/* ============ RESET & FOUNDATION ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deep: #070D1A;
  --bg-base: #0B1220;
  --bg-surface: #111A2E;
  --bg-raised: #162239;
  --border-soft: rgba(91, 141, 239, 0.12);
  --border-strong: rgba(91, 141, 239, 0.28);

  --ink-0: #F1F5FC;
  --ink-1: #E1E8F5;
  --ink-2: #A8B5CC;
  --ink-3: #6C7B97;

  --blue-1: #5B8DEF;
  --blue-2: #3F6BC9;
  --blue-glow: rgba(91, 141, 239, 0.5);

  --copper: #E8A760;
  --copper-glow: rgba(232, 167, 96, 0.45);

  --green: #6BC490;
  --amber: #FFB84D;
  --red-soft: #F28181;

  --grad-hero: linear-gradient(135deg, #0B1220 0%, #111A2E 50%, #0B1220 100%);
  --grad-card: linear-gradient(145deg, rgba(22, 34, 57, 0.7) 0%, rgba(11, 18, 32, 0.7) 100%);
  --grad-cta: linear-gradient(135deg, #1a2c52 0%, #0b1220 100%);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  --nav-h: 72px;
  --container: 1240px;
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-1);
  background: var(--bg-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: inherit; text-decoration: none; transition: color 0.2s var(--ease-out); }
a:hover { color: var(--copper); }
a:focus-visible { outline: 2px solid var(--blue-1); outline-offset: 3px; border-radius: 3px; }

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
button:focus-visible { outline: 2px solid var(--blue-1); outline-offset: 3px; border-radius: 3px; }

em { font-family: var(--font-serif); font-style: italic; color: var(--copper); font-weight: 400; }

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink-0);
}

p { color: var(--ink-2); }

::selection { background: var(--blue-2); color: var(--ink-0); }

/* ============ LAYOUT ============ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 28px;
}

.section {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
}

.section-head { max-width: 760px; margin-bottom: 72px; }

.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border: 1px solid var(--border-soft);
  border-radius: 100px;
  background: rgba(232, 167, 96, 0.04);
}

.section-kicker.light { color: var(--blue-1); background: rgba(91, 141, 239, 0.08); border-color: rgba(91, 141, 239, 0.2); }

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.08;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.section-title em { font-size: 1.05em; }

.section-lead {
  font-size: 1.15rem;
  color: var(--ink-2);
  max-width: 640px;
  line-height: 1.6;
}

/* ============ BACKGROUND LAYERS ============ */
.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.bg-gradient {
  background:
    radial-gradient(ellipse at 10% 20%, rgba(91, 141, 239, 0.12), transparent 45%),
    radial-gradient(ellipse at 90% 80%, rgba(232, 167, 96, 0.08), transparent 45%),
    linear-gradient(180deg, var(--bg-deep), var(--bg-base) 60%, var(--bg-deep));
}

.bg-blueprint {
  background-image:
    linear-gradient(rgba(91, 141, 239, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 141, 239, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.6;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='200' height='200' filter='url(%23n)' opacity='0.8'/></svg>");
}

/* ============ PROGRESS BAR ============ */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 100%;
  z-index: 1000;
  background: rgba(91, 141, 239, 0.08);
  pointer-events: none;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--blue-1), var(--copper));
  box-shadow: 0 0 12px var(--blue-glow);
  transition: width 0.1s linear;
}

.progress-label {
  position: fixed;
  top: 12px;
  right: 18px;
  z-index: 1001;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.1em;
  background: rgba(11, 18, 32, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 6px 10px;
  border-radius: 100px;
  border: 1px solid var(--border-soft);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
  pointer-events: none;
}

.progress-label.show { opacity: 1; transform: translateY(0); }

/* ============ NAVIGATION ============ */
.nav {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: var(--nav-h);
  z-index: 100;
  transition: background 0.3s var(--ease-out), backdrop-filter 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(11, 18, 32, 0.78);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--border-soft);
}

.nav-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 0 28px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--ink-0);
  letter-spacing: -0.01em;
}

