/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  --primary:      #00aaff;
  --primary-dark: #0077B6;
  --primary-lt:   #E0F4FF;
  --primary-dim:  #BAE6FD;
  --navy:         #1F4E79;
  --navy-2:       #0F2A4A;
  --ink:          #111827;
  --ink-2:        #1F2937;
  --ink-3:        #374151;
  --ink-4:        #6B7280;
  --ink-5:        #9CA3AF;
  --canvas:       #FFFFFF;
  --surface:      #F8FAFF;
  --surface-2:    #F1F7FF;
  --border:       rgba(0,0,0,.08);
  --border-2:     rgba(0,170,255,.2);
  --green:        #059669;
  --green-lt:     #ECFDF5;
  --amber:        #D97706;
  --amber-lt:     #FFFBEB;
  --red:          #DC2626;
  --red-lt:       #FEF2F2;
  --orange:       #EA580C;
  --orange-lt:    #FFF7ED;
  /* Brand gradient */
  --grad:         linear-gradient(135deg, #00aaff 0%, #0055cc 50%, #6600cc 100%);
  --grad-text:    linear-gradient(135deg, #00aaff 0%, #0066dd 45%, #7722dd 100%);
  --radius:       12px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:    0 4px 16px rgba(0,0,0,.1), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:    0 10px 40px rgba(0,0,0,.12), 0 4px 16px rgba(0,0,0,.08);
}

[data-theme="dark"] {
  --canvas:    #0A1628;
  --surface:   #0F2040;
  --surface-2: #162848;
  --ink:       #E8F4FF;
  --ink-2:     #C5DFF8;
  --ink-3:     #8FB8D8;
  --ink-4:     #5A8AAA;
  --border:    rgba(255,255,255,.08);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--canvas);
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { padding-left: 1.5rem; }
li { margin-bottom: .35rem; }

/* ============================================================
   SCOPED: all styles under .kf-container
   ============================================================ */
.kf-container .kf-logo-mark rect { fill: url(#logoGrad) !important; }
.kf-container .kf-logo-mark path { stroke: #fff !important; }

/* ============================================================
   GRADIENT TEXT UTILITY
   ============================================================ */
.kf-container .kf-grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   HEADER
   ============================================================ */
.kf-container .kf-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.25rem;
}
[data-theme="dark"] .kf-container .kf-header {
  background: rgba(10,22,40,.95);
}
.kf-container .kf-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  gap: 1rem;
}
.kf-container .kf-logo-link {
  display: flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  flex-shrink: 0;
}
.kf-container .kf-logo-link:hover { text-decoration: none; }
.kf-container .kf-logo-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.kf-container .kf-logo-top {
  font-size: .625rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.kf-container .kf-logo-bottom {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kf-container .kf-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.kf-container .kf-nav li { margin: 0; }
.kf-container .kf-nav a {
  font-size: .9rem;
  font-weight: 600;
  color: var(--ink-4);
  text-decoration: none;
  padding: .3rem 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.kf-container .kf-nav a:hover,
.kf-container .kf-nav a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  text-decoration: none;
}
.kf-container .kf-nav-cta {
  background: var(--grad);
  color: #fff !important;
  border: none !important;
  border-radius: 8px;
  padding: .4rem .9rem !important;
  font-size: .875rem !important;
  transition: opacity .15s, transform .1s !important;
}
.kf-container .kf-nav-cta:hover { opacity: .9; transform: translateY(-1px); }
.kf-container .kf-theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-4);
  flex-shrink: 0;
  transition: background .15s, border-color .15s;
}
.kf-container .kf-theme-toggle:hover { background: var(--surface); border-color: var(--primary); color: var(--primary); }
.kf-container .kf-hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--ink-4);
  flex-shrink: 0;
}
.kf-container .kf-mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--canvas);
  z-index: 200;
  padding: 1.5rem;
  flex-direction: column;
  gap: 1.5rem;
}
.kf-container .kf-mobile-nav.open { display: flex; }
.kf-container .kf-mobile-nav-header { display: flex; justify-content: space-between; align-items: center; }
.kf-container .kf-mobile-nav-links { display: flex; flex-direction: column; gap: .5rem; list-style: none; padding: 0; }
.kf-container .kf-mobile-nav-links a {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-2);
  text-decoration: none;
  display: block;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
}
.kf-container .kf-close-btn { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--ink-4); }
@media (max-width: 640px) {
  .kf-container .kf-nav { display: none; }
  .kf-container .kf-hamburger { display: flex; }
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.kf-container .kf-breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: .75rem 1.25rem;
  font-size: .875rem;
  color: var(--ink-4);
}
.kf-container .kf-breadcrumb a { color: var(--ink-4); text-decoration: none; }
.kf-container .kf-breadcrumb a:hover { color: var(--primary); }
.kf-container .kf-breadcrumb span { margin: 0 .4rem; }

