/* Containment Radar — dark variant of the Celeborn lattice brand */

:root {
  --bg: #12161b;
  --bg-elevated: #1a1f26;
  --bg-panel: #212830;
  --bg-input: #0e1216;
  --line: rgba(243, 241, 235, 0.1);
  --line-strong: rgba(243, 241, 235, 0.22);
  --text: #f3f1eb;
  --text-muted: #c3c7cc;
  --text-soft: #939aa2;
  --steel: #919191;
  --steel-dim: #4a5057;
  --accent: #6fa7b0;
  --accent-bright: #8fc6ce;
  --accent-wash: rgba(111, 167, 176, 0.14);
  --on-accent: #0f1418;
  --stone-fill: #e9e6df;
  --focus: #8fc6ce;
  --radius: 12px;
  --page: 78rem;
  --space: clamp(1.25rem, 3vw, 2rem);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", "Segoe UI Mono", "Cascadia Code", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(1000px 520px at 85% -10%, rgba(111, 167, 176, 0.12), transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-bright);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--text);
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

h1,
h2,
h3 {
  margin: 0 0 0.6rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 620;
}

p {
  margin: 0 0 1rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 0;
  z-index: 200;
  padding: 0.7rem 1rem;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  transform: translateY(-140%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- header ---------- */

.radar-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(18, 22, 27, 0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.radar-header::before {
  content: "";
  display: block;
  height: 2px;
  background: var(--accent);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: var(--page);
  margin: 0 auto;
  padding: 0.7rem var(--space);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-radius: 4px;
}

.brand-lockup {
  height: 42px;
  width: auto;
}

.product-name {
  padding-left: 1rem;
  border-left: 1px solid var(--line-strong);
  color: var(--text-muted);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  gap: 1.2rem;
  margin-left: auto;
}

.header-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  white-space: nowrap;
}

.header-nav a:hover {
  color: var(--text);
}

/* ---------- masthead ---------- */

.masthead,
.workbench,
.how,
.footer-inner {
  max-width: var(--page);
  margin: 0 auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

.masthead {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.tagline {
  margin: 0 0 1.2rem;
  color: var(--text-muted);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  font-weight: 500;
}

.tagline::before {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  margin-bottom: 0.9rem;
  background: var(--accent);
}

.masthead h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
}

.lede {
  max-width: 48rem;
  color: var(--text-muted);
  font-size: 1.08rem;
}

/* ---------- workbench layout ---------- */

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1.25rem;
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.inputs,
.results {
  min-width: 0;
}

.panel-title {
  margin: 0 0 0.9rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-bright);
}

/* ---------- inputs ---------- */

.field {
  margin-bottom: 1.1rem;
}

.field-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.4rem;
}

.field-head label,
details.field summary {
  font-weight: 600;
  font-size: 0.95rem;
}

.field-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-soft);
}

.dropzone {
  position: relative;
  border-radius: 10px;
}

.dropzone.is-dragging textarea {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-wash);
}

textarea {
  display: block;
  width: 100%;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--bg-input);
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
  line-height: 1.55;
  resize: vertical;
}

textarea::placeholder {
  color: var(--text-soft);
}

textarea:focus-visible {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-wash);
}

.field-tools {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.45rem;
}

.file-button,
.link-button {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent-bright);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}

.file-button:hover,
.link-button:hover {
  color: var(--text);
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-button:focus-within {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

details.field {
  padding: 0.6rem 0.9rem 0.9rem;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
}

details.field summary {
  cursor: pointer;
  color: var(--text-muted);
  list-style: none;
  min-height: 32px;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

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

details.field summary::before {
  content: "+";
  display: inline-grid;
  place-items: center;
  width: 1.3rem;
  height: 1.3rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--accent-bright);
}

details.field[open] summary::before {
  content: "–";
}

details.field[open] summary {
  margin-bottom: 0.7rem;
}

.samples {
  margin: 0 0 1.1rem;
  padding: 0.9rem 0.95rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
}

.samples legend {
  padding: 0 0.4rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.sample-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.sample {
  min-height: 34px;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
}

.sample:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.sample.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.sample-hint {
  margin: 0.75rem 0 0;
  color: var(--text-soft);
  font-size: 0.88rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 0.8rem;
}

.controls label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

select {
  min-height: 44px;
  padding: 0 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--bg-input);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1.15rem;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.button-primary:hover {
  background: var(--accent-bright);
}

.status {
  margin: 0.8rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-soft);
}

/* ---------- radar ---------- */

.radar-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, var(--accent-wash), transparent 45%),
    var(--bg-elevated);
}

.radar-viz svg {
  width: min(100%, 300px);
  height: auto;
  margin: 0 auto;
}

.radar-bg {
  fill: var(--bg-input);
  stroke: var(--line);
}

.radar-ring {
  fill: none;
  stroke: var(--line);
  stroke-dasharray: 2 4;
}

.band {
  fill: var(--steel-dim);
  opacity: 0.55;
  transition: fill 0.2s ease, opacity 0.2s ease;
}

