@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap");

:root {
  --paper: #f4ecde;
  --paper-strong: #efe3d0;
  --ink: #102033;
  --ink-soft: rgba(16, 32, 51, 0.74);
  --line: rgba(16, 32, 51, 0.12);
  --panel: rgba(255, 255, 255, 0.56);
  --shadow: 0 18px 60px rgba(20, 28, 36, 0.1);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --network: #d44b3e;
  --storage: #12646d;
  --analytics: #c28716;
  --messaging: #2b4fd6;
  --orchestration: #6a3fc8;
  --product: #17825d;
  --muted-chip: rgba(16, 32, 51, 0.06);
  --success: #17825d;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.85), transparent 26%),
    radial-gradient(circle at 80% 12%, rgba(23, 130, 93, 0.09), transparent 22%),
    radial-gradient(circle at 15% 85%, rgba(43, 79, 214, 0.08), transparent 22%),
    linear-gradient(180deg, #f9f4eb 0%, var(--paper) 40%, #efe5d4 100%);
  color: var(--ink);
  font-family: "IBM Plex Sans", sans-serif;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.page-shell {
  position: relative;
  overflow-x: clip;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(16, 32, 51, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 32, 51, 0.018) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: radial-gradient(circle at center, black 60%, transparent 100%);
  opacity: 0.55;
}

.hero,
.section {
  width: min(1340px, calc(100vw - 40px));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 32px;
  padding: 38px 0 20px;
}

.hero::after {
  content: "";
  position: absolute;
  right: -70px;
  top: 26px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(16, 32, 51, 0.08);
  border-radius: 50%;
  transform: rotate(-8deg);
}

.hero__copy,
.hero__panel,
.track,
.detail-panel,
.pressure-card,
.matrix-shell,
.study-note {
  backdrop-filter: blur(10px);
  background: var(--panel);
  border: 1px solid rgba(16, 32, 51, 0.1);
  box-shadow: var(--shadow);
}

.hero__copy {
  position: relative;
  padding: 34px;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.hero__copy::before {
  content: "";
  position: absolute;
  inset: auto auto 0 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--network),
    var(--storage),
    var(--analytics),
    var(--messaging),
    var(--orchestration),
    var(--product)
  );
}

.eyebrow,
.section__eyebrow,
.hero__panel-label,
.search__label,
.study-note__eyebrow {
  margin: 0 0 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.77rem;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.hero h1,
.section__heading h2 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.hero h1 {
  max-width: 11ch;
  font-size: clamp(3.6rem, 7vw, 7rem);
}

.hero__lede,
.section__heading p,
.detail-panel__summary,
.detail-panel__body,
.study-note__list {
  color: var(--ink-soft);
  line-height: 1.7;
}

.hero__lede {
  max-width: 60ch;
  margin: 24px 0 0;
  font-size: 1.06rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button--solid {
  background: var(--ink);
  color: #f8f4eb;
}

.button--ghost {
  border: 1px solid rgba(16, 32, 51, 0.18);
  background: rgba(255, 255, 255, 0.58);
}

.hero__panel {
  padding: 28px;
  border-radius: var(--radius-xl);
  align-self: start;
  position: relative;
  top: 16px;
}

.hero__stats {
  display: grid;
  gap: 12px;
}

.stat-card {
  position: relative;
  overflow: hidden;
  padding: 16px 18px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(16, 32, 51, 0.08);
}

.stat-card::after {
  content: "";
  position: absolute;
  inset: auto 16px 0 16px;
  height: 3px;
  border-radius: 999px;
  background: var(--accent, var(--ink));
}

.stat-card__value {
  font-family: "Fraunces", serif;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.05em;
}

.stat-card__label {
  margin-top: 6px;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.hero__note {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(16, 32, 51, 0.1);
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: 0.96rem;
}

