:root {
    --blue:    #6EC1E4;
    --green:   #61CE70;
    --purple:  #7054D4;
    --cyan:    #00F0FF;
    --slate:   #54595F;
    --gray:    #7A7A7A;
    --dark:    #0D1117;
    --dark2:   #161B22;
    --dark3:   #1E2530;
    --white:   #FFFFFF;
    --off:     #F5F9FC;
    --lgray:   #F0F4F8;
    --border:  #E2E8F0;
    --font-display: 'Roboto Slab', serif;
    --font-body:    'Roboto', sans-serif;
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: var(--font-body);
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
  }

  /* ── NAV ───────────────────────────────────────────────────── */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(13,17,23,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(110,193,228,0.15);
    padding: 0 40px;
    height: 64px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .nav-logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    color: var(--white);
    text-decoration: none;
    letter-spacing: -0.02em;
    display: flex; align-items: center; gap: 10px;
  }
  .nav-logo-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--blue);
    box-shadow: 0 0 12px var(--blue);
    flex-shrink: 0;
  }
  .nav-links {
    display: flex; align-items: center; gap: 32px; list-style: none;
  }
  .nav-links a {
    color: rgba(255,255,255,0.65);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: color 0.2s;
  }
  .nav-links a:hover { color: var(--blue); }
  .nav-cta {
    background: var(--blue);
    color: var(--dark) !important;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 700 !important;
    transition: background 0.2s, box-shadow 0.2s !important;
  }
  .nav-cta:hover { background: #5BB3D6 !important; box-shadow: 0 0 20px rgba(110,193,228,0.4) !important; }

  /* ── HERO ──────────────────────────────────────────────────── */
  #hero {
    min-height: 100vh;
    background: var(--dark);
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
    padding: 120px 40px 80px;
  }
  .hero-glow {
    position: absolute; border-radius: 50%; filter: blur(120px); pointer-events: none;
  }
  .hero-glow-1 {
    width: 600px; height: 600px;
    background: rgba(110,193,228,0.12);
    top: -100px; left: -100px;
    animation: pulse1 6s ease-in-out infinite;
  }
  .hero-glow-2 {
    width: 500px; height: 500px;
    background: rgba(112,84,212,0.10);
    bottom: -100px; right: -50px;
    animation: pulse2 8s ease-in-out infinite;
  }
  .hero-glow-3 {
    width: 300px; height: 300px;
    background: rgba(97,206,112,0.08);
    top: 50%; right: 20%;
    animation: pulse3 5s ease-in-out infinite;
  }
  @keyframes pulse1 { 0%,100%{opacity:0.6;transform:scale(1)} 50%{opacity:1;transform:scale(1.1)} }
  @keyframes pulse2 { 0%,100%{opacity:0.5;transform:scale(1)} 50%{opacity:0.9;transform:scale(1.05)} }
  @keyframes pulse3 { 0%,100%{opacity:0.4;transform:scale(1)} 50%{opacity:0.8;transform:scale(1.15)} }

  /* grid lines */
  .hero-grid {
    position: absolute; inset: 0; pointer-events: none;
    background-image:
      linear-gradient(rgba(110,193,228,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(110,193,228,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
  }

  .hero-inner {
    position: relative; z-index: 1;
    max-width: 860px; text-align: center;
  }
  .hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(110,193,228,0.1);
    border: 1px solid rgba(110,193,228,0.25);
    border-radius: 100px;
    padding: 6px 16px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--blue);
    text-transform: uppercase;
    margin-bottom: 28px;
  }
  .eyebrow-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
    flex-shrink: 0;
  }
  .hero-h1 {
    font-family: var(--font-display);
    font-size: clamp(38px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.03em;
    color: var(--white);
    margin-bottom: 24px;
  }
  .hero-h1 span.accent-blue { color: var(--blue); }
  .hero-h1 span.accent-green { color: var(--green); }