/* ============================================================
   HERO
   ============================================================ */
.kf-container .kf-hero {
  background: linear-gradient(160deg, #04070d 0%, #0d1f3c 40%, #0a1628 100%);
  position: relative;
  overflow: hidden;
  padding: 3.5rem 1.25rem 4rem;
}
.kf-container .kf-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 70% at 8% 50%, rgba(0,100,255,.2) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 90% 20%, rgba(100,0,200,.15) 0%, transparent 55%);
  pointer-events: none;
}
.kf-container .kf-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,170,255,.4), rgba(102,0,204,.4), transparent);
}
.kf-container .kf-hero-inner {
  max-width: 780px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  text-align: center;
}
.kf-container .kf-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 100px;
  padding: .3rem 1rem;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: rgba(232,244,255,.6);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.kf-container .kf-hero-eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--grad);
  flex-shrink: 0;
}
.kf-container .kf-hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -.04em;
  line-height: 1.08;
  margin-bottom: 1.25rem;
  color: #fff;
}
.kf-container .kf-hero h1 .kf-h1-accent {
  background: linear-gradient(135deg, #38beff 0%, #60a0ff 50%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kf-container .kf-hero-sub {
  font-size: 1.0625rem;
  color: rgba(232,244,255,.6);
  max-width: 520px;
  margin: 0 auto 2rem;
  line-height: 1.65;
}
.kf-container .kf-hero-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.kf-container .kf-hero-meta-item {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .875rem;
  color: rgba(232,244,255,.45);
}
.kf-container .kf-hero-meta-item svg { opacity: .5; }
.kf-container .kf-hero-meta-sep { width: 3px; height: 3px; border-radius: 50%; background: rgba(255,255,255,.15); }

/* ============================================================
   QUICK ANSWER / SNIPPET BOX
   ============================================================ */
.kf-container .kf-snippet-wrap {
  background: var(--canvas);
  padding: 0 1.25rem;
}
.kf-container .kf-snippet {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.4rem;
  margin: 2rem auto 0;
  max-width: 860px;
}
.kf-container .kf-snippet-label {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--primary);
  margin-bottom: .6rem;
}
.kf-container .kf-snippet ul { margin: 0; color: var(--ink-3); font-size: .9375rem; }
.kf-container .kf-snippet li { margin-bottom: .2rem; }

/* ============================================================
   MAIN LAYOUT
   ============================================================ */
.kf-container .kf-main {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

/* ============================================================
   SECTION HEADING
   ============================================================ */
.kf-container .kf-section-heading {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 800;
  color: var(--ink-2);
  letter-spacing: -.03em;
  margin-bottom: 1.25rem;
}
.kf-container .kf-section-heading .kf-grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   TOOL CARD
   ============================================================ */
.kf-container .kf-tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-top: 1.75rem;
}

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.kf-container .kf-progress {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}
.kf-container .kf-progress-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .55rem;
}
.kf-container .kf-progress-label {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink-3);
}
.kf-container .kf-progress-pct {
  font-size: .8125rem;
  color: var(--ink-4);
  font-weight: 600;
}
.kf-container .kf-progress-track {
  height: 6px;
  background: var(--border);
  border-radius: 100px;
  overflow: hidden;
}
.kf-container .kf-progress-fill {
  height: 100%;
  background: var(--grad);
  border-radius: 100px;
  width: 33%;
  transition: width .35s ease;
}
.kf-container .kf-progress-dots {
  display: flex;
  gap: .45rem;
  margin-top: .55rem;
}
.kf-container .kf-progress-dot {
  flex: 1;
  height: 3px;
  background: var(--border);
  border-radius: 100px;
  transition: background .3s;
}
.kf-container .kf-progress-dot.done { background: var(--primary); }
.kf-container .kf-progress-dot.active { background: rgba(0,170,255,.4); }

