235,0.2);
  }
  .platform-card.selected {
    border-color: var(--blue-bright);
    background: rgba(37,99,235,0.12);
    box-shadow: 0 0 0 1px var(--blue-bright), 0 8px 32px rgba(37,99,235,0.3);
  }

  .platform-icon { font-size: 28px; transition: transform 0.3s; }
  .platform-card:hover .platform-icon,
  .platform-card.selected .platform-icon { transform: scale(1.15); }

  .platform-name { font-size: 12px; font-weight: 500; letter-spacing: 0.5px; }
  .platform-arpu { font-family: 'Space Mono', monospace; font-size: 9px; color: var(--white-dim); }

  .check-mark {
    position: absolute;
    top: 8px; right: 8px;
    width: 18px; height: 18px;
    background: var(--blue-bright);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    opacity: 0;
    transform: scale(0);
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  }
  .platform-card.selected .check-mark { opacity: 1; transform: scale(1); }

  /* BUTTONS */
  .cta-wrap {
    margin-top: 48px;
    opacity: 0;
    animation: fadeIn 0.8s 1s forwards;
  }

  .btn-primary {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 18px;
    letter-spacing: 3px;
    background: var(--blue);
    color: var(--white);
    border: none;
    padding: 18px 56px;
    border-radius: 4px;
    cursor: none;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
  }
  .btn-primary::before {
    content: '';
    position: absolute;
    top: 50%; left: -100%;
    width: 100%; height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
    transform: translateY(-50%) skewX(-20deg);
    transition: left 0.5s;
  }
  .btn-primary:hover::before { left: 200%; }
  .btn-primary:hover {
    background: var(--blue-bright);
    box-shadow: 0 0 40px rgba(59,130,246,0.5);
    transform: translateY(-2px);
  }
  .btn-primary:disabled { opacity: 0.3; cursor: not-allowed; transform: none; box-shadow: none; }

  .selection-count {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    color: var(--white-dim);
    margin-top: 16px;
    letter-spacing: 1px;
    transition: color 0.3s;
  }
  .selection-count.has-selection { color: var(--blue-glow); }

  /* PAGE 2 */
  .input-section {
    flex: 1;
    max-width: 820px;
    margin: 0 auto;
    padding: 60px 48px;
    width: 100%;
  }

  .page2-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(36px, 5vw, 56px);
    line-height: 1;
    margin-bottom: 8px;
    opacity: 0;
    animation: fadeIn 0.6s 0.1s forwards;
  }

  .page2-sub {
    color: var(--white-dim);
    font-size: 14px;
    margin-bottom: 48px;
    opacity: 0;
    animation: fadeIn 0.6s 0.2s forwards;
  }

  .platform-inputs-container { display: flex; flex-direction: column; gap: 16px; margin-bottom: 48px; }

  .platform-input-row {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px 24px;
    opacity: 0;
    animation: slideIn 0.5s forwards;
    transition: border-color 0.3s;
  }
  .platform-input-row:hover { border-color: var(--white-faint); }

  @keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
  }

  .pir-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
  .pir-icon { font-size: 22px; }
  .pir-name { font-weight: 500; font-size: 15px; flex: 1; }
  .pir-hint { font-family: 'Space Mono', monospace; font-size: 10px; color: var(--white-dim); letter-spacing: 1px; }

  .pir-fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .field-wrap { display: flex; flex-direction: column; gap: 6px; }
  .field-label { font-size: 11px; color: var(--white-dim); letter-spacing: 0.5px; }
  .field-label span { color: var(--blue-glow); font-family: 'Space Mono', monospace; font-size: 10px; }

  input[type="number"] {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--white);
    font-family: 'Space Mono', monospace;
    font-size: 14px;
    padding: 10px 14px;
    width: 100%;
    outline: none;
    transition: all 0.25s;
    -moz-appearance: textfield;
    cursor: none;
  }
  input[type="number"]::-webkit-inner-spin-button,
  input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
  input[type="number"]:focus {
    border-color: var(--blue-bright);
    background: rgba(37,99,235,0.08);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
  }
  input[type="number"]::placeholder { color: var(--white-faint); }