  .hero-sub {
    font-size: 17px;
    color: rgba(255,255,255,0.6);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
    font-weight: 300;
  }
  .hero-actions {
    display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  }
  .btn-primary {
    background: var(--blue);
    color: var(--dark);
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    border: none; cursor: pointer;
    transition: box-shadow 0.25s, transform 0.15s;
    letter-spacing: 0.01em;
  }
  .btn-primary:hover { box-shadow: 0 0 28px rgba(110,193,228,0.5); transform: translateY(-1px); }
  .btn-ghost {
    background: transparent;
    color: rgba(255,255,255,0.7);
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.18);
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
  }
  .btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

  .hero-stats {
    margin-top: 72px;
    display: flex; gap: 0; justify-content: center;
    border: 1px solid rgba(110,193,228,0.15);
    border-radius: 12px;
    overflow: hidden;
    background: rgba(255,255,255,0.02);
  }
  .hero-stat {
    flex: 1; padding: 22px 28px;
    border-right: 1px solid rgba(110,193,228,0.12);
    text-align: center;
  }
  .hero-stat:last-child { border-right: none; }
  .stat-num {
    font-family: var(--font-display);
    font-size: 28px; font-weight: 700;
    color: var(--white);
    line-height: 1;
    margin-bottom: 4px;
  }
  .stat-num span { color: var(--blue); }
  .stat-label { font-size: 11px; color: rgba(255,255,255,0.4); letter-spacing: 0.05em; font-weight: 500; }

  /* ── SECTIONS SHARED ───────────────────────────────────────── */
  section { padding: 100px 40px; }
  .container { max-width: 1100px; margin: 0 auto; }
  .section-eyebrow {
    font-size: 11px; font-weight: 600; letter-spacing: 0.12em;
    text-transform: uppercase; margin-bottom: 14px;
    display: flex; align-items: center; gap: 10px;
  }
  .section-eyebrow::before {
    content: ''; display: block;
    width: 24px; height: 2px;
    background: currentColor;
    border-radius: 2px;
  }
  .section-h2 {
    font-family: var(--font-display);
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin-bottom: 16px;
  }
  .section-sub {
    font-size: 16px; color: var(--gray);
    max-width: 560px; line-height: 1.7;
    font-weight: 300;
  }
  .section-header { margin-bottom: 56px; }

  /* ── PROBLEM ───────────────────────────────────────────────── */
  #problem { background: var(--off); }
  .problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
  }
  .problem-card {
    background: var(--white);
    padding: 36px 30px;
    position: relative;
  }
  .problem-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
  }
  .problem-card:nth-child(1)::before { background: var(--blue); }
  .problem-card:nth-child(2)::before { background: var(--purple); }
  .problem-card:nth-child(3)::before { background: var(--green); }
  .problem-icon {
    font-size: 28px; margin-bottom: 16px; display: block;
  }
  .problem-h3 {
    font-family: var(--font-display);
    font-size: 17px; font-weight: 600;
    margin-bottom: 10px; letter-spacing: -0.01em;
  }
  .problem-p { font-size: 14px; color: var(--gray); line-height: 1.7; }

  /* ── MODULES ───────────────────────────────────────────────── */
  #modules { background: var(--white); }
  .modules-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .module-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: box-shadow 0.25s, transform 0.15s, border-color 0.25s;
    background: var(--white);
    display: flex;
    flex-direction: column;
  }
  .module-card:hover {
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
    transform: translateY(-2px);
  }
  .module-top {
    padding: 20px 20px 14px;
    flex: 1;
  }
  .module-tag {
    display: inline-block;
    font-size: 10px; font-weight: 600;
    letter-spacing: 0.07em; text-transform: uppercase;
    padding: 3px 9px; border-radius: 20px;
    margin-bottom: 12px;
  }
  .tag-seo    { background: #E6F1FB; color: #0C447C; }
  .tag-brand  { background: #EAF3DE; color: #27500A; }
  .tag-rev    { background: #EEEDFE; color: #3C3489; }
  .tag-tech   { background: #E1F5EE; color: #085041; }
  .tag-ai     { background: #EEEDFE; color: #3C3489; }
  .tag-ops    { background: #EAF3DE; color: #27500A; }
  .tag-web    { background: #FAEEDA; color: #633806; }
  .tag-data   { background: #E6F1FB; color: #0C447C; }
  .module-name {
    font-family: var(--font-display);
    font-size: 14px; font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
  }
  .module-desc { font-size: 12px; color: var(--gray); line-height: 1.65; }
  .module-bottom {
    padding: 12px 20px 16px;
    border-top: 1px solid var(--border);
    background: var(--off);
  }
  .module-price-label { font-size: 10px; color: var(--gray); letter-spacing: 0.05em; margin-bottom: 2px; }
  .module-price { font-size: 20px; font-weight: 600; color: var(--dark); }
  .module-price-period { font-size: 11px; color: var(--gray); font-weight: 400; margin-left: 2px; }
  .module-retainer { font-size: 11px; color: var(--gray); margin-top: 3px; }