/* ============================================================
   STEP PANELS
   ============================================================ */
.kf-container .kf-step {
  padding: 1.75rem 1.5rem;
  display: none;
}
.kf-container .kf-step.visible { display: block; }
.kf-container .kf-step-question {
  font-size: clamp(1.1rem, 3vw, 1.3rem);
  font-weight: 800;
  color: var(--ink-2);
  letter-spacing: -.025em;
  margin-bottom: .4rem;
  line-height: 1.25;
}
.kf-container .kf-step-hint {
  font-size: .9375rem;
  color: var(--ink-4);
  margin-bottom: 1.35rem;
}
.kf-container .kf-options {
  display: flex;
  flex-direction: column;
  gap: .7rem;
}
@media (min-width: 580px) {
  .kf-container .kf-options { display: grid; grid-template-columns: 1fr 1fr; }
}
.kf-container .kf-option-btn {
  min-height: 64px;
  width: 100%;
  background: var(--canvas);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  padding: .85rem 1rem;
  transition: border-color .15s, background .15s, box-shadow .15s;
  display: flex;
  align-items: center;
  gap: .7rem;
  font-family: inherit;
}
.kf-container .kf-option-btn:hover {
  border-color: var(--primary);
  background: var(--primary-lt);
  box-shadow: 0 0 0 3px rgba(0,170,255,.1);
}
.kf-container .kf-option-btn:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}
.kf-container .kf-option-btn.selected {
  border-color: var(--primary);
  background: var(--primary-lt);
  box-shadow: 0 0 0 3px rgba(0,170,255,.18);
}
.kf-container .kf-option-icon {
  font-size: 1.375rem;
  flex-shrink: 0;
  width: 1.75rem;
  text-align: center;
}
.kf-container .kf-option-content { flex: 1; min-width: 0; }
.kf-container .kf-option-label {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink-2);
  display: block;
  line-height: 1.25;
}
.kf-container .kf-option-desc {
  font-size: .8125rem;
  color: var(--ink-4);
  display: block;
  margin-top: .15rem;
  line-height: 1.35;
}
.kf-container .kf-option-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  flex-shrink: 0;
  transition: background .15s, border-color .15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.kf-container .kf-option-btn.selected .kf-option-check {
  background: var(--primary);
  border-color: var(--primary);
}
.kf-container .kf-option-btn.selected .kf-option-check::after {
  content: '';
  width: 5px; height: 5px;
  background: white;
  border-radius: 50%;
  display: block;
}
@media (prefers-reduced-motion: no-preference) {
  .kf-container .kf-step.slide-in {
    animation: kfSlideIn .22s ease-out forwards;
  }
  @keyframes kfSlideIn {
    from { opacity: 0; transform: translateX(-16px); }
    to   { opacity: 1; transform: translateX(0); }
  }
}

