/* === CUSTOM PROPERTIES === */
:root {
  --c-bg:          #0a0e1a;
  --c-surface:     #111827;
  --c-surface-2:   #1a2540;
  --c-navy:        #1e3a5f;
  --c-primary:     #2563eb;
  --c-blue:        #3b82f6;
  --c-light:       #60a5fa;
  --c-pale:        #bfdbfe;
  --c-text:        #ffffff;
  --c-text-muted:  #93c5fd;

  --layer-machine:  #1d4ed8;
  --layer-okf:      #2563eb;
  --layer-human:    #3b82f6;
  --layer-evidence: #60a5fa;
  --layer-skills:   #93c5fd;
  --layer-l10n:     #bfdbfe;

  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;

  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.125rem;
  --fs-xl:   1.25rem;
  --fs-2xl:  1.5rem;
  --fs-3xl:  1.875rem;
  --fs-hero: clamp(2.25rem, 5vw, 3.75rem);

  --space-section: clamp(4rem, 8vw, 7rem);

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;

  --shadow-card:       0 0 0 1px rgba(37,99,235,0.18), 0 4px 24px rgba(0,0,0,0.4);
  --shadow-card-hover: 0 0 0 1px rgba(59,130,246,0.4), 0 8px 40px rgba(37,99,235,0.18);
  --shadow-glow:       0 0 40px rgba(37,99,235,0.25);

  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--c-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-text); }
:focus-visible { outline: 2px solid var(--c-blue); outline-offset: 3px; border-radius: 2px; }
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: rgba(37,99,235,0.15);
  color: var(--c-light);
  padding: 0.1em 0.4em;
  border-radius: var(--radius-sm);
}
ul, ol { list-style: none; }

/* === LAYOUT === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}
section { padding: var(--space-section) 0; }

/* === SKIP LINK === */
.skip-link {
  position: absolute; top: -100%; left: 1rem;
  background: var(--c-primary); color: #fff;
  padding: 0.5rem 1.25rem; border-radius: var(--radius-md);
  font-weight: 600; z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus { top: 1rem; }

/* === HEADER / NAV === */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(37,99,235,0.12);
  transition: border-color var(--transition), background var(--transition);
}
header.scrolled {
  background: rgba(10, 14, 26, 0.95);
  border-bottom-color: rgba(59,130,246,0.25);
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}
.logo-link { display: flex; align-items: center; gap: 0.25rem; }
.logo-dkp {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--c-light);
  letter-spacing: -0.02em;
}
.logo-standard {
  font-size: var(--fs-xl);
  font-weight: 400;
  color: rgba(255,255,255,0.6);
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-links li { list-style: none; }
.nav-links a {
  color: var(--c-text-muted);
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--c-text); background: rgba(255,255,255,0.05); }
.nav-github {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  border: 1px solid rgba(96,165,250,0.25) !important;
  margin-left: 0.5rem;
}
.nav-github:hover { border-color: rgba(96,165,250,0.5) !important; }

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-weight: 600;
  font-size: var(--fs-base);
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn--primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 0 24px rgba(37,99,235,0.4);
}
.btn--primary:hover {
  background: var(--c-blue);
  color: #fff;
  box-shadow: 0 0 40px rgba(59,130,246,0.55);
  transform: translateY(-1px);
}
.btn--secondary {
  background: transparent;
  color: var(--c-light);
  border: 1px solid rgba(96,165,250,0.35);
}
.btn--secondary:hover {
  background: rgba(96,165,250,0.08);
  border-color: var(--c-light);
  color: var(--c-text);
  transform: translateY(-1px);
}

/* === SECTION TYPOGRAPHY === */
.section-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--c-blue);
  margin-bottom: 0.75rem;
}
h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section-sub {
  font-size: var(--fs-lg);
  color: var(--c-text-muted);
  max-width: 60ch;
  margin-bottom: 3rem;
  line-height: 1.7;
}

/* === SCROLL REVEALS === */
.reveal-section {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal-section.is-visible { opacity: 1; transform: translateY(0); }