  /* ── PRICING ───────────────────────────────────────────────── */
  #pricing { background: var(--lgray); }
  .pricing-packages {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
  }
  .pkg {
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    background: var(--white);
    transition: transform 0.2s, box-shadow 0.2s;
  }
  .pkg:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,0.08); }
  .pkg-popular {
    border: 2px solid var(--blue);
    position: relative;
  }
  .popular-badge {
    position: absolute; top: -1px; left: 50%; transform: translateX(-50%);
    background: var(--blue); color: var(--dark);
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase;
    padding: 4px 16px;
    border-radius: 0 0 8px 8px;
  }
  .pkg-inner { padding: 28px 26px; }
  .pkg-label { font-size: 10px; font-weight: 600; color: var(--gray); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 6px; }
  .pkg-name { font-family: var(--font-display); font-size: 22px; font-weight: 700; margin-bottom: 4px; letter-spacing: -0.02em; }
  .pkg-price { font-size: 36px; font-weight: 500; margin: 12px 0 4px; letter-spacing: -0.02em; }
  .pkg-price sup { font-size: 18px; vertical-align: super; line-height: 0; margin-right: 2px; color: var(--gray); }
  .pkg-tagline { font-size: 12px; color: var(--gray); margin-bottom: 20px; line-height: 1.6; }
  .pkg-divider { height: 1px; background: var(--border); margin: 18px 0; }
  .pkg-includes-label { font-size: 11px; font-weight: 600; color: var(--slate); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 10px; }
  .pkg-module-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }
  .pkg-module-list li {
    font-size: 12.5px; color: var(--slate);
    display: flex; align-items: center; gap: 8px;
  }
  .pkg-module-list li::before {
    content: ''; display: block;
    width: 5px; height: 5px;
    border-radius: 50%;
    flex-shrink: 0;
  }
  .pkg-starter li::before { background: var(--gray); }
  .pkg-growth  li::before { background: var(--purple); }
  .pkg-full    li::before { background: var(--blue); }
  .pkg-save { font-size: 11px; font-weight: 600; color: var(--green); margin-top: 6px; }
  .pkg-btn {
    display: block; text-align: center; margin-top: 22px;
    padding: 11px; border-radius: 8px;
    font-size: 13px; font-weight: 600; text-decoration: none;
    transition: 0.2s;
    cursor: pointer; border: none;
  }
  .pkg-btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--slate);
  }
  .pkg-btn-outline:hover { border-color: var(--blue); color: var(--blue); }
  .pkg-btn-solid {
    background: var(--blue);
    color: var(--dark);
  }
  .pkg-btn-solid:hover { box-shadow: 0 0 20px rgba(110,193,228,0.45); }

  /* Retainer box */
  .retainer-section {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 26px 28px;
  }
  .retainer-label { font-size: 12px; font-weight: 600; color: var(--slate); letter-spacing: 0.07em; text-transform: uppercase; margin-bottom: 16px; }
  .retainer-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  }
  .retainer-item {
    text-align: center; padding: 16px;
    border: 1px solid var(--border); border-radius: 8px;
    background: var(--off);
  }
  .retainer-price { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 4px; }
  .retainer-name { font-size: 11px; color: var(--gray); font-weight: 500; }
  .retainer-desc { font-size: 11px; color: var(--gray); margin-top: 4px; line-height: 1.5; }
  .pricing-note { font-size: 11.5px; color: var(--gray); margin-top: 18px; line-height: 1.7; text-align: center; }