  .nav-buttons { display: flex; gap: 16px; align-items: center; }

  .btn-secondary {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    letter-spacing: 2px;
    background: transparent;
    color: var(--white-dim);
    border: 1px solid var(--border);
    padding: 14px 28px;
    border-radius: 4px;
    cursor: none;
    transition: all 0.3s;
  }
  .btn-secondary:hover { border-color: var(--white-dim); color: var(--white); }

  /* PAGE 3 */
  .results-section {
    flex: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 48px;
    width: 100%;
  }

  .results-hero { text-align: center; margin-bottom: 64px; }

  .total-display {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(72px, 14vw, 160px);
    line-height: 0.85;
    color: var(--blue-bright);
    letter-spacing: -2px;
    position: relative;
    display: inline-block;
  }
  .total-display::after {
    content: '';
    position: absolute;
    bottom: -8px; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
  }

  .total-label {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--white-dim);
    margin-top: 24px;
    text-transform: uppercase;
  }
  .total-sublabel { font-size: 14px; color: var(--white-dim); margin-top: 8px; }

  .stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 48px; }

  .stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    position: relative;
    overflow: hidden;
    opacity: 0;
    animation: fadeIn 0.6s forwards;
    transition: transform 0.3s, border-color 0.3s;
  }
  .stat-card:hover { transform: translateY(-4px); border-color: var(--blue-dim); }
  .stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--blue-dim), var(--blue-glow));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s ease;
  }
  .stat-card:hover::before { transform: scaleX(1); }

  .stat-value { font-family: 'Bebas Neue', sans-serif; font-size: 36px; color: var(--white); line-height: 1; margin-bottom: 6px; }
  .stat-value.highlight { color: var(--blue-bright); }
  .stat-value.warn { color: var(--red); }
  .stat-desc { font-size: 12px; color: var(--white-dim); line-height: 1.5; }

  .breakdown-title { font-family: 'Bebas Neue', sans-serif; font-size: 28px; letter-spacing: 2px; margin-bottom: 20px; color: var(--white-dim); }
  .breakdown-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 48px; }

  .breakdown-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    opacity: 0;
    animation: slideIn 0.5s forwards;
    transition: border-color 0.3s;
  }
  .breakdown-item:hover { border-color: var(--blue-dim); }
  .bi-icon { font-size: 20px; width: 28px; text-align: center; }
  .bi-name { font-weight: 500; font-size: 14px; flex: 1; }
  .bi-bar-wrap { flex: 2; height: 6px; background: var(--white-faint); border-radius: 3px; overflow: hidden; }
  .bi-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--blue-dim), var(--blue-glow));
    border-radius: 3px;
    transform: scaleX(0);
    transform-origin: left;
    animation: barGrow 1s 0.5s cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
  }
  @keyframes barGrow { to { transform: scaleX(1); } }
  .bi-amount { font-family: 'Space Mono', monospace; font-size: 13px; color: var(--blue-glow); min-width: 80px; text-align: right; }

  .context-section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 48px;
    position: relative;
    overflow: hidden;
  }
  .context-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
  }
  .context-title { font-family: 'Bebas Neue', sans-serif; font-size: 22px; letter-spacing: 2px; margin-bottom: 20px; color: var(--white-dim); }
  .context-items { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .context-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px;
    background: var(--surface);
    border-radius: 10px;
    font-size: 13px;
    color: var(--white-dim);
    line-height: 1.5;
  }
  .context-item .ci-icon { font-size: 18px; margin-top: 1px; flex-shrink: 0; }
  .context-item strong { color: var(--white); display: block; }

