@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Manrope:wght@400;500;600;700;800&family=Sora:wght@500;600;700&display=swap');

:root {
  --bg: #edf6fb;
  --bg-alt: #dfeef7;
  --ink: #10273a;
  --muted: #45647a;
  --accent: #0089c7;
  --accent-2: #00b8a9;
  --accent-3: #1f4dbf;
  --signal: #ff6b4a;
  --card: rgba(255, 255, 255, 0.92);
  --line: rgba(16, 39, 58, 0.14);
  --line-strong: rgba(0, 137, 199, 0.42);
  --radius: 16px;
  --shadow-soft: 0 14px 36px rgba(18, 50, 78, 0.14);
  --shadow-card: 0 26px 58px rgba(18, 50, 78, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(820px 520px at 12% -4%, rgba(0, 184, 169, 0.13), transparent 65%),
    radial-gradient(760px 520px at 88% 0%, rgba(0, 137, 199, 0.14), transparent 66%),
    linear-gradient(180deg, var(--bg), var(--bg-alt));
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-2);
}

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 260px;
  grid-template-areas: "left content right";
  min-height: 100vh;
}

.sidebar-left,
.sidebar-right {
  grid-area: left;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: rgba(237, 246, 251, 0.84);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(16, 39, 58, 0.1);
  padding: 18px 14px 20px;
}

.sidebar-right {
  grid-area: right;
  border-right: 0;
  border-left: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.72rem;
  margin-bottom: 16px;
  padding: 8px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(0, 137, 199, 0.22);
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid rgba(0, 137, 199, 0.3);
  box-shadow: 0 10px 20px rgba(16, 60, 92, 0.16);
}

.brand .title {
  font-family: "Sora", "Century Gothic", sans-serif;
  font-size: 0.93rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
}

.brand-home {
  display: inline-block;
  line-height: 0;
}

.brand .title a {
  color: inherit;
  text-decoration: none;
}

.left-nav,
.right-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.42rem;
}

.left-nav a,
.left-nav summary.subnav {
  display: block;
  border-radius: 999px;
  padding: 0.37rem 0.78rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid transparent;
  transition: all 0.22s ease;
}

.right-nav a {
  display: block;
  border-radius: 999px;
  padding: 0.37rem 0.78rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid transparent;
  transition: none;
}

.left-nav a.subnav,
.left-nav summary.subnav {
  margin-left: 1rem;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  padding-top: 0.28rem;
  padding-bottom: 0.28rem;
  position: relative;
  padding-right: 1.6rem;
}

.left-nav-collapse {
  margin: 0;
}

.left-nav-collapse summary {
  list-style: none;
  cursor: pointer;
}

.left-nav-collapse summary::-webkit-details-marker {
  display: none;
}

.left-nav summary.subnav::after {
  content: "▸";
  position: absolute;
  right: 0.62rem;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  transform-origin: center;
  transition: transform 0.2s ease;
  font-size: 0.74rem;
  color: var(--muted);
}

.left-nav-collapse[open] > summary.subnav::after {
  transform: translateY(-50%) rotate(90deg);
}

.left-nav-collapse .nested-nav {
  margin-top: 0.22rem;
  margin-bottom: 0.06rem;
  gap: 0.2rem;
}

.left-nav .subnav-group {
  margin-left: 1.4rem;
  margin-top: 0.2rem;
  margin-bottom: 0.08rem;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.9;
}

.left-nav a.subnav2 {
  margin-left: 2rem;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  padding-top: 0.24rem;
  padding-bottom: 0.24rem;
}

.left-nav a.github-link {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.left-nav a.github-link .github-mark {
  width: 0.94rem;
  height: 0.94rem;
  flex: 0 0 auto;
}

.left-nav a.active,
.left-nav a:hover,
.left-nav summary.subnav.active,
.left-nav summary.subnav:hover,
.right-nav a.active,
.right-nav a:hover {
  color: var(--ink);
  border-color: var(--line-strong);
  background: linear-gradient(130deg, rgba(0, 137, 199, 0.14), rgba(0, 184, 169, 0.14));
}

.right-title {
  margin: 0 0 9px;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 0.69rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.content {
  grid-area: content;
  min-width: 0;
  background: #fff;
  padding: 24px 28px 34px;
}

.doc {
  max-width: 1060px;
  margin: 0 auto;
}

section {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 1.28rem;
  margin-bottom: 1rem;
}

h1 {
  margin: 0 0 0.64rem;
  font-family: "Sora", "Century Gothic", sans-serif;
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

h2 {
  margin: 0 0 0.56rem;
  font-family: "Sora", "Century Gothic", sans-serif;
  font-size: clamp(1.25rem, 2vw, 1.62rem);
}

h3 {
  margin: 0.96rem 0 0.42rem;
  font-size: 1rem;
  color: var(--ink);
}

p,
li {
  color: var(--muted);
}

ul {
  margin: 0.5rem 0 0.5rem 1.2rem;
}

code {
  background: #fff;
  border: 1px solid rgba(0, 137, 199, 0.18);
  border-radius: 6px;
  padding: 0.12em 0.4em;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 0.88em;
  color: #0d3f63;
}

pre {
  background: #fff;
  border: 1px solid rgba(0, 137, 199, 0.22);
  border-radius: 10px;
  padding: 0.86rem 0.92rem;
  overflow-x: auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.62);
}

pre code {
  border: 0;
  background: transparent;
  padding: 0;
  color: #0d3f63;
}

img,
video,
iframe {
  max-width: 100%;
  height: auto;
}

table {
  width: 100%;
  display: block;
  overflow-x: auto;
}

.pill {
  display: inline-block;
  padding: 0.18rem 0.58rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: #0f4469;
  font-size: 0.77rem;
  font-weight: 600;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.92rem;
  box-shadow: var(--shadow-soft);
}