/* ============================================================
   RESULT CARD
   ============================================================ */
.kf-container .kf-result {
  display: none;
  padding: 1.75rem 1.5rem;
}
.kf-container .kf-result.visible { display: block; }
.kf-container .kf-result-confidence {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .8125rem;
  font-weight: 700;
  padding: .28rem .75rem;
  border-radius: 100px;
  margin-bottom: .9rem;
}
.kf-container .kf-result-confidence.high { background: var(--green-lt); color: var(--green); }
.kf-container .kf-result-confidence.medium { background: var(--amber-lt); color: var(--amber); }
.kf-container .kf-result-headline {
  font-size: clamp(1.25rem, 4vw, 1.65rem);
  font-weight: 800;
  color: var(--ink-2);
  letter-spacing: -.03em;
  margin-bottom: .7rem;
  line-height: 1.15;
}
.kf-container .kf-result-cause {
  font-size: 1.0625rem;
  color: var(--ink-3);
  margin-bottom: 1.5rem;
  line-height: 1.65;
}
.kf-container .kf-result-section-label {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--ink-4);
  margin-bottom: .55rem;
}
.kf-container .kf-fix-steps {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.5rem;
}
.kf-container .kf-fix-steps ol { margin: 0; color: var(--ink-3); font-size: 1rem; }
.kf-container .kf-fix-steps li { margin-bottom: .5rem; line-height: 1.5; }
.kf-container .kf-fix-steps li:last-child { margin-bottom: 0; }
.kf-container .kf-parts-grid { display: flex; flex-direction: column; gap: .65rem; margin-bottom: 1.5rem; }
.kf-container .kf-part-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .65rem;
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .8rem 1rem;
}
.kf-container .kf-part-name {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink-2);
  flex: 1;
  min-width: 120px;
}
.kf-container .kf-part-note {
  font-size: .8125rem;
  color: var(--ink-4);
  display: block;
  font-weight: 400;
  margin-top: .1rem;
}
.kf-container .kf-cta-parts {
  min-height: 48px;
  background: var(--orange);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: .9rem;
  font-weight: 700;
  padding: .5rem 1.05rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  white-space: nowrap;
  transition: background .15s, transform .1s;
  font-family: inherit;
}
.kf-container .kf-cta-parts:hover { background: #c2460a; text-decoration: none; color: #fff; transform: translateY(-1px); }
.kf-container .kf-cta-replace {
  min-height: 48px;
  background: var(--green);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: .9rem;
  font-weight: 700;
  padding: .5rem 1.15rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  white-space: nowrap;
  transition: background .15s, transform .1s;
  font-family: inherit;
}
.kf-container .kf-cta-replace:hover { background: #047857; text-decoration: none; color: #fff; transform: translateY(-1px); }
.kf-container .kf-upgrade-box {
  background: var(--green-lt);
  border: 1.5px solid #a7f3d0;
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: .7rem;
}
.kf-container .kf-upgrade-icon { font-size: 1.35rem; flex-shrink: 0; margin-top: .05rem; }
.kf-container .kf-upgrade-text { flex: 1; }
.kf-container .kf-upgrade-text strong { display: block; color: var(--green); font-weight: 700; margin-bottom: .2rem; font-size: .9375rem; }
.kf-container .kf-upgrade-text p { font-size: .9375rem; color: var(--ink-3); margin: 0 0 .65rem; }
.kf-container .kf-when-replace {
  background: var(--amber-lt);
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: .8rem 1.05rem;
  margin-bottom: 1.5rem;
  font-size: .9375rem;
  color: var(--ink-3);
  line-height: 1.55;
}
.kf-container .kf-when-replace strong { color: var(--amber); }
.kf-container .kf-result-footer {
  padding-top: 1.1rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .65rem;
}
.kf-container .kf-plumber-link { font-size: .9375rem; color: var(--ink-4); }
.kf-container .kf-plumber-link a { color: var(--primary); font-weight: 600; }
.kf-container .kf-result-actions { display: flex; gap: .6rem; flex-wrap: wrap; }
.kf-container .kf-btn-copy,
.kf-container .kf-btn-restart {
  min-height: 44px;
  border-radius: 10px;
  font-size: .875rem;
  font-weight: 700;
  padding: .45rem 1rem;
  cursor: pointer;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  transition: background .15s, border-color .15s;
  white-space: nowrap;
}
.kf-container .kf-btn-copy {
  background: var(--surface-2);
  border: 1.5px solid var(--border-2);
  color: var(--ink-3);
}
.kf-container .kf-btn-copy:hover { background: var(--primary-lt); border-color: var(--primary); color: var(--primary); }
.kf-container .kf-btn-restart {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--ink-4);
}
.kf-container .kf-btn-restart:hover { border-color: var(--ink-3); color: var(--ink-2); }
@media (max-width: 540px) {
  .kf-container .kf-result-footer {
    position: sticky;
    bottom: 0;
    background: var(--surface);
    margin: 0 -1.5rem -1.75rem;
    padding: .9rem 1.5rem;
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 20px rgba(0,0,0,.08);
    z-index: 10;
    border-radius: 0 0 16px 16px;
  }
}

/* ============================================================
   DISCLOSURE
   ============================================================ */
.kf-container .kf-disclosure {
  font-size: .8125rem;
  color: var(--ink-4);
  text-align: center;
  padding: .65rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
  line-height: 1.5;
}

/* ============================================================
   BLOG POSTS SECTION
   ============================================================ */
.kf-container .kf-blog-section {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}
.kf-container .kf-blog-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: .5rem;
}
.kf-container .kf-blog-section h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-2);
  letter-spacing: -.025em;
}
.kf-container .kf-blog-all-link {
  font-size: .875rem;
  font-weight: 600;
  color: var(--primary);
}
.kf-container .kf-blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 560px) { .kf-container .kf-blog-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 860px) { .kf-container .kf-blog-grid { grid-template-columns: 1fr 1fr 1fr; } }
.kf-container .kf-blog-card {
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  transition: border-color .15s, box-shadow .15s, transform .15s;
  min-height: 100px;
}
.kf-container .kf-blog-card:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,170,255,.1);
  transform: translateY(-2px);
  text-decoration: none;
}
.kf-container .kf-blog-card-tag {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--primary);
}
.kf-container .kf-blog-card-title {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink-2);
  line-height: 1.35;
}
.kf-container .kf-blog-card-meta {
  font-size: .8125rem;
  color: var(--ink-4);
  margin-top: auto;
}