.section {
  padding: 34px 0;
}

.section__heading {
  max-width: 70ch;
  margin-bottom: 22px;
}

.section__heading h2 {
  font-size: clamp(2.4rem, 4.2vw, 4rem);
  margin-bottom: 12px;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 16px;
  align-items: end;
  margin-bottom: 22px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chip {
  border: 1px solid rgba(16, 32, 51, 0.12);
  background: rgba(255, 255, 255, 0.65);
  color: var(--ink);
  padding: 11px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.filter-chip:hover,
.filter-chip:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(16, 32, 51, 0.22);
}

.filter-chip.is-active {
  background: var(--ink);
  color: #f7f2e9;
  border-color: var(--ink);
}

.search {
  display: grid;
  gap: 8px;
}

.search input {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid rgba(16, 32, 51, 0.12);
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  outline: none;
}

.search input:focus {
  border-color: rgba(16, 32, 51, 0.36);
  box-shadow: 0 0 0 4px rgba(16, 32, 51, 0.06);
}

.atlas-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 22px;
  align-items: start;
}

.track-map {
  display: grid;
  gap: 18px;
}

.empty-state {
  padding: 22px 24px;
  border-radius: var(--radius-xl);
  border: 1px dashed rgba(16, 32, 51, 0.18);
  background: rgba(255, 255, 255, 0.56);
}

.empty-state h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: 1.8rem;
  letter-spacing: -0.04em;
}

.empty-state p:last-child,
.empty-state__eyebrow {
  color: var(--ink-soft);
}

.empty-state__eyebrow {
  margin: 0 0 10px;
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
}

.track {
  padding: 22px 22px 18px;
  border-radius: var(--radius-xl);
}

.track__header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: baseline;
  margin-bottom: 18px;
}

.track__title {
  margin: 0;
  font-size: 1.22rem;
  font-weight: 700;
}

.track__meta {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.track__line {
  position: relative;
  display: grid;
  gap: 14px;
}

.track__line::before {
  content: "";
  position: absolute;
  left: 26px;
  right: 26px;
  top: 31px;
  height: 4px;
  border-radius: 999px;
  background: var(--track-color, var(--ink));
  opacity: 0.6;
}

.track__stations {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 12px;
  position: relative;
}

.station {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  min-width: 154px;
  max-width: 1fr;
  padding: 14px 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(16, 32, 51, 0.12);
  background: rgba(255, 255, 255, 0.82);
  cursor: pointer;
  text-align: left;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
}

.station:hover,
.station:focus-visible {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--track-color, var(--ink)) 55%, white);
  box-shadow: 0 16px 28px rgba(16, 32, 51, 0.08);
}

.station.is-selected {
  border-color: var(--track-color, var(--ink));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--track-color, var(--ink)) 16%, transparent);
}

.station.is-hidden {
  opacity: 0.24;
  filter: grayscale(0.2);
}

.station__head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.station__number {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 50%;
  background: var(--track-color, var(--ink));
  color: #fff8ef;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  font-weight: 500;
}

.station__lane {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.station__title {
  margin: 0;
  font-weight: 700;
  line-height: 1.28;
  font-size: 0.96rem;
}

.station__focus {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.89rem;
  line-height: 1.5;
}

.detail-panel {
  position: sticky;
  top: 18px;
  padding: 26px;
  border-radius: var(--radius-xl);
}

.detail-panel__eyebrow {
  margin: 0 0 10px;
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  color: var(--ink-soft);
}

.detail-panel h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: clamp(2rem, 3vw, 2.8rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.detail-panel__summary {
  margin: 16px 0 0;
  font-size: 1rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0;
}

.detail-card {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(16, 32, 51, 0.08);
}

.detail-card__label {
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.68rem;
  color: var(--ink-soft);
}

.detail-card__value {
  margin-top: 5px;
  font-weight: 600;
  line-height: 1.45;
}

.detail-panel__block {
  margin-top: 18px;
}

.detail-panel__block h4 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.detail-panel__list {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--muted-chip);
  font-size: 0.9rem;
}

.detail-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.detail-panel__actions a {
  text-decoration: none;
}

.pressure-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pressure-card {
  border-radius: 24px;
  padding: 20px;
}