  .actions-row { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

  .btn-share {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 16px;
    letter-spacing: 3px;
    background: transparent;
    color: var(--blue-glow);
    border: 1px solid var(--blue-dim);
    padding: 16px 40px;
    border-radius: 4px;
    cursor: none;
    transition: all 0.3s;
  }
  .btn-share:hover {
    background: rgba(37,99,235,0.15);
    border-color: var(--blue-bright);
    box-shadow: 0 0 24px rgba(37,99,235,0.2);
  }

/* ===== FOOTER ===== */

footer {
  margin-top: 100px;
  padding: 60px 0 40px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 30px;
}

.footer-links a {
  text-decoration: none;
  color: inherit;
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.footer-links a:hover {
  opacity: 1;
  color: #e8f542;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 0;
  align-items: center;
}

.footer-links a:not(:last-child)::after {
  content: '|';
  margin: 0 0.6em;
  opacity: 0.3;
  color: inherit;
}


  /* TICKER */
  .ticker-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: rgba(6,6,8,0.9);
    border-top: 1px solid var(--border);
    padding: 10px 0;
    overflow: hidden;
    z-index: 100;
    backdrop-filter: blur(10px);
  }
  .ticker-content {
    display: flex;
    animation: tickerScroll 40s linear infinite;
    white-space: nowrap;
  }
  .ticker-item { font-family: 'Space Mono', monospace; font-size: 10px; color: var(--white-dim); padding: 0 48px; letter-spacing: 1px; }
  .ticker-item .pos { color: var(--blue-glow); }
  .ticker-item .neg { color: var(--red); }
  @keyframes tickerScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
  }

  /* GLITCH */
  .glitch { position: relative; }
  .glitch::before, .glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    font-family: 'Bebas Neue', sans-serif;
  }
  .glitch::before {
    color: var(--blue-bright);
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    animation: glitch1 4s infinite;
    opacity: 0;
  }
  .glitch::after {
    color: #ff2244;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    animation: glitch2 4s infinite;
    opacity: 0;
  }
  @keyframes glitch1 {
    0%, 90%, 100% { transform: translate(0); opacity: 0; }
    92% { transform: translate(-3px, 1px); opacity: 0.7; }
    94% { transform: translate(3px, -1px); opacity: 0.7; }
    96% { transform: translate(-2px, 2px); opacity: 0; }
  }
  @keyframes glitch2 {
    0%, 90%, 100% { transform: translate(0); opacity: 0; }
    93% { transform: translate(3px, 1px); opacity: 0.7; }
    95% { transform: translate(-3px, -1px); opacity: 0.7; }
    97% { transform: translate(2px, 2px); opacity: 0; }
  }

  /* RESPONSIVE */
  @media (max-width: 768px) {
    .site-header, .hero-section, .input-section, .results-section { padding: 24px 20px; }
    .pir-fields { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .context-items { grid-template-columns: 1fr; }
    .platforms-grid { grid-template-columns: repeat(3, 1fr); }
    h1 { font-size: 48px; }
    .total-display { font-size: 80px; }
  }
    
   /* Cursor position via CSS variables */
  #cursor     { left: var(--cx, -100px); top: var(--cy, -100px); }
  #cursorRing { left: var(--rx, -100px); top: var(--ry, -100px); }
 
  /* Animation delays via --i */
  .platform-card      { animation-delay: calc(var(--i, 0) * 0.05s); }
  .platform-input-row { animation-delay: calc(var(--i, 0) * 0.08s); }
  .stat-card          { animation-delay: calc(var(--i, 0) * 0.15s); }
  .breakdown-item     { animation-delay: calc(var(--i, 0) * 0.08s); }
 
  /* Bar width via --pct */
  .bi-bar { width: var(--pct, 0%); }
 
  /* Validation error via class */
  .platform-input-row.has-error {
    border-color: var(--red) !important;
    animation: none !important;
  }
 
  /* Page 2 title accent */
  .page2-title .accent { color: var(--blue-bright); }
 
  /* Page 3 eyebrow — no animation */
  .eyebrow.no-anim { animation: none; opacity: 1; }