.brand:hover { color: var(--ink-0); }

.brand-mark {
  color: var(--blue-1);
  display: grid;
  place-items: center;
}

.brand-dot { color: var(--copper); }

.nav-links {
  display: flex;
  gap: 6px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 450;
  color: var(--ink-2);
  padding: 10px 16px;
  border-radius: 100px;
  position: relative;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
  color: var(--ink-0);
  background: rgba(91, 141, 239, 0.08);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 10px 18px;
  border-radius: 100px;
  background: rgba(91, 141, 239, 0.1);
  border: 1px solid var(--border-soft);
  color: var(--ink-1);
  transition: all 0.25s var(--ease-out);
}

.nav-cta:hover {
  background: rgba(91, 141, 239, 0.18);
  border-color: var(--blue-1);
  color: var(--ink-0);
  transform: translateY(-1px);
}

.nav-cta-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(91, 141, 239, 0.08);
  border: 1px solid var(--border-soft);
  position: relative;
}

.nav-toggle span {
  position: absolute;
  left: 12px;
  width: 16px;
  height: 1.5px;
  background: var(--ink-1);
  transition: all 0.3s var(--ease-out);
}

.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 24px; }

.nav-toggle.open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

.mobile-menu {
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(11, 18, 32, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-soft);
  padding: 20px 28px 30px;
}

.mobile-nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a {
  padding: 14px 16px;
  color: var(--ink-1);
  font-size: 1rem;
  border-radius: 10px;
  transition: background 0.2s;
}
.mobile-nav a:hover { background: rgba(91, 141, 239, 0.1); color: var(--ink-0); }
.mobile-nav-cta { margin-top: 10px; background: rgba(91, 141, 239, 0.1); border: 1px solid var(--border-soft); }

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 60px) 0 80px;
  overflow: hidden;
  background: var(--grad-hero);
}

.hero-stage {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.house-wireframe {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(320px, 48vw, 640px);
  height: auto;
  opacity: 0.9;
  animation: floatHouse 14s ease-in-out infinite;
  mask-image: radial-gradient(ellipse at center, black 50%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 50%, transparent 85%);
}

@keyframes floatHouse {
  0%, 100% { transform: translateY(-50%) rotate(-2deg); }
  50% { transform: translateY(calc(-50% - 18px)) rotate(2deg); }
}

.house-svg { width: 100%; height: auto; overflow: visible; }

.house-structure { filter: drop-shadow(0 0 12px rgba(91, 141, 239, 0.35)); }

.inspection-nodes .node {
  fill: var(--copper);
  filter: drop-shadow(0 0 6px var(--copper-glow));
  animation: nodePulse 3s ease-in-out infinite;
}

.inspection-nodes .node-roof { animation-delay: 0s; }
.inspection-nodes .node-chimney { animation-delay: 0.6s; }
.inspection-nodes .node-window { animation-delay: 1.2s; }
.inspection-nodes .node-door { animation-delay: 1.8s; }
.inspection-nodes .node-foundation { animation-delay: 2.4s; }

@keyframes nodePulse {
  0%, 100% { r: 3; opacity: 1; }
  50% { r: 4.5; opacity: 0.7; }
}

.scanner {
  transform: translateY(60px);
  animation: scan 5s linear infinite;
}

@keyframes scan {
  0% { transform: translateY(40px); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(320px); opacity: 0; }
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.6;
}

.hero-orb-1 { width: 380px; height: 380px; background: var(--blue-1); top: 10%; left: -10%; animation: orbDrift 20s ease-in-out infinite; }
.hero-orb-2 { width: 280px; height: 280px; background: var(--copper); bottom: 20%; right: 5%; animation: orbDrift 16s ease-in-out infinite reverse; }
.hero-orb-3 { width: 200px; height: 200px; background: var(--green); top: 40%; left: 40%; opacity: 0.25; animation: orbDrift 18s ease-in-out infinite 3s; }

@keyframes orbDrift {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -20px); }
  66% { transform: translate(-20px, 30px); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-soft);
  background: rgba(91, 141, 239, 0.06);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-1);
  box-shadow: 0 0 10px var(--blue-glow);
  animation: pulse-dot 2s infinite;
}

.hero-title {
  font-size: clamp(2.8rem, 7.5vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
  font-weight: 500;
  color: var(--ink-0);
  margin-bottom: 28px;
}

.hero-line {
  display: block;
  overflow: hidden;
}

.hero-line > span,
.hero-line {
  opacity: 0;
  transform: translateY(40px);
  animation: heroLine 1s var(--ease-out) forwards;
}