/* ============================================================
   RELATED TOOLS PILLS
   ============================================================ */
.kf-container .kf-related { margin-top: 2rem; }
.kf-container .kf-related-label {
  font-size: .75rem;
  font-weight: 700;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: .65rem;
}
.kf-container .kf-pills { display: flex; flex-wrap: wrap; gap: .45rem; }
.kf-container .kf-pill {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .38rem .85rem;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 100px;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--ink-3);
  text-decoration: none;
  transition: background .15s, border-color .15s, color .15s;
  white-space: nowrap;
}
.kf-container .kf-pill:hover { background: var(--primary-lt); border-color: var(--primary); color: var(--primary); text-decoration: none; }

/* ============================================================
   FAQ SECTION
   ============================================================ */
.kf-container .kf-faq { margin-top: 3rem; }
.kf-container .kf-faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: .6rem;
  overflow: hidden;
}
.kf-container .kf-faq-q {
  width: 100%;
  background: var(--surface);
  border: none;
  text-align: left;
  padding: 1rem 1.25rem;
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink-2);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  font-family: inherit;
  min-height: 56px;
  transition: background .15s;
}
.kf-container .kf-faq-q:hover { background: var(--primary-lt); }
.kf-container .kf-faq-q-icon { font-size: 1.1rem; color: var(--primary); flex-shrink: 0; font-weight: 400; transition: transform .2s; }
.kf-container .kf-faq-item.open .kf-faq-q-icon { transform: rotate(45deg); }
.kf-container .kf-faq-a {
  display: none;
  padding: 1rem 1.25rem;
  font-size: .9375rem;
  color: var(--ink-3);
  line-height: 1.65;
  border-top: 1px solid var(--border);
  background: var(--canvas);
}
.kf-container .kf-faq-item.open .kf-faq-a { display: block; }

/* ============================================================
   DISCLAIMER
   ============================================================ */
.kf-container .kf-disclaimer {
  font-size: .8125rem;
  color: var(--ink-4);
  text-align: center;
  padding: .75rem;
  margin-top: 2.5rem;
  border-top: 1px solid var(--border);
  line-height: 1.55;
}

/* ============================================================
   FOOTER
   ============================================================ */
.kf-container .kf-footer {
  background: #050c1a;
  color: rgba(232,244,255,.55);
  padding: 3rem 1.25rem 1.5rem;
  margin-top: 5rem;
}
.kf-container .kf-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) { .kf-container .kf-footer-inner { grid-template-columns: 2fr 1fr 1fr; } }
.kf-container .kf-footer-brand p {
  font-size: .9rem;
  color: rgba(232,244,255,.4);
  margin-top: .5rem;
  line-height: 1.55;
}
.kf-container .kf-footer-logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
}
.kf-container .kf-footer-logo-text {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kf-container .kf-footer-col h3 {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: rgba(232,244,255,.3);
  margin-bottom: .75rem;
}
.kf-container .kf-footer-col ul { list-style: none; padding: 0; }
.kf-container .kf-footer-col li { margin-bottom: .4rem; }
.kf-container .kf-footer-col a { font-size: .9rem; color: rgba(232,244,255,.5); text-decoration: none; }
.kf-container .kf-footer-col a:hover { color: var(--primary); }
.kf-container .kf-footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,.06);
  font-size: .8125rem;
  color: rgba(232,244,255,.25);
  line-height: 1.55;
}

/* ============================================================
   ARTICLE SECTION
   ============================================================ */
.kf-container .kf-article {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  max-width: 72ch;
}
.kf-container .kf-article-heading {
  font-size: clamp(1.2rem, 3vw, 1.45rem);
  font-weight: 800;
  color: var(--ink-2);
  letter-spacing: -.03em;
  margin-bottom: 1.1rem;
}
.kf-container .kf-article-subheading {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink-2);
  margin: 1.6rem 0 .55rem;
}
.kf-container .kf-article p {
  font-size: 1.0625rem;
  color: var(--ink-3);
  line-height: 1.72;
  margin-bottom: .9rem;
}
.kf-container .kf-article p:last-child {
  margin-bottom: 0;
}