:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "IBM Plex Sans", "Noto Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 700px at 10% -10%, var(--bg-accent), transparent 60%),
    radial-gradient(1000px 600px at 100% 0%, var(--bg-accent-2), transparent 55%),
    var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

body.theme-midnight {
  --bg: #0a1118;
  --bg-soft: #101a24;
  --bg-panel: #152231;
  --bg-accent: #225b88;
  --bg-accent-2: #19475a;
  --text: #f2f7ff;
  --text-soft: #b8c6d9;
  --border: #294156;
  --link: #7cc2ff;
  --link-active: #b4e3ff;
  --shadow: rgba(0, 0, 0, 0.42);
  --code-bg: #0b1722;
}

body.theme-carbon {
  --bg: #0f1012;
  --bg-soft: #181a1f;
  --bg-panel: #20252c;
  --bg-accent: #3b4d5a;
  --bg-accent-2: #5a5f44;
  --text: #f5f5f5;
  --text-soft: #c8c8c8;
  --border: #3a4048;
  --link: #8ad8ff;
  --link-active: #ccefff;
  --shadow: rgba(0, 0, 0, 0.45);
  --code-bg: #15191f;
}

body.theme-slate {
  --bg: #11131a;
  --bg-soft: #181c26;
  --bg-panel: #202737;
  --bg-accent: #34506f;
  --bg-accent-2: #205c58;
  --text: #f3f6fb;
  --text-soft: #c0cad9;
  --border: #364258;
  --link: #91d7ff;
  --link-active: #d8f2ff;
  --shadow: rgba(0, 0, 0, 0.43);
  --code-bg: #111925;
}

a {
  color: var(--link);
}

a:hover {
  color: var(--link-active);
}

code {
  font-family: "JetBrains Mono", "Cascadia Code", "Fira Code", monospace;
  font-size: 0.92em;
}

.page-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 1rem auto 2rem auto;
}

.sar-acquisition-page .page-shell {
  width: min(1320px, calc(100% - 2.5rem));
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem;
  background: linear-gradient(135deg, color-mix(in srgb, var(--bg-panel) 92%, white 8%), var(--bg-soft));
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 20px 40px var(--shadow);
}

.hero-content h1 {
  margin: 0.2rem 0 0.6rem 0;
  line-height: 1.2;
}

.brand-row {
  display: flex;
  align-items: center;
  margin-bottom: 0.6rem;
}

.philab-logo {
  width: min(140px, 30vw);
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 10px 24px var(--shadow);
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-soft);
  font-weight: 600;
  font-size: 0.78rem;
}

.lead {
  margin: 0;
  color: var(--text-soft);
  max-width: 72ch;
}

.theme-picker {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  align-items: flex-start;
  min-width: 160px;
}

.theme-picker label {
  color: var(--text-soft);
  font-size: 0.85rem;
}

.theme-picker select {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
}

.site-nav {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--text-soft);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-size: 0.92rem;
  transition: all 120ms ease;
}

.site-nav a:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--link) 55%, var(--border) 45%);
}

.site-nav a.active {
  background: color-mix(in srgb, var(--bg-soft) 66%, var(--link) 34%);
  color: var(--link-active);
  border-color: color-mix(in srgb, var(--link) 70%, white 30%);
}

main {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.15rem;
  box-shadow: 0 10px 24px var(--shadow);
}

.panel h2 {
  margin-top: 0.1rem;
  margin-bottom: 0.7rem;
}

.panel h3 {
  margin-top: 1.2rem;
  margin-bottom: 0.45rem;
}

.sar-acquisition-page .panel {
  padding: 1.25rem 1.35rem;
}

.panel p,
.panel li {
  color: var(--text-soft);
}

.panel ul,
.panel ol {
  margin-top: 0.35rem;
}

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

.concept {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-soft) 90%, black 10%);
  border-radius: 10px;
  padding: 0.85rem;
}

.concept h3 {
  margin: 0 0 0.35rem 0;
}

.page-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.intro-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.intro-btn {
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-soft) 86%, var(--bg-accent) 14%);
  border-radius: 12px;
  padding: 0.65rem 0.95rem;
  font-weight: 600;
  transition: all 120ms ease;
}

.intro-btn:hover {
  color: var(--link-active);
  border-color: color-mix(in srgb, var(--link) 65%, var(--border) 35%);
  background: color-mix(in srgb, var(--bg-soft) 65%, var(--bg-accent) 35%);
}

.page-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem;
  background: color-mix(in srgb, var(--bg-soft) 88%, black 12%);
  text-decoration: none;
}