.hero-line:nth-child(2) { animation-delay: 0.15s; }

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

.hero-title em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--copper);
  background: linear-gradient(135deg, var(--copper) 0%, #ffc98a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 560px;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.4s forwards;
}

.hero-meta {
  display: flex;
  gap: 36px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.55s forwards;
}

.meta-item { display: flex; flex-direction: column; gap: 4px; }
.meta-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--ink-0);
  letter-spacing: -0.02em;
}
.meta-label {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.7s forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--blue-1), transparent);
  animation: scrollLine 2.4s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 100px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-1), var(--blue-2));
  color: var(--ink-0);
  box-shadow: 0 8px 24px -8px var(--blue-glow), inset 0 1px 0 rgba(255,255,255,0.15);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--copper), var(--amber));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary > * { position: relative; z-index: 1; }

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -8px var(--copper-glow), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { color: #1a1208; }

.btn-ghost {
  background: rgba(91, 141, 239, 0.06);
  border-color: var(--border-strong);
  color: var(--ink-1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(91, 141, 239, 0.14);
  border-color: var(--blue-1);
  color: var(--ink-0);
  transform: translateY(-2px);
}

.btn-large { padding: 18px 30px; font-size: 1.02rem; }

/* ============ INTRO SECTION ============ */
.section-intro { background: var(--bg-base); }

.blueprint-reveal {
  position: absolute;
  top: 80px;
  left: 0;
  width: 100%;
  height: 200px;
  opacity: 0.6;
  pointer-events: none;
  z-index: 0;
}

.blueprint-svg { width: 100%; height: 100%; }

.blueprint-line {
  stroke-dasharray: 1500;
  stroke-dashoffset: 1500;
}

.blueprint-reveal.in .blueprint-line {
  animation: drawLine 3s var(--ease-out) forwards;
}

@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 60px;
  align-items: start;
  position: relative;
  z-index: 1;
}

.intro-col-main p {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 22px;
  color: var(--ink-2);
}

.intro-col-main .lede {
  font-size: 1.2rem;
  line-height: 1.65;
  color: var(--ink-1);
  font-weight: 400;
  margin-bottom: 28px;
}

.spec-card {
  padding: 30px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: sticky;
  top: 100px;
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
}

.spec-head {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-soft);
}

.spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(91, 141, 239, 0.1);
  transition: transform 0.3s var(--ease-out);
}

.spec-list li:hover { transform: translateX(4px); }

.spec-list span {
  font-weight: 500;
  color: var(--ink-0);
  font-size: 0.98rem;
}

.spec-list em {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 0.84rem;
  color: var(--ink-3);
}

/* ============ PROBLEMS / X-RAY SECTION ============ */
.section-problems {
  background: linear-gradient(180deg, var(--bg-base) 0%, #0a1428 100%);
}

.xray-house {
  position: absolute;
  top: 50%;
  right: -8%;
  transform: translateY(-50%);
  width: 440px;
  height: 440px;
  pointer-events: none;
  opacity: 0.35;
}

.xray-layer {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  transition: all 1.5s var(--ease-out);
}

.xray-front {
  background:
    radial-gradient(circle at 50% 40%, transparent 30%, rgba(91, 141, 239, 0.08) 50%, transparent 70%),
    conic-gradient(from 0deg, rgba(91, 141, 239, 0.1), transparent 30%, rgba(232, 167, 96, 0.1) 50%, transparent 70%, rgba(91, 141, 239, 0.1));
  animation: xraySpin 30s linear infinite;
}

.xray-mid {
  background: radial-gradient(circle at 30% 60%, rgba(232, 167, 96, 0.15), transparent 40%);
  animation: xraySpin 24s linear infinite reverse;
  opacity: 0.6;
}

.xray-back {
  background: radial-gradient(circle at 70% 40%, rgba(107, 196, 144, 0.12), transparent 50%);
  animation: xraySpin 40s linear infinite;
  opacity: 0.5;
}

@keyframes xraySpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.xray-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(91, 141, 239, 0.2) 50%, transparent 100%);
  transform-origin: center;
  animation: xrayScan 4s linear infinite;
  border-radius: 50%;
}