.band.lit {
  fill: var(--accent);
  opacity: 1;
}

.row {
  stroke: var(--steel-dim);
  stroke-width: 1.4;
  opacity: 0.55;
}

.row.lit {
  stroke: var(--accent-bright);
  opacity: 1;
}

.sweep {
  stroke: var(--accent-bright);
  stroke-width: 1.2;
  opacity: 0.5;
  transform-origin: 160px 160px;
  animation: sweep 6s linear infinite;
}

svg.is-idle .sweep {
  opacity: 0.18;
}

@keyframes sweep {
  to {
    transform: rotate(360deg);
  }
}

.center-big {
  fill: var(--text);
  font-family: var(--font);
  font-size: 36px;
  font-weight: 620;
  letter-spacing: -0.02em;
}

.center-small {
  fill: var(--text-soft);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.radar-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.radar-target {
  margin: 0.15rem 0 0.9rem;
  font-weight: 620;
  font-size: 1.05rem;
}

.radar-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem 1rem;
  margin: 0 0 0.9rem;
}

.radar-stats div {
  padding-top: 0.45rem;
  border-top: 1px solid var(--line);
}

.radar-stats dt {
  font-size: 0.75rem;
  color: var(--text-soft);
}

.radar-stats dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--text);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.8rem;
  color: var(--text-soft);
}

.legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.swatch {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 2px;
  background: var(--steel-dim);
}

.swatch-lit {
  background: var(--accent);
}

.swatch-row {
  width: 0.25rem;
  background: var(--accent-bright);
}

/* ---------- badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 5.6rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.badge-near {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.badge-contains {
  background: var(--stone-fill);
  border-color: var(--stone-fill);
  color: var(--on-accent);
}

.badge-clear {
  border-color: var(--line-strong);
  color: var(--text-soft);
}

.badge-empty {
  border-style: dashed;
  border-color: var(--line-strong);
  color: var(--text-soft);
}

/* ---------- pair card & hits ---------- */

.pair-card {
  margin-top: 1rem;
}

.pair-button,
.hit-button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.pair-button:hover,
.hit-button:hover {
  border-color: var(--line-strong);
}

.pair-card.is-selected .pair-button,
.hit.is-selected .hit-button {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.pair-copy,
.hit-copy {
  display: grid;
  gap: 0.1rem;
  min-width: 0;
}

.pair-copy span,
.hit-meta {
  font-size: 0.82rem;
  color: var(--text-soft);
}

.hit-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.hits {
  margin-top: 1.25rem;
}

.hits-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.3rem 1rem;
  margin-bottom: 0.6rem;
}

.hits-head h3 {
  margin: 0;
  font-size: 1rem;
}

.hits-summary {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-soft);
}

.hit-list {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hit-button {
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.hit-scores {
  display: flex;
  gap: 0.9rem;
}

.score {
  font-size: 0.72rem;
  color: var(--text-soft);
  white-space: nowrap;
}

.score b {
  display: block;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text);
}

.score-lsh b {
  color: var(--accent-bright);
}

.hits-empty {
  margin: 0;
  padding: 1rem 0.95rem;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  color: var(--text-soft);
  font-size: 0.92rem;
}

/* ---------- detail ---------- */

.detail {
  margin-top: 1.25rem;
  padding: 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
}

.detail-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 0.9rem;
  margin-bottom: 1rem;
}

.detail-head h3 {
  margin: 0 0 0.2rem;
  font-size: 1.05rem;
}

.detail-sub {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.text-block + .text-block {
  margin-top: 0.9rem;
}

.text-block-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.3rem 1rem;
  margin-bottom: 0.35rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.text-block-body {
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-input);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-muted);
  white-space: pre-wrap;
  max-height: 16rem;
  overflow: auto;
}

.text-block-body mark {
  background: var(--accent-wash);
  color: var(--text);
  box-shadow: inset 0 -1.5px 0 var(--accent);
  border-radius: 2px;
  padding: 0 1px;
}

/* ---------- how it works ---------- */

.how {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
}

.how h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin-bottom: 1.4rem;
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 1.2rem;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.how-steps li {
  padding: 1.1rem 1.1rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  counter-increment: step;
}

.how-steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  margin-bottom: 0.8rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent-bright);
}

.how-steps h3 {
  font-size: 1.02rem;
}

.how-steps p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.thresholds {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-soft);
}

/* ---------- footer ---------- */

.radar-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-input);
  padding: 1.8rem 0 2.2rem;
}

.disclaimer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0;
  margin: 0 0 0.9rem;
  padding: 0;
  list-style: none;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.disclaimer li + li::before {
  content: "·";
  margin: 0 0.6rem;
  color: var(--accent);
}

.footer-legal {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-soft);
}

.footer-legal a {
  margin-left: 0.4rem;
}

/* ---------- responsive ---------- */

@media (max-width: 1000px) {
  .workbench {
    grid-template-columns: 1fr;
  }

  .how-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .product-name {
    display: none;
  }

  .brand-lockup {
    height: 32px;
  }

  .header-nav {
    gap: 0.9rem;
  }

  .header-nav a {
    font-size: 0.9rem;
  }

  .radar-card,
  .how-steps {
    grid-template-columns: 1fr;
  }

  .hit-button {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .hit-scores {
    grid-column: 1 / -1;
    justify-content: space-between;
  }

  .radar-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .sweep {
    animation: none;
  }

  .band {
    transition: none;
  }
}