.feature-card, .tier-card, .persona-card, .step-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease var(--delay, 0ms), transform 0.5s ease var(--delay, 0ms),
              box-shadow var(--transition), border-color var(--transition);
}
.feature-card.is-visible,
.tier-card.is-visible,
.persona-card.is-visible,
.step-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* === HERO === */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.mesh-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  will-change: transform;
}
.mesh-orb--1 {
  width: 700px; height: 700px;
  top: -15%; left: -8%;
  background: radial-gradient(circle, #1e3a5f 0%, transparent 65%);
  animation: orb1 20s ease-in-out infinite;
}
.mesh-orb--2 {
  width: 450px; height: 450px;
  top: 10%; right: 8%;
  background: radial-gradient(circle, #2563eb 0%, transparent 65%);
  animation: orb2 16s ease-in-out infinite;
}
.mesh-orb--3 {
  width: 350px; height: 350px;
  bottom: 5%; left: 25%;
  background: radial-gradient(circle, #3b82f6 0%, transparent 65%);
  animation: orb3 22s ease-in-out infinite;
}
.mesh-orb--4 {
  width: 550px; height: 550px;
  bottom: -20%; right: -5%;
  background: radial-gradient(circle, #1d4ed8 0%, transparent 65%);
  animation: orb4 18s ease-in-out infinite;
}
@keyframes orb1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(3%, 5%) scale(1.05); }
  66%       { transform: translate(-2%, 2%) scale(0.97); }
}
@keyframes orb2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%       { transform: translate(-5%, 4%) scale(1.1); }
}
@keyframes orb3 {
  0%, 100% { transform: translate(0, 0); }
  40%       { transform: translate(4%, -6%); }
  80%       { transform: translate(-3%, 2%); }
}
@keyframes orb4 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  60%       { transform: translate(-3%, -4%) scale(1.07); }
}
.hero-grid-overlay {
  position: absolute;
  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: 48px 48px;
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding-top: 5rem;
  padding-bottom: 5rem;
}
.hero-content { display: flex; flex-direction: column; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-light);
  background: rgba(37,99,235,0.15);
  border: 1px solid rgba(37,99,235,0.35);
  padding: 0.3rem 0.875rem;
  border-radius: 999px;
  width: fit-content;
  margin-bottom: 1.5rem;
}
h1 {
  font-size: var(--fs-hero);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
.hero-sub {
  font-size: var(--fs-lg);
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 50ch;
  margin-bottom: 2.25rem;
}
.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}
.hero-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid rgba(59,130,246,0.2);
}
.stat-num {
  display: block;
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--c-light);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  display: block;
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
}

/* Floating card */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.floating-card {
  background: rgba(17, 24, 39, 0.7);
  border: 1px solid rgba(59,130,246,0.28);
  border-radius: var(--radius-xl);
  width: 280px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 0 60px rgba(37,99,235,0.2), 0 0 0 1px rgba(37,99,235,0.08);
  animation: card-float 6s ease-in-out infinite;
  overflow: hidden;
}
@keyframes card-float {
  0%, 100% { transform: translateY(0px) rotate(-0.5deg); }
  50%       { transform: translateY(-14px) rotate(0.5deg); }
}
.fc-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid rgba(59,130,246,0.15);
  background: rgba(30,58,95,0.3);
}
.fc-dot {
  width: 0.6rem; height: 0.6rem;
  border-radius: 50%;
}
.fc-dot--1 { background: rgba(96,165,250,0.6); }
.fc-dot--2 { background: rgba(37,99,235,0.5); }
.fc-dot--3 { background: rgba(29,78,216,0.4); }
.fc-title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  flex: 1;
}
.fc-body { padding: 0.75rem; }
.fc-layer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.45rem 0.625rem;
  margin: 0.25rem 0;
  border-radius: var(--radius-sm);
  border-left: 2px solid;
  transition: transform var(--transition), background var(--transition);
  cursor: default;
}
.fc-layer:hover { transform: translateX(4px); }
.fc-layer-name {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  min-width: 70px;
  color: var(--c-text);
}
.fc-layer-desc {
  font-size: 0.65rem;
  color: var(--c-text-muted);
  line-height: 1.3;
}
.fc-layer--machine  { background: rgba(29,78,216,0.18);  border-color: var(--layer-machine); }
.fc-layer--okf      { background: rgba(37,99,235,0.14);  border-color: var(--layer-okf); }
.fc-layer--human    { background: rgba(59,130,246,0.12); border-color: var(--layer-human); }
.fc-layer--evidence { background: rgba(96,165,250,0.1);  border-color: var(--layer-evidence); }
.fc-layer--skills   { background: rgba(147,197,253,0.08);border-color: var(--layer-skills); }
.fc-layer--l10n     { background: rgba(191,219,254,0.06);border-color: var(--layer-l10n); }
.fc-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-top: 1px solid rgba(59,130,246,0.15);
  background: rgba(30,58,95,0.2);
}
.fc-badge {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--c-light);
  background: rgba(37,99,235,0.25);
  border: 1px solid rgba(37,99,235,0.4);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}
.fc-version {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--c-text-muted);
}