@keyframes xrayScan {
  from { transform: rotate(0deg); opacity: 0.3; }
  50% { opacity: 0.7; }
  to { transform: rotate(360deg); opacity: 0.3; }
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  position: relative;
  z-index: 2;
}

.problem-card {
  padding: 36px 32px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), border-color 0.4s;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-1), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

.problem-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.problem-card:hover::before { opacity: 1; }

.problem-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  background: rgba(91, 141, 239, 0.08);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
}

.problem-icon svg { width: 28px; height: 28px; }

.problem-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--ink-0);
}

.problem-card p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--ink-2);
}

/* ============ SERVICES / 3D CARDS ============ */
.section-services {
  background: var(--bg-base);
  position: relative;
}

.section-services::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(91, 141, 239, 0.08), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(232, 167, 96, 0.05), transparent 50%);
  pointer-events: none;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  position: relative;
  z-index: 1;
}

.service-card {
  padding: 36px 30px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 22px;
  position: relative;
  transition: border-color 0.4s var(--ease-out), box-shadow 0.4s;
  transform-style: preserve-3d;
  will-change: transform;
}

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 22px;
  background: radial-gradient(
    600px circle at var(--mx, 50%) var(--my, 50%),
    rgba(91, 141, 239, 0.12),
    transparent 40%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
}

.service-card:hover::after { opacity: 1; }
.service-card:hover { border-color: var(--border-strong); box-shadow: 0 30px 60px -30px rgba(0,0,0,0.7); }

.service-num {
  position: absolute;
  top: 24px;
  right: 24px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  letter-spacing: 0.15em;
}

.service-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  background: linear-gradient(135deg, rgba(91, 141, 239, 0.15), rgba(232, 167, 96, 0.08));
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  color: var(--blue-1);
  transition: transform 0.4s var(--ease-spring), color 0.3s;
  transform: translateZ(30px);
}

.service-card:hover .service-icon {
  color: var(--copper);
  transform: translateZ(40px) rotate(-6deg);
}

.service-icon svg { width: 28px; height: 28px; }

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  transform: translateZ(20px);
}

.service-card p {
  font-size: 0.94rem;
  line-height: 1.65;
  transform: translateZ(10px);
}

.services-footnote {
  margin-top: 56px;
  padding: 28px 34px;
  background: linear-gradient(135deg, rgba(91, 141, 239, 0.06), rgba(232, 167, 96, 0.04));
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--copper);
  border-radius: 14px;
  position: relative;
  z-index: 1;
}

.services-footnote p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-1);
}

.services-footnote a {
  color: var(--copper);
  border-bottom: 1px solid rgba(232, 167, 96, 0.4);
  transition: border-color 0.2s;
}
.services-footnote a:hover { border-bottom-color: var(--copper); }

/* ============ PROCESS ============ */
.section-process {
  background: linear-gradient(180deg, var(--bg-base) 0%, #0a1428 100%);
}

.process-flow {
  position: relative;
  padding-top: 20px;
}

.process-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
}

.process-track { opacity: 0.4; }

.process-progress {
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  transition: stroke-dashoffset 1.5s var(--ease-out);
}

.process-flow.in .process-progress { stroke-dashoffset: 0; }

.process-dot {
  filter: drop-shadow(0 0 10px var(--copper-glow));
  opacity: 0;
  transition: opacity 0.3s 0.3s;
}

.process-flow.in .process-dot { opacity: 1; }

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  padding-top: 60px;
}

.process-step {
  padding: 26px 22px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  position: relative;
  transition: all 0.4s var(--ease-out);
}

.process-step::before {
  content: '';
  position: absolute;
  top: -34px;
  left: 26px;
  width: 1px;
  height: 20px;
  background: var(--border-strong);
}

.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 20px 40px -20px rgba(91, 141, 239, 0.2);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--copper);
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 1.08rem;
  margin-bottom: 10px;
  line-height: 1.25;
}

.process-step p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ============ BENEFITS ============ */
.section-benefits {
  background: var(--bg-base);
  position: relative;
}

.benefits-float {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.float-orb {
  position: absolute;
  top: var(--y);
  left: var(--x);
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--blue-1), transparent 70%);
  opacity: 0.15;
  filter: blur(40px);
  animation: floatOrb var(--d, 8s) ease-in-out infinite;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(40px, -30px); }
  66% { transform: translate(-30px, 40px); }
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  position: relative;
  z-index: 1;
}