.pressure-card__head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.pressure-card__title {
  margin: 0;
  font-size: 1.15rem;
}

.pressure-card__count {
  display: inline-grid;
  place-items: center;
  min-width: 42px;
  min-height: 42px;
  padding: 0 12px;
  border-radius: 999px;
  font-family: "Fraunces", serif;
  font-size: 1.2rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(16, 32, 51, 0.1);
}

.pressure-card__bar {
  margin-top: 14px;
  height: 8px;
  border-radius: 999px;
  background: rgba(16, 32, 51, 0.08);
  overflow: hidden;
}

.pressure-card__bar > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent, var(--ink));
}

.pressure-card__questions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.question-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(16, 32, 51, 0.1);
  background: rgba(255, 255, 255, 0.76);
  cursor: pointer;
}

.question-pill__id {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.matrix-shell {
  border-radius: 28px;
  padding: 18px;
  overflow: auto;
}

.coverage-matrix {
  min-width: 960px;
  display: grid;
  grid-template-columns: 220px repeat(14, minmax(54px, 1fr));
  gap: 8px;
}

.matrix-corner,
.matrix-pattern,
.matrix-question,
.matrix-cell {
  min-height: 54px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  text-align: center;
}

.matrix-corner,
.matrix-pattern,
.matrix-question {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(16, 32, 51, 0.08);
}

.matrix-corner {
  place-items: start;
  padding: 14px;
  text-align: left;
  font-weight: 700;
}

.matrix-pattern {
  padding: 0 14px;
  justify-items: start;
  text-align: left;
  font-weight: 600;
}

.matrix-question {
  cursor: pointer;
  gap: 4px;
  padding: 10px 6px;
}

.matrix-question__id {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.matrix-question__title {
  font-size: 0.76rem;
  line-height: 1.25;
}

.matrix-question.is-selected {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(16, 32, 51, 0.08);
}

.matrix-cell {
  border: 1px solid rgba(16, 32, 51, 0.08);
  background: rgba(255, 255, 255, 0.62);
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease, opacity 160ms ease;
}

.matrix-cell:hover,
.matrix-cell:focus-visible {
  transform: translateY(-1px);
}

.matrix-cell.is-off {
  cursor: default;
  opacity: 0.35;
}

.matrix-cell__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent, var(--ink));
  box-shadow: 0 0 0 7px color-mix(in srgb, var(--accent, var(--ink)) 12%, transparent);
}

.section--footer-note {
  padding-bottom: 64px;
}

.study-note {
  padding: 26px;
  border-radius: var(--radius-xl);
}

.study-note__list {
  margin: 0;
  padding-left: 22px;
}

.study-note__list li + li {
  margin-top: 10px;
}

.track[data-category="Networking & Traffic Management"] {
  --track-color: var(--network);
}

.track[data-category="Storage & Query Systems"] {
  --track-color: var(--storage);
}

.track[data-category="Real-Time Analytics & Monitoring"] {
  --track-color: var(--analytics);
}

.track[data-category="Messaging & Notifications"] {
  --track-color: var(--messaging);
}

.track[data-category="Orchestration & Coordination"] {
  --track-color: var(--orchestration);
}

.track[data-category="Product & Edge Systems"] {
  --track-color: var(--product);
}

@media (max-width: 1120px) {
  .hero,
  .toolbar,
  .atlas-layout,
  .pressure-board {
    grid-template-columns: 1fr;
  }

  .hero__panel {
    top: 0;
  }

  .detail-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .hero,
  .section {
    width: min(100vw - 24px, 100%);
  }

  .hero {
    padding-top: 18px;
    gap: 18px;
  }

  .hero__copy,
  .hero__panel,
  .track,
  .detail-panel,
  .pressure-card,
  .matrix-shell,
  .study-note {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 13vw, 4.7rem);
  }

  .section__heading h2 {
    font-size: clamp(2rem, 11vw, 3rem);
    line-height: 0.98;
  }

  .track__line::before {
    left: 18px;
    right: 18px;
  }

  .station {
    min-width: 100%;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}