/* Day 19 — Signal Atlas */

:root {
  color-scheme: dark;
  --bg: #041018;
  --bg-deep: #02070d;
  --panel: rgba(4, 13, 21, 0.82);
  --panel-soft: rgba(4, 13, 21, 0.46);
  --line: rgba(138, 241, 255, 0.18);
  --line-strong: rgba(138, 241, 255, 0.42);
  --text: #f5fcff;
  --text-soft: rgba(214, 237, 243, 0.7);
  --accent: #89efff;
  --accent-soft: rgba(137, 239, 255, 0.14);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
}

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

html,
body {
  margin: 0;
  height: 100%;
}

body {
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(78, 196, 255, 0.18), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(76, 112, 255, 0.14), transparent 24%),
    linear-gradient(145deg, #02070d 0%, #03111a 48%, #020a11 100%);
  color: var(--text);
  font-family: "Manrope", "Segoe UI", sans-serif;
}

.atlas-shell {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
}

.atlas-shell::before,
.atlas-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.atlas-shell::before {
  background:
    radial-gradient(circle at 50% 52%, rgba(83, 207, 255, 0.18), transparent 18%),
    radial-gradient(circle at 50% 54%, rgba(83, 207, 255, 0.08), transparent 32%);
  filter: blur(18px);
  opacity: 0.9;
}

.atlas-shell::after {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 14%),
    radial-gradient(circle at center, transparent 52%, rgba(0, 0, 0, 0.35) 100%);
  opacity: 0.8;
}

.scene-noise {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 4.75rem 4.75rem;
  mask-image: radial-gradient(circle at center, black 24%, transparent 88%);
  opacity: 0.16;
  pointer-events: none;
}

#atlas-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  touch-action: none;
}

body.is-dragging #atlas-canvas {
  cursor: grabbing;
}

.masthead,
.detail-rail,
.hub-strip,
.no-script {
  position: absolute;
  z-index: 2;
}

.masthead {
  top: clamp(1.2rem, 3vw, 2.2rem);
  left: clamp(1.2rem, 3vw, 2.2rem);
  width: min(30rem, calc(100vw - 2.4rem));
  padding-right: 3rem;
  background: linear-gradient(90deg, rgba(2, 9, 15, 0.88), rgba(2, 9, 15, 0.4) 70%, transparent);
}

.eyebrow,
.meta-strip span,
.rail-label,
.score-head span,
.hub-stats dt,
.hub-strip__label,
.route-section__head span,
.hub-picker span,
.hub-button__region {
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.eyebrow,
.rail-label,
.route-section__head span,
.hub-strip__label,
.hub-picker span {
  color: var(--accent);
  font-size: 0.72rem;
}

.masthead h1,
.detail-rail h2,
.route-section__head h3 {
  margin: 0;
  font-family: "Syne", "Segoe UI", sans-serif;
}

.eyebrow {
  margin: 0 0 0.95rem;
}

.masthead h1 {
  max-width: 8ch;
  font-size: clamp(3.2rem, 8vw, 6.4rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
}

.lede {
  max-width: 34ch;
  margin: 1rem 0 0;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.7;
}

.meta-strip,
.masthead-actions,
.hub-buttons {
  display: flex;
  flex-wrap: wrap;
}

.meta-strip {
  gap: 1rem;
  margin-top: 1.35rem;
}

.meta-strip span {
  position: relative;
  padding-right: 1rem;
  color: rgba(214, 237, 243, 0.86);
  font-size: 0.7rem;
}

.meta-strip span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 0.45rem;
  height: 1px;
  background: rgba(214, 237, 243, 0.28);
  transform: translateY(-50%);
}

.masthead-actions {
  gap: 1rem;
  align-items: center;
  margin-top: 1.35rem;
}

.text-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.text-link:hover {
  color: var(--accent);
}

.status-note {
  margin: 0;
  color: rgba(214, 237, 243, 0.84);
  font-size: 0.82rem;
}

.detail-rail {
  top: 0;
  right: 0;
  bottom: 0;
  width: min(25rem, 34vw);
  padding: clamp(1.45rem, 3vw, 2.4rem) clamp(1.2rem, 2vw, 1.9rem) clamp(1.5rem, 4vw, 2.2rem);
  display: grid;
  align-content: start;
  gap: 1.1rem;
  background:
    linear-gradient(270deg, rgba(2, 9, 15, 0.92), rgba(2, 9, 15, 0.68) 44%, rgba(2, 9, 15, 0.18) 100%);
  border-left: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.detail-rail h2 {
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 0.94;
  letter-spacing: -0.07em;
}

.hub-region,
.hub-blurb,
.hub-stats dd,
.route-list,
.route-city,
.route-region,
.route-score {
  margin: 0;
}

.hub-region {
  color: rgba(214, 237, 243, 0.76);
  font-size: 0.95rem;
}

.score-block {
  display: grid;
  gap: 0.6rem;
}

.score-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.score-head span,
.hub-stats dt {
  color: var(--text-soft);
  font-size: 0.68rem;
}