.benefit {
  padding: 40px 34px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 22px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), border-color 0.4s;
}

.benefit:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.benefit-icon {
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(91, 141, 239, 0.12), rgba(232, 167, 96, 0.08));
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  color: var(--blue-1);
  margin-bottom: 22px;
  animation: iconFloat 4s ease-in-out infinite;
}

.benefit:nth-child(2) .benefit-icon { animation-delay: 0.5s; color: var(--copper); }
.benefit:nth-child(3) .benefit-icon { animation-delay: 1s; color: var(--green); }
.benefit:nth-child(4) .benefit-icon { animation-delay: 1.5s; color: var(--amber); }

@keyframes iconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.benefit-icon svg { width: 30px; height: 30px; }

.benefit h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.benefit p {
  font-size: 0.98rem;
  line-height: 1.65;
}

/* ============ EXPERT / TIMELINE ============ */
.section-expert {
  background: linear-gradient(180deg, var(--bg-base) 0%, #0a1428 100%);
}

.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline-rail {
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-soft);
}

.timeline-beam {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(180deg, var(--blue-1), transparent);
  filter: blur(6px);
  animation: beam 6s ease-in-out infinite;
}

@keyframes beam {
  0% { top: 0%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.timeline-items {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.timeline-item {
  position: relative;
  padding: 28px 32px;
  padding-left: 52px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color 0.3s, transform 0.3s;
}

.timeline-item:hover {
  border-color: var(--border-strong);
  transform: translateX(4px);
}

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 32px;
  width: 40px;
  height: 40px;
  background: var(--bg-deep);
  border: 2px solid var(--blue-1);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--blue-1);
  letter-spacing: 0.05em;
  box-shadow: 0 0 20px rgba(91, 141, 239, 0.3);
}

.timeline-item h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.timeline-item p {
  font-size: 0.98rem;
  line-height: 1.7;
}

.expert-cta {
  max-width: 720px;
  margin: 60px auto 0;
  padding: 28px 34px;
  background: linear-gradient(135deg, rgba(232, 167, 96, 0.08), rgba(91, 141, 239, 0.06));
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--copper);
  border-radius: 14px;
  text-align: center;
}

.expert-cta p {
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--ink-1);
}

.expert-cta a {
  color: var(--copper);
  border-bottom: 1px solid rgba(232, 167, 96, 0.4);
  font-weight: 500;
}

.expert-cta a:hover { border-bottom-color: var(--copper); }

/* ============ CHICAGO / LOCAL ============ */
.section-chicago {
  background: var(--bg-base);
  position: relative;
}

.chicago-scene {
  position: absolute;
  bottom: 40px;
  left: 0;
  right: 0;
  height: 180px;
  opacity: 0.25;
  pointer-events: none;
}

.chicago-skyline { width: 100%; height: 100%; }

.skyline-pins .ping {
  transform-origin: center;
  animation: ping 2.5s ease-out infinite;
}

.skyline-pin:nth-child(2) .ping { animation-delay: 0.6s; }
.skyline-pin:nth-child(3) .ping { animation-delay: 1.2s; }

@keyframes ping {
  0% { r: 4; opacity: 1; }
  100% { r: 24; opacity: 0; }
}

.chicago-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.chicago-card {
  padding: 30px 24px;
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all 0.4s var(--ease-out);
}

.chicago-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.5);
}

.chicago-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 500;
  color: var(--copper);
  opacity: 0.4;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  line-height: 1;
}

.chicago-card h3 {
  font-size: 1.08rem;
  margin-bottom: 10px;
}

.chicago-card p {
  font-size: 0.92rem;
  line-height: 1.65;
}

/* ============ FAQ ============ */
.section-faq {
  background: linear-gradient(180deg, var(--bg-base) 0%, #0a1428 100%);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--grad-card);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item[open] { border-color: var(--border-strong); }

.faq-item summary {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  list-style: none;
  transition: background 0.3s;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary:hover { background: rgba(91, 141, 239, 0.04); }

.faq-q {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink-0);
  line-height: 1.4;
}