  /* ── CASE STUDY ────────────────────────────────────────────── */
  #case-study { background: var(--dark); color: var(--white); }
  #case-study .section-eyebrow { color: var(--blue); }
  #case-study .section-h2 { color: var(--white); }
  #case-study .section-sub { color: rgba(255,255,255,0.55); }

  .case-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
  }
  .case-property-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(110,193,228,0.1);
    border: 1px solid rgba(110,193,228,0.2);
    border-radius: 8px;
    padding: 10px 16px;
    margin-bottom: 28px;
  }
  .case-property-logo {
    font-family: var(--font-display);
    font-size: 15px; font-weight: 700;
    color: var(--white);
    letter-spacing: -0.01em;
  }
  .case-property-sub {
    font-size: 11px; color: rgba(255,255,255,0.5);
    margin-top: 1px;
  }
  .case-desc {
    font-size: 15px; color: rgba(255,255,255,0.65);
    line-height: 1.75; margin-bottom: 28px;
    font-weight: 300;
  }
  .case-stack {
    display: flex; flex-wrap: wrap; gap: 8px;
  }
  .stack-pill {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 11px; color: rgba(255,255,255,0.55);
    font-weight: 500;
  }
  .case-deliverables {
    display: flex; flex-direction: column; gap: 14px;
  }
  .deliverable {
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 10px;
    padding: 18px 20px;
    display: flex; gap: 16px; align-items: flex-start;
  }
  .deliverable-icon {
    width: 34px; height: 34px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px; flex-shrink: 0;
  }
  .deliverable-icon.blue   { background: rgba(110,193,228,0.15); }
  .deliverable-icon.green  { background: rgba(97,206,112,0.15); }
  .deliverable-icon.purple { background: rgba(112,84,212,0.15); }
  .deliverable-icon.cyan   { background: rgba(0,240,255,0.1); }
  .deliverable-title {
    font-size: 13.5px; font-weight: 600;
    color: var(--white); margin-bottom: 4px;
    letter-spacing: -0.01em;
  }
  .deliverable-desc { font-size: 12px; color: rgba(255,255,255,0.45); line-height: 1.6; }

  .case-results {
    margin-top: 32px;
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 10px; overflow: hidden;
  }
  .result-item {
    background: var(--dark2);
    padding: 20px 16px; text-align: center;
  }
  .result-num {
    font-family: var(--font-display);
    font-size: 26px; font-weight: 700;
    color: var(--white); line-height: 1;
    margin-bottom: 4px;
  }
  .result-num em { color: var(--blue); font-style: normal; }
  .result-label { font-size: 11px; color: rgba(255,255,255,0.4); line-height: 1.4; }

  /* ── PROCESS ───────────────────────────────────────────────── */
  #process { background: var(--white); }
  .process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
  }
  .process-steps::after {
    content: '';
    position: absolute;
    top: 38px; left: 12%; right: 12%;
    height: 1.5px;
    background: linear-gradient(90deg, var(--blue), var(--purple), var(--green));
    z-index: 0;
  }
  .process-step {
    text-align: center; padding: 0 20px;
    position: relative; z-index: 1;
  }
  .step-num-wrap {
    width: 76px; height: 76px; border-radius: 50%;
    margin: 0 auto 20px;
    background: var(--dark);
    display: flex; align-items: center; justify-content: center;
    border: 1.5px solid;
    position: relative;
  }
  .step-num-wrap:nth-child(1) { border-color: var(--blue); }
  .process-step:nth-child(1) .step-num-wrap { border-color: var(--blue); }
  .process-step:nth-child(2) .step-num-wrap { border-color: var(--purple); }
  .process-step:nth-child(3) .step-num-wrap { border-color: var(--cyan); }
  .process-step:nth-child(4) .step-num-wrap { border-color: var(--green); }
  .step-num {
    font-family: var(--font-display);
    font-size: 22px; font-weight: 700;
    color: var(--white);
  }
  .step-title {
    font-family: var(--font-display);
    font-size: 15px; font-weight: 600;
    margin-bottom: 8px; letter-spacing: -0.01em;
  }
  .step-desc { font-size: 13px; color: var(--gray); line-height: 1.65; }