/* === PROBLEM === */
#problem { background: var(--c-surface); }
.problem-split {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: start;
  margin-top: 1rem;
}
.problem-col h3 {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: 1.25rem;
}
.problem-col--before h3 { color: rgba(255,255,255,0.5); }
.problem-col--after h3  { color: var(--c-light); }
.problem-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.625rem 0;
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.problem-item:last-child { border-bottom: none; }
.problem-item::before {
  content: '';
  display: inline-block;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
  border-radius: 50%;
}
.problem-item--bad::before {
  background: rgba(96,165,250,0.15);
  border: 1px solid rgba(96,165,250,0.25);
}
.problem-item--good::before {
  background: var(--c-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='white' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2.5 6l2.5 2.5 4.5-5'/%3E%3C/svg%3E");
  background-size: contain;
}
.problem-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 3.5rem;
  color: var(--c-blue);
}

/* === HOW IT WORKS === */
.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  position: relative;
  padding-top: 0.5rem;
}
.steps-list::before {
  content: '';
  position: absolute;
  top: 2.25rem;
  left: calc(16.67% + 1.5rem);
  right: calc(16.67% + 1.5rem);
  height: 1px;
  background: linear-gradient(90deg, rgba(37,99,235,0.5) 0%, rgba(59,130,246,0.5) 50%, rgba(37,99,235,0.5) 100%);
}
.step-card {
  background: var(--c-surface);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.step-card:hover {
  border-color: rgba(59,130,246,0.35);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.step-number {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--c-blue);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.step-icon-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.step-icon {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-light);
}
.step-icon svg { display: block; }
.step-card h3 {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin: 0;
  line-height: 1;
  letter-spacing: -0.01em;
}
.step-card p {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* === FEATURES === */
#features { background: var(--c-bg); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.feature-card {
  background: var(--c-surface);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  cursor: default;
  transition:
    opacity 0.5s ease var(--delay, 0ms),
    transform 0.5s ease var(--delay, 0ms),
    border-color var(--transition),
    box-shadow var(--transition);
}
.feature-card.is-visible { opacity: 1; transform: translateY(0); }
.feature-card:hover {
  border-color: rgba(59,130,246,0.4);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px) !important;
}
.feature-icon-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.feature-icon {
  width: 2.25rem;
  height: 2.25rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-light);
}
.feature-icon svg { display: block; }
.feature-card h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin: 0;
  line-height: 1;
  letter-spacing: -0.01em;
}
.feature-card p {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* === BUNDLE ANATOMY === */
#bundle-anatomy { background: var(--c-surface); }
.anatomy-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 3rem;
  align-items: start;
}
.anatomy-tree {
  background: #070b14;
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: var(--radius-lg);
  padding: 2rem;
  font-family: var(--font-mono);
}
.tree-root {
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 0.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(37,99,235,0.15);
  margin-bottom: 0.75rem;
}
.tree-layer {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 0.6rem 0.75rem;
  margin: 0.3rem 0 0.3rem 1rem;
  border-left: 2px solid;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: transform var(--transition);
  cursor: default;
}
.tree-layer:hover { transform: translateX(4px); }
.tree-icon { color: rgba(255,255,255,0.3); font-size: var(--fs-sm); flex-shrink: 0; }
.tree-layer-name {
  font-size: var(--fs-sm);
  font-weight: 700;
  min-width: 90px;
  flex-shrink: 0;
}
.tree-layer-desc {
  font-size: 0.75rem;
  color: var(--c-text-muted);
  line-height: 1.5;
  font-family: var(--font);
}
.tree-layer--machine  { background: rgba(29,78,216,0.12);  border-color: var(--layer-machine);  color: #93b4fd; }
.tree-layer--okf      { background: rgba(37,99,235,0.1);   border-color: var(--layer-okf);      color: #93b4fd; }
.tree-layer--human    { background: rgba(59,130,246,0.09); border-color: var(--layer-human);    color: #93c5fd; }
.tree-layer--evidence { background: rgba(96,165,250,0.08); border-color: var(--layer-evidence); color: #93c5fd; }
.tree-layer--skills   { background: rgba(147,197,253,0.07);border-color: var(--layer-skills);   color: #bfdbfe; }
.tree-layer--l10n     { background: rgba(191,219,254,0.05);border-color: var(--layer-l10n);     color: #bfdbfe; }
.anatomy-legend h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--c-text);
}
.asset-list { display: flex; flex-direction: column; gap: 0.625rem; }
.asset-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.5;
}
.asset-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(37,99,235,0.2);
  color: var(--c-light);
  border: 1px solid rgba(37,99,235,0.3);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
}