.score-head strong {
  color: var(--text);
  font-size: 1.9rem;
  line-height: 1;
}

.score-track {
  width: 100%;
  height: 0.45rem;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.07);
}

.score-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(137, 239, 255, 0.42), rgba(137, 239, 255, 0.98));
  box-shadow: 0 0 24px rgba(137, 239, 255, 0.42);
  transition: width 320ms ease;
}

.hub-blurb {
  max-width: 30ch;
  color: rgba(214, 237, 243, 0.82);
  font-size: 0.95rem;
  line-height: 1.65;
}

.hub-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hub-stats div {
  display: grid;
  gap: 0.35rem;
}

.hub-stats dd {
  color: var(--text);
  font-size: 0.96rem;
  font-weight: 700;
}

.route-section {
  display: grid;
  gap: 0.9rem;
  min-height: 0;
}

.route-section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.route-section__head h3 {
  font-size: 1.25rem;
  letter-spacing: -0.04em;
}

.route-list {
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.route-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.72rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.route-meta {
  display: grid;
  gap: 0.2rem;
}

.route-city {
  font-size: 1rem;
  font-weight: 700;
}

.route-region {
  color: var(--text-soft);
  font-size: 0.78rem;
}

.route-score {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  text-align: right;
}

.hub-picker {
  display: none;
  gap: 0.5rem;
}

.hub-picker select {
  width: 100%;
  appearance: none;
  border: 1px solid rgba(137, 239, 255, 0.24);
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(3, 14, 21, 0.88);
  color: var(--text);
  padding: 0.9rem 1rem;
  font: inherit;
}

.hub-strip {
  left: clamp(1.2rem, 3vw, 2.2rem);
  bottom: clamp(1.15rem, 3vw, 2rem);
  width: min(44rem, calc(100vw - 4rem));
  padding-top: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(0deg, rgba(2, 9, 15, 0.8), rgba(2, 9, 15, 0));
}

.hub-strip__label {
  margin: 0 0 0.85rem;
}

.hub-buttons {
  gap: 0.7rem 1rem;
}

.hub-button {
  min-width: 8.4rem;
  padding: 0;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  background: none;
  color: rgba(214, 237, 243, 0.74);
  text-align: left;
  cursor: pointer;
  transition:
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.hub-button:hover,
.hub-button:focus-visible {
  color: var(--text);
  border-color: rgba(137, 239, 255, 0.52);
  transform: translateY(-1px);
  outline: none;
}

.hub-button.is-active {
  color: var(--accent);
  border-color: rgba(137, 239, 255, 0.78);
}

.hub-button__city {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.hub-button__region {
  display: block;
  margin-top: 0.25rem;
  color: inherit;
  font-size: 0.6rem;
}

.no-script {
  left: 1.2rem;
  bottom: 1.2rem;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  background: rgba(2, 9, 15, 0.94);
  box-shadow: var(--shadow);
}

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

body .masthead,
body .detail-rail,
body .hub-strip {
  opacity: 0;
  transform: translateY(20px);
}

body.is-ready .masthead,
body.is-ready .detail-rail,
body.is-ready .hub-strip {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

body.is-ready .detail-rail {
  transition-delay: 70ms;
}

body.is-ready .hub-strip {
  transition-delay: 120ms;
}

@media (max-width: 980px) {
  .masthead {
    width: min(27rem, calc(100vw - 2.4rem));
    padding-right: 0;
  }

  .detail-rail {
    width: min(22rem, 38vw);
  }

  .hub-strip {
    width: min(36rem, calc(100vw - 2.4rem));
  }
}

@media (max-width: 760px) {
  body {
    overflow: auto;
  }

  .atlas-shell {
    min-height: 100svh;
  }

  .masthead {
    top: 1rem;
    left: 1rem;
    width: min(23rem, calc(100vw - 2rem));
    background: linear-gradient(90deg, rgba(2, 9, 15, 0.9), rgba(2, 9, 15, 0.2) 88%, transparent);
  }

  .masthead h1 {
    font-size: clamp(2.85rem, 17vw, 4.2rem);
  }

  .lede {
    max-width: 30ch;
    font-size: 0.94rem;
  }

  .meta-strip {
    gap: 0.7rem;
  }

  .meta-strip span {
    padding-right: 0.8rem;
  }

  .masthead-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .detail-rail {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    max-height: min(25rem, 48svh);
    padding: 1rem 1rem 1.2rem;
    gap: 0.9rem;
    background:
      linear-gradient(180deg, rgba(2, 9, 15, 0.22), rgba(2, 9, 15, 0.92) 16%, rgba(2, 9, 15, 0.96) 100%);
    border-left: none;
    border-top: 1px solid var(--line);
    overflow: auto;
  }

  .detail-rail h2 {
    font-size: 2rem;
  }

  .hub-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .route-section {
    padding-bottom: 0.2rem;
  }

  .hub-strip {
    display: none;
  }

  .hub-picker {
    display: grid;
  }
}

@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;
  }
}