  /* ── CTA ───────────────────────────────────────────────────── */
  #cta {
    background: var(--dark);
    text-align: center;
    padding: 100px 40px;
    position: relative; overflow: hidden;
  }
  #cta::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(110,193,228,0.08) 0%, transparent 70%);
    pointer-events: none;
  }
  .cta-inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
  .cta-h2 {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 700; color: var(--white);
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
  }
  .cta-h2 span { color: var(--blue); }
  .cta-sub { font-size: 16px; color: rgba(255,255,255,0.5); margin-bottom: 36px; line-height: 1.7; font-weight: 300; }
  .cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

  /* ── FOOTER ────────────────────────────────────────────────── */
  footer {
    background: var(--dark2);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 32px 40px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .footer-logo {
    font-family: var(--font-display);
    font-size: 15px; font-weight: 700;
    color: rgba(255,255,255,0.7);
    display: flex; align-items: center; gap: 8px;
  }
  .footer-copy { font-size: 12px; color: rgba(255,255,255,0.3); }
  .footer-url { font-size: 12px; color: rgba(110,193,228,0.6); }

  /* ── RESPONSIVE ────────────────────────────────────────────── */
  @media (max-width: 900px) {
    nav { padding: 0 20px; }
    .nav-links { display: none; }
    section { padding: 70px 20px; }
    .problem-grid { grid-template-columns: 1fr; }
    .modules-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-packages { grid-template-columns: 1fr; }
    .retainer-grid { grid-template-columns: 1fr; }
    .case-layout { grid-template-columns: 1fr; gap: 40px; }
    .case-results { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: 1fr 1fr; }
    .process-steps::after { display: none; }
    footer { flex-direction: column; gap: 8px; text-align: center; }
    .hero-stats { flex-direction: column; }
    .hero-stat { border-right: none; border-bottom: 1px solid rgba(110,193,228,0.12); }
    .hero-stat:last-child { border-bottom: none; }
  }

