:root {
  --ink: #142028;
  --ink-soft: #3a4a52;
  --paper: #f3f6f2;
  --paper-2: #e7efe9;
  --teal: #1f6f6a;
  --teal-deep: #14343a;
  --ember: #c45c26;
  --line: rgba(20, 32, 40, 0.12);
  --shadow: 0 24px 60px rgba(20, 52, 58, 0.12);
  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 700px at 12% -10%, rgba(31, 111, 106, 0.16), transparent 55%),
    radial-gradient(900px 600px at 92% 8%, rgba(196, 92, 38, 0.12), transparent 50%),
    linear-gradient(180deg, #f7faf7 0%, var(--paper) 42%, #eef4f0 100%);
  overflow-x: hidden;
}

.atmosphere {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 32, 40, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 32, 40, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 25%, transparent 75%);
  z-index: 0;
}

.top,
main,
.foot {
  position: relative;
  z-index: 1;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  min-height: calc(100vh - 4.5rem);
  padding: 0 clamp(1.25rem, 4vw, 3rem) 3rem;
}

.brand-mark {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  letter-spacing: -0.03em;
  color: var(--teal-deep);
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 5.6vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.lede {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.55;
  color: var(--ink-soft);
}

.resolve {
  display: flex;
  gap: 0.65rem;
  align-items: stretch;
  max-width: 36rem;
  animation: rise 0.8s ease both;
  animation-delay: 0.15s;
}

.resolve input {
  flex: 1;
  min-width: 0;
  border: 1.5px solid var(--ink);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  padding: 0.95rem 1.1rem;
  font: 600 1rem/1.2 var(--font-display);
  border-radius: 2px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.resolve input::placeholder {
  color: #7a8a90;
  font-weight: 500;
}

.resolve input:focus {
  border-color: var(--teal);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(31, 111, 106, 0.18);
}

.resolve button {
  border: 1.5px solid var(--teal-deep);
  background: var(--teal-deep);
  color: #f4f7f5;
  padding: 0.95rem 1.25rem;
  font: 700 0.95rem/1.1 var(--font-display);
  letter-spacing: -0.01em;
  border-radius: 2px;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.18s ease, background 0.18s ease;
}

.resolve button:hover {
  background: var(--teal);
  border-color: var(--teal);
  transform: translateY(-1px);
}

.resolve button:active {
  transform: translateY(0);
}

.form-note {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  color: var(--teal-deep);
}

.form-note[data-tone="error"] {
  color: #9b2c1a;
}

.resolve button:disabled {
  opacity: 0.7;
  cursor: wait;
  transform: none;
}

.progress {
  margin-top: 1.25rem;
  max-width: 36rem;
  animation: rise 0.4s ease both;
}

.progress-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.55rem;
}

.progress-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--teal-deep);
}

.progress-pct {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.progress-track {
  height: 8px;
  border: 1px solid var(--ink);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--teal-deep), var(--teal) 55%, #c45c26);
  transition: width 0.25s ease;
}

.progress-steps {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.progress-steps li {
  position: relative;
  padding-left: 1.15rem;
  font-family: var(--font-display);
  font-size: 0.88rem;
  color: #8a9aa0;
  transition: color 0.2s ease;
}

.progress-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 1px;
  background: #c5d0d3;
}

.progress-steps li.is-active {
  color: var(--teal-deep);
  font-weight: 600;
}

.progress-steps li.is-active::before {
  background: var(--teal);
  box-shadow: 0 0 0 3px rgba(31, 111, 106, 0.18);
}

.progress-steps li.is-done {
  color: var(--ink-soft);
}

.progress-steps li.is-done::before {
  background: var(--teal-deep);
}

.results {
  margin-top: 1.75rem;
  max-width: 36rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  animation: rise 0.45s ease both;
}

.results h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem 1.25rem;
}

.result-grid dt,
.result-grid .label {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: block;
}

.result-grid dd,
.result-grid .value {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  word-break: break-word;
  display: block;
}

.result-grid a {
  color: var(--teal-deep);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.badge {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border: 1px solid var(--teal);
  color: var(--teal-deep);
  font-size: 0.82rem;
  border-radius: 2px;
}

.evidence {
  margin: 1rem 0 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.45;
}

.result-empty,
.result-error {
  margin: 0;
  font-family: var(--font-display);
}

.result-error {
  color: #9b2c1a;
}

@media (max-width: 560px) {
  .result-grid {
    grid-template-columns: 1fr;
  }
}

.hero-visual {
  position: relative;
  min-height: 320px;
  animation: fade-in 1s ease both;
}

.signal-map {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(var(--shadow));
}

.signal-map .label {
  fill: var(--ink-soft);
  font-size: 14px;
  font-family: var(--font-display), sans-serif;
  font-weight: 600;
}

.path {
  stroke-dasharray: 420;
  stroke-dashoffset: 420;
  animation: draw 1.6s ease forwards;
}

.path-a { animation-delay: 0.2s; }
.path-b { animation-delay: 0.45s; }
.path-c { animation-delay: 0.7s; }
.path-d { animation-delay: 0.55s; }

.node {
  opacity: 0;
  animation: pop 0.5s ease forwards;
}

.node-in { animation-delay: 0.35s; }
.node-core { animation-delay: 0.7s; }
.node-out { animation-delay: 1s; }
.node-out-b { animation-delay: 1.15s; }
.node-out-c { animation-delay: 0.9s; }

.pulse-ring {
  transform-origin: center;
  transform-box: fill-box;
  animation: pulse 2.4s ease-out infinite;
  animation-delay: 1.2s;
}

.strip {
  margin: 0 clamp(1.25rem, 4vw, 3rem) 4rem;
  padding: 2.5rem 0 0;
  border-top: 1px solid var(--line);
}

.strip h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.03em;
}

.strip-lede {
  margin: 0 0 1.5rem;
  max-width: 36rem;
  color: var(--ink-soft);
}

.outputs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.outputs li {
  padding: 1.25rem 1rem 1.25rem 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}

.outputs li + li {
  padding-left: 1rem;
  border-left: 1px solid var(--line);
}

.foot {
  padding: 1.5rem clamp(1.25rem, 4vw, 3rem) 2.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  font-size: 0.92rem;
}

.foot .muted {
  color: var(--ink-soft);
  margin: 0;
}

.foot p {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

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

@keyframes pop {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0% { opacity: 0.9; stroke-width: 2; }
  100% { opacity: 0; stroke-width: 10; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 1rem;
  }

  .hero-visual {
    order: -1;
    max-width: 560px;
  }

  .outputs {
    grid-template-columns: 1fr 1fr;
  }

  .outputs li + li {
    border-left: none;
    padding-left: 0;
  }

  .outputs li:nth-child(even) {
    padding-left: 1rem;
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  .resolve {
    flex-direction: column;
  }

  .outputs {
    grid-template-columns: 1fr;
  }

  .outputs li:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .top .brand {
    font-size: 0.92rem;
  }
}