.page-card h3 {
  margin: 0 0 0.35rem 0;
  color: var(--text);
}

.page-card p {
  margin: 0;
  color: var(--text-soft);
}

.workflow-diagram {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: minmax(140px, 1fr) 34px minmax(140px, 1fr) 34px minmax(140px, 1fr) 34px minmax(140px, 1fr) 34px minmax(140px, 1fr);
  gap: 0.5rem;
  align-items: stretch;
}

.wf-step {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.72rem 0.76rem;
  background: linear-gradient(140deg, color-mix(in srgb, var(--bg-soft) 86%, white 14%), color-mix(in srgb, var(--bg-soft) 93%, black 7%));
  box-shadow: 0 8px 20px var(--shadow);
}

.wf-step h3 {
  margin: 0;
  font-size: 0.94rem;
  color: var(--text);
}

.wf-step p {
  margin: 0.34rem 0 0 0;
  font-size: 0.86rem;
  line-height: 1.45;
}

.wf-arrow {
  display: grid;
  place-items: center;
  color: var(--link-active);
  font-weight: 700;
  font-size: 1rem;
  opacity: 0.95;
}

.code-block {
  position: relative;
  margin: 0.6rem 0 0.85rem 0;
}

.site-dynamic-meta {
  margin-top: 0.6rem;
  color: var(--text-soft);
  font-size: 0.78rem;
}

.scroll-progress {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: color-mix(in srgb, var(--bg-soft) 70%, transparent 30%);
  z-index: 9999;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--link), var(--link-active));
}

.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-soft) 84%, var(--bg-panel) 16%);
  color: var(--text);
  padding: 0.52rem 0.72rem;
  font-size: 0.85rem;
  z-index: 9999;
  box-shadow: 0 10px 24px var(--shadow);
  cursor: pointer;
}

.back-to-top:hover {
  color: var(--link-active);
  border-color: color-mix(in srgb, var(--link) 60%, var(--border) 40%);
}

.copy-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.25rem 0.55rem;
  font-size: 0.78rem;
  background: color-mix(in srgb, var(--bg-soft) 88%, white 12%);
  color: var(--text);
  cursor: pointer;
}

.copy-btn:hover {
  filter: brightness(1.09);
}

.copy-btn.copied {
  border-color: color-mix(in srgb, var(--link) 55%, white 45%);
  color: var(--link-active);
}

pre {
  margin: 0;
  overflow: auto;
  background: var(--code-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 0.95rem;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

.diagram-figure {
  margin: 0.6rem 0 0 0;
}

.zoom-box {
  margin-top: 0.65rem;
}

.zoom-toolbar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.55rem;
}

.zoom-btn {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-soft) 86%, white 14%);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  min-width: 2rem;
  padding: 0.25rem 0.52rem;
  cursor: pointer;
}

.zoom-btn:hover {
  border-color: color-mix(in srgb, var(--link) 60%, var(--border) 40%);
  color: var(--link-active);
}

.zoom-level {
  margin-left: 0.3rem;
  color: var(--text-soft);
  font-size: 0.84rem;
  min-width: 3.2rem;
}

.zoom-viewport {
  overflow: auto;
  max-height: 560px;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 10px 24px var(--shadow);
  background: color-mix(in srgb, var(--bg-soft) 90%, black 10%);
  cursor: default;
}

.zoom-box.is-zoomed .zoom-viewport {
  cursor: grab;
}

.zoom-viewport.is-dragging {
  cursor: grabbing !important;
}

.diagram-image {
  width: 100%;
  height: auto;
  display: block;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
}

.zoom-image {
  max-width: none;
  transform-origin: top left;
  user-select: none;
  -webkit-user-drag: none;
}

.diagram-figure figcaption {
  margin-top: 0.55rem;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.sar-acquisition-page .table-wrap {
  margin: 0.55rem 0 1rem 0;
}

.sar-acquisition-page table {
  table-layout: fixed;
  min-width: 0;
}

.sar-acquisition-page th,
.sar-acquisition-page td {
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.65rem 0.7rem;
  text-align: left;
}

th {
  background: color-mix(in srgb, var(--bg-soft) 84%, white 16%);
  color: var(--text);
}

td {
  color: var(--text-soft);
}

@media (max-width: 980px) {
  .concept-grid,
  .page-cards {
    grid-template-columns: 1fr;
  }

  .intro-buttons {
    flex-direction: column;
  }

  .workflow-diagram {
    grid-template-columns: 1fr;
  }

  .wf-arrow {
    min-height: 22px;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: calc(100% - 1rem);
  }

  .sar-acquisition-page .page-shell {
    width: calc(100% - 0.8rem);
  }

  .hero {
    flex-direction: column;
  }

  .hero h1 {
    font-size: 1.45rem;
  }

  .zoom-viewport {
    max-height: 360px;
  }
}