/* ── CALCULATOR ──────────────────────────────────────────── */
    .scenario-btn {
      background: transparent; border: none; cursor: pointer;
      padding: 8px 20px; border-radius: 7px;
      font-size: 13px; font-weight: 500;
      color: rgba(255,255,255,0.45);
      font-family: var(--font-body);
      transition: background 0.2s, color 0.2s;
    }
    .scenario-btn.active {
      background: var(--blue); color: var(--dark); font-weight: 700;
    }
    .calc-card {
      background: var(--dark2);
      border: 1px solid rgba(255,255,255,0.07);
      border-radius: 12px;
      padding: 20px 22px;
    }
    .calc-card-label {
      font-size: 11px; font-weight: 600;
      color: rgba(255,255,255,0.35);
      letter-spacing: 0.1em; text-transform: uppercase;
      margin-bottom: 16px;
    }
    .calc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 14px; align-items: stretch; }
    .calc-row:last-child { margin-bottom: 0; }
    .calc-field { display: flex; flex-direction: column; justify-content: space-between; gap: 6px; }
    .calc-label { font-size: 12px; color: rgba(255,255,255,0.6); font-weight: 500; line-height: 1.4; }
    .calc-hint { color: rgba(255,255,255,0.3); font-weight: 400; }
    .calc-slider-wrap { display: flex; flex-direction: column; gap: 4px; }
    .calc-slider-val { font-size: 13px; font-weight: 600; color: var(--white); }
    input[type=range] {
      -webkit-appearance: none; width: 100%; height: 4px;
      background: rgba(255,255,255,0.12); border-radius: 2px; outline: none; cursor: pointer;
    }
    input[type=range]::-webkit-slider-thumb {
      -webkit-appearance: none; width: 16px; height: 16px;
      border-radius: 50%; background: var(--blue);
      box-shadow: 0 0 0 3px rgba(110,193,228,0.25);
      cursor: pointer;
    }
    input[type=range]::-webkit-slider-runnable-track {
      height: 4px; border-radius: 2px;
    }
    .calc-benchmark {
      display: flex; align-items: center; gap: 6px;
      margin-top: 12px; flex-wrap: wrap;
    }
    .bench-item {
      font-size: 10px; font-weight: 600; padding: 3px 9px;
      border-radius: 20px; letter-spacing: 0.02em;
    }
    .bench-manual { background: rgba(255,255,255,0.07); color: rgba(255,255,255,0.4); }
    .bench-email  { background: rgba(110,193,228,0.12); color: var(--blue); }
    .bench-ai     { background: rgba(97,206,112,0.12); color: var(--green); }
    .bench-arrow  { color: rgba(255,255,255,0.2); font-size: 12px; }
    .track-card {
      padding: 12px 13px; border-radius: 8px; cursor: pointer;
      border: 1px solid rgba(255,255,255,0.08);
      background: rgba(255,255,255,0.03);
      transition: border-color 0.2s, background 0.2s;
    }
    .track-card:hover { border-color: rgba(255,255,255,0.18); }
    .track-card.active { border-color: var(--blue); background: rgba(110,193,228,0.07); }
    .track-card-name { font-size: 12px; font-weight: 600; color: var(--white); margin-bottom: 4px; }
    .track-card-setup { font-size: 16px; font-weight: 700; color: var(--white); line-height: 1.2; }
    .track-card-setup span { font-size: 10px; font-weight: 400; color: rgba(255,255,255,0.35); }
    .track-card-comm { font-size: 11px; font-weight: 600; margin-top: 2px; }
    .track-card-divider { height: 1px; background: rgba(255,255,255,0.07); margin: 8px 0; }
    .track-card-row { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: rgba(255,255,255,0.35); margin-bottom: 3px; }
    .track-card-row span:last-child { font-weight: 600; color: rgba(255,255,255,0.65); }
    .track-card-breakeven { font-size: 10px; color: rgba(255,255,255,0.25); margin-top: 6px; line-height: 1.5; }

    /* Track-lift comparison rows inside booking distribution card */
    .track-lift-row {
      display: grid;
      grid-template-columns: 90px 1fr 72px 72px;
      gap: 8px;
      align-items: center;
      padding: 9px 12px;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      cursor: pointer;
      transition: background 0.15s;
    }
    .track-lift-row:last-child { border-bottom: none; }
    .track-lift-row:hover { background: rgba(255,255,255,0.03); }
    .track-lift-row.tl-active { background: rgba(110,193,228,0.07); border-left: 2px solid var(--blue); padding-left: 10px; }
    .tl-name  { font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.65); }
    .tl-work  { font-size: 10px; color: rgba(255,255,255,0.28); line-height: 1.4; }
    .tl-lift  { font-size: 11px; font-weight: 700; color: var(--blue); text-align: right; }
    .tl-save  { font-size: 11px; font-weight: 700; color: var(--green); text-align: right; }
    .breakdown-row {
      display: flex; justify-content: space-between; align-items: center;
      padding: 6px 0;
    }
    .breakdown-label { font-size: 12.5px; color: rgba(255,255,255,0.5); }
    .breakdown-val   { font-size: 13px; font-weight: 600; color: var(--white); }
    .calc-working-row {
      display: flex; align-items: baseline; gap: 7px;
      padding: 3px 0 3px 6px;
      border-left: 2px solid rgba(255,255,255,0.06);
      margin-left: 4px;
    }
    .calc-working-icon { font-size: 11px; flex-shrink: 0; }
    .calc-working-text { font-size: 11.5px; color: rgba(255,255,255,0.3); line-height: 1.5; }
    @media (max-width: 900px) {
      #roi-calculator > .container > div[style*="grid-template-columns:1fr 1.1fr"] {
        grid-template-columns: 1fr !important;
      }
      .calc-row { grid-template-columns: 1fr !important; }
    }