.dataset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.dataset-card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  color: inherit;
  min-height: 190px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.dataset-card:hover {
  color: inherit;
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--line-strong);
}

.zenodo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  background: #1e5bb8;
  color: #fff;
  font-family: "Sora", "Century Gothic", sans-serif;
  font-size: 0.8rem;
  font-weight: 800;
}

.dataset-card-content {
  min-width: 0;
}

.dataset-card h2 {
  margin-bottom: 0.45rem;
  font-size: 1.05rem;
  line-height: 1.35;
}

.dataset-card p {
  margin: 0.5rem 0 0;
}

.dataset-open {
  display: inline-block;
  margin-top: 0.7rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.why-ncpi {
  position: relative;
  overflow: hidden;
  padding: clamp(1.35rem, 3vw, 2.2rem);
  background: #fff;
  border-color: rgba(0, 137, 199, 0.24);
}

.why-ncpi-intro {
  width: 100%;
  margin: 1.5rem 0 0;
}

.section-eyebrow {
  display: inline-block;
  margin-bottom: 0.6rem;
  color: var(--accent);
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.why-ncpi h2 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.55rem, 2.7vw, 2.15rem);
  line-height: 1.18;
}

.why-ncpi-lead {
  margin: -0.35rem 0 1.15rem;
  color: var(--muted);
  font-size: 1.02rem;
  font-weight: 500;
  line-height: 1.55;
}

.why-ncpi-intro p:last-child {
  margin: 0;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 1.35rem 0;
}

.capability-card {
  padding: 0.2rem 1rem 0.2rem 0.8rem;
  border-left: 3px solid rgba(0, 137, 199, 0.28);
  background: #fff;
}

.capability-card h3 {
  margin: 0 0 0.35rem;
  color: #0d3f63;
  font-family: "Sora", "Century Gothic", sans-serif;
}

.capability-card p,
.why-ncpi-footer {
  margin: 0;
}

.why-ncpi-footer {
  padding-top: 1rem;
  border-top: 1px solid rgba(0, 137, 199, 0.2);
}

#start-here {
  margin-top: 1.35rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(0, 137, 199, 0.2);
}

#start-here p {
  margin-bottom: 0;
}

.tutorial-option {
  display: block;
  color: inherit;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  min-height: 420px;
  padding: 1.15rem;
}

.tutorial-option:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--line-strong);
}

.tutorial-option img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid var(--line);
  margin-bottom: 0.8rem;
  background: #fff;
}

.card-grid.tutorial-options {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.tutorial-option h2 {
  margin-bottom: 0.42rem;
}

.link {
  color: var(--accent);
  border-bottom: 1px solid rgba(0, 137, 199, 0.3);
}

.link:hover {
  color: var(--accent-2);
  border-bottom-color: rgba(0, 184, 169, 0.45);
}

/* API page readability */
.api-doc section > p {
  margin: 0.4rem 0;
}

.api-doc section > ul {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.74rem;
}

.api-doc section > ul > li {
  margin: 0;
  padding: 0.82rem 0.9rem;
  border: 1px solid rgba(0, 137, 199, 0.2);
  border-radius: 8px;
  background: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
  line-height: 1.55;
}

.api-doc section > ul > li > code:first-child {
  display: block;
  width: 100%;
  margin: 0 0 0.34rem;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.8rem;
  font-weight: 600;
}

.api-doc section > ul > li > .link {
  display: inline-block;
  margin: 0 0 0.42rem;
}

.api-doc section > ul > li br {
  display: block;
  margin: 0.2rem 0 0;
  content: "";
}

.api-params-block {
  margin-top: 0.62rem;
  padding-top: 0.52rem;
  border-top: 1px dashed rgba(0, 137, 199, 0.28);
}

.api-params-title {
  display: inline-block;
  margin-bottom: 0.34rem;
  padding: 0.16rem 0.52rem;
  border: 1px solid rgba(0, 137, 199, 0.34);
  border-radius: 999px;
  background: #fff;
  color: #0f4469;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.api-params-list {
  list-style: none;
  margin: 0.18rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.24rem;
}

.api-params-list li {
  margin: 0;
  color: var(--muted);
}

.api-params-list li code {
  margin-right: 0.22rem;
}

.api-param-type {
  display: inline-block;
  margin-left: 0.26rem;
  padding: 0.04rem 0.35rem;
  border: 1px solid rgba(31, 77, 191, 0.26);
  border-radius: 999px;
  background: #fff;
  color: #1f4dbf;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

@media (max-width: 1040px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "left"
      "content"
      "right";
  }

  .sidebar-left,
  .sidebar-right {
    position: static;
    height: auto;
    border: 0;
    border-bottom: 1px solid var(--line);
  }

  .content {
    padding: 16px;
  }

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

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

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

  .card-grid.tutorial-options {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .content {
    padding: 12px;
  }

  section {
    padding: 1rem;
  }

  .brand {
    margin-bottom: 12px;
  }

  .left-nav a,
  .left-nav summary.subnav,
  .right-nav a {
    font-size: 0.84rem;
    padding: 0.34rem 0.66rem;
  }

  .left-nav a.subnav2 {
    margin-left: 1.5rem;
    font-size: 0.76rem;
  }

  .tutorial-option {
    min-height: auto;
    padding: 0.95rem;
  }

  .tutorial-option img {
    height: 200px;
  }

  pre {
    padding: 0.78rem;
  }
}