/* === QUALITY TIERS === */
#quality-tiers { background: var(--c-bg); }
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}
.tier-card {
  background: var(--c-surface);
  border: 1px solid rgba(37,99,235,0.18);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition:
    opacity 0.5s ease var(--delay, 0ms),
    transform 0.5s ease var(--delay, 0ms),
    box-shadow var(--transition);
}
.tier-card--featured {
  border-color: var(--c-blue);
  box-shadow: 0 0 50px rgba(59,130,246,0.12), 0 0 0 1px rgba(59,130,246,0.25);
}
.tier-featured-badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--c-primary);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 700;
  padding: 0.25rem 0.875rem;
  border-radius: 999px;
  white-space: nowrap;
  letter-spacing: 0.05em;
}
.tier-automation {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-blue);
  margin-bottom: 0.75rem;
}
.tier-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  background: rgba(37,99,235,0.18);
  color: var(--c-light);
  border: 1px solid rgba(37,99,235,0.3);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-weight: 600;
}
.tier-desc {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.check-list { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.5;
}
.check-list li::before {
  content: '';
  display: inline-block;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
  background: var(--c-primary);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='white' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2.5 6l2.5 2.5 4.5-5'/%3E%3C/svg%3E");
  background-size: contain;
}
.tier-command {
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
}

/* === CLI === */
#cli { background: var(--c-surface); }
.cli-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 3rem;
  align-items: start;
}
.code-block {
  background: #070b14;
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.9;
  overflow-x: auto;
}
.code-line { display: block; }
.code-line--blank { height: 0.5rem; }
.prompt { color: var(--c-light); user-select: none; }
.cmd    { color: #ffffff; font-weight: 500; }
.flag   { color: #7dd3fc; }
.out    { color: var(--c-text-muted); }
.ok     { color: #86efac; font-weight: 500; }
.cli-commands-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.cmd-group h4 {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-text-muted);
  margin-bottom: 0.625rem;
}
.cmd-tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.cmd-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  background: rgba(37,99,235,0.14);
  color: var(--c-light);
  border: 1px solid rgba(37,99,235,0.25);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: default;
}
.cli-install {
  display: flex;
  justify-content: center;
  margin-top: 2.5rem;
}
.cmd-tag:hover {
  background: rgba(59,130,246,0.24);
  border-color: var(--c-blue);
  color: #fff;
}