.faq-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: rgba(91, 141, 239, 0.1);
  border-radius: 50%;
  flex-shrink: 0;
  color: var(--blue-1);
  transition: transform 0.4s var(--ease-out), background 0.3s;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: rgba(232, 167, 96, 0.15);
  color: var(--copper);
}

.faq-icon svg { width: 16px; height: 16px; }

.faq-a {
  padding: 0 28px 24px;
  overflow: hidden;
  animation: faqOpen 0.4s var(--ease-out);
}

.faq-a p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--ink-2);
}

@keyframes faqOpen {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ CTA SECTION ============ */
.section-cta {
  background: var(--grad-cta);
  position: relative;
  padding: 140px 0;
  text-align: center;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cta-pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 1px solid var(--blue-1);
  opacity: 0;
  animation: ctaPulse 3.5s ease-out infinite;
}

.cta-pulse.p2 { animation-delay: 1.2s; border-color: var(--copper); }
.cta-pulse.p3 { animation-delay: 2.4s; border-color: var(--green); }

@keyframes ctaPulse {
  0% { width: 120px; height: 120px; opacity: 0.8; }
  100% { width: 900px; height: 900px; opacity: 0; }
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.08;
  margin-bottom: 22px;
}

.cta-lead {
  font-size: 1.12rem;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 40px;
}

.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.cta-trust {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

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

/* ============ FOOTER ============ */
.footer {
  background: var(--bg-deep);
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border-soft);
}

.footer-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(91, 141, 239, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 141, 239, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.3;
  animation: gridDrift 30s linear infinite;
  pointer-events: none;
}

@keyframes gridDrift {
  from { background-position: 0 0; }
  to { background-position: 48px 48px; }
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--border-soft);
  position: relative;
}

.footer-brand { max-width: 320px; }

.footer-brand .brand { margin-bottom: 18px; }

.footer-tag {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-3);
}

.footer-contact h4,
.footer-links h4,
.footer-social h4 {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 18px;
}

.footer-contact p,
.footer-links li {
  font-size: 0.94rem;
  color: var(--ink-2);
  margin-bottom: 10px;
}

.footer-links ul { list-style: none; }
.footer-links a:hover { color: var(--ink-0); }

.social-row { display: flex; gap: 10px; }

.social-link {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: rgba(91, 141, 239, 0.06);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  color: var(--ink-2);
  transition: all 0.3s var(--ease-out);
}

.social-link:hover {
  color: var(--ink-0);
  border-color: var(--blue-1);
  background: rgba(91, 141, 239, 0.12);
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
}

.footer-bottom p { font-size: 0.86rem; color: var(--ink-3); }
.footer-legal { max-width: 500px; text-align: right; }

/* ============ BACK TO TOP ============ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--grad-card);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--blue-1);
  display: grid;
  place-items: center;
  z-index: 50;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.4s var(--ease-out);
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.6);
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-4px);
  background: rgba(91, 141, 239, 0.15);
  color: var(--copper);
  border-color: var(--copper);
}

/* ============ REVEAL ANIMATIONS ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.blueprint-reveal {
  opacity: 0;
  transition: opacity 1.2s var(--ease-out);
}

.blueprint-reveal.in { opacity: 0.6; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1080px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .chicago-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 860px) {
  .section { padding: 90px 0; }
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: grid; place-items: center; }
  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero-title { font-size: clamp(2.4rem, 10vw, 3.6rem); }
  .house-wireframe { display: none; }
  .intro-grid { grid-template-columns: 1fr; gap: 40px; }
  .spec-card { position: static; }
  .xray-house { display: none; }
  .problems-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: 1fr; }
  .timeline { padding-left: 30px; }
  .timeline-item { padding-left: 40px; }
  .timeline-marker { left: -34px; width: 34px; height: 34px; font-size: 0.72rem; }
  .chicago-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-legal { text-align: left; }
  .benefits-float, .cta-bg, .chicago-scene { display: none; }
}

@media (max-width: 480px) {
  .container { padding-inline: 20px; }
  .hero-meta { gap: 20px; }
  .meta-num { font-size: 1.35rem; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .process-steps { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .section-title { font-size: clamp(1.75rem, 7vw, 2.4rem); }
  .back-to-top { bottom: 16px; right: 16px; width: 44px; height: 44px; }
}