/* === USE CASES === */
#use-cases { background: var(--c-bg); }
.persona-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.persona-card {
  background: var(--c-surface);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  cursor: default;
  transition:
    opacity 0.5s ease var(--delay, 0ms),
    transform 0.5s ease var(--delay, 0ms),
    border-color var(--transition),
    box-shadow var(--transition);
}
.persona-card.is-visible { opacity: 1; transform: translateY(0); }
.persona-card:hover {
  border-color: rgba(59,130,246,0.35);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px) !important;
}
.persona-role {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-light);
}
.persona-card h3 {
  font-size: var(--fs-xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.persona-card p {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
  flex: 1;
}
.persona-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding-top: 0.875rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.persona-highlight {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  background: rgba(37,99,235,0.14);
  color: var(--c-text-muted);
  border: 1px solid rgba(37,99,235,0.22);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

/* === EXPLORE === */
.explore-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.explore-card {
  background: var(--c-surface);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}
.explore-card:hover {
  border-color: rgba(59,130,246,0.35);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.explore-icon {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  color: var(--c-blue);
}
.explore-icon svg { width: 2.5rem; height: 2.5rem; display: block; }
.explore-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-light);
}
.explore-card h3 {
  font-size: var(--fs-xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.explore-card p {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
  flex: 1;
}
.explore-command {
  padding-top: 0.875rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
}

/* === CTA BAND === */
#cta-band {
  background: linear-gradient(135deg, rgba(30,58,95,0.6) 0%, rgba(37,99,235,0.12) 100%);
  border-top: 1px solid rgba(59,130,246,0.15);
  border-bottom: 1px solid rgba(59,130,246,0.15);
}
.cta-band-inner {
  text-align: center;
  padding: 0;
}
#cta-band h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 1rem;
}
#cta-band p {
  font-size: var(--fs-lg);
  color: var(--c-text-muted);
  max-width: 55ch;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.cta-band-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* === FOOTER === */
footer {
  background: var(--c-surface);
  border-top: 1px solid rgba(37,99,235,0.15);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem 2rem;
  padding-top: 4rem;
  padding-bottom: 3rem;
  padding-inline: 1rem;
  align-items: flex-start;
}
.footer-brand {
  flex: 2 1 240px;
  max-width: 300px;
}
.footer-brand .logo-dkp  { font-size: var(--fs-2xl); font-weight: 700; color: var(--c-light); }
.footer-brand .logo-standard { font-size: var(--fs-2xl); font-weight: 400; color: rgba(255,255,255,0.5); }
.footer-tagline {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  margin-top: 0.75rem;
  line-height: 1.6;
}
.footer-meta {
  font-size: var(--fs-xs);
  color: rgba(147,197,253,0.6);
  margin-top: 0.35rem;
}
footer nav {
  flex: 1 1 200px;
  display: block;
  height: auto;
  overflow: visible;
  align-self: flex-start;
}
footer nav h4 {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-text);
  margin: 0 0 1rem;
}
footer nav ul { display: flex; flex-direction: column; gap: 0.5rem; }
footer nav a {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  transition: color var(--transition);
}
footer nav a:hover { color: var(--c-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-inline: 1rem;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  font-size: var(--fs-xs);
  color: rgba(147,197,253,0.5);
}
.footer-github {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--c-text-muted);
  font-size: var(--fs-xs);
  font-weight: 500;
  transition: color var(--transition);
}
.footer-github:hover { color: var(--c-light); }

/* === RESPONSIVE === */
@media (max-width: 1100px) {
  .footer-grid { gap: 2rem; }
  .footer-brand { flex-basis: 100%; }
  .anatomy-layout { grid-template-columns: 1fr; }
  .tiers-grid { grid-template-columns: 1fr; }
  .explore-grid { grid-template-columns: 1fr; }
  .persona-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .hero-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { display: none; }
  .steps-list { grid-template-columns: 1fr; }
  .steps-list::before { display: none; }
  .cli-grid { grid-template-columns: 1fr; }
  .problem-split { grid-template-columns: 1fr; gap: 1.5rem; }
  .problem-divider { display: none; }
}

@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.25rem; }
  .nav-links { display: none; }
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .cta-band-actions { flex-direction: column; align-items: center; }
  footer nav { flex-basis: 100%; }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .mesh-orb, .floating-card { animation: none !important; }
  .reveal-section,
  .feature-card,
  .tier-card,
  .persona-card,
  .step-card {
    opacity: 1 !important;
    transform: none !important;
  }
}