/* ==========================================================================
   Shared styling for adrigabzu/presentations
   Design tokens mirror adrianzucco.com (Hugo + Blowfish, "adrian" scheme):
   Stone neutrals, Orange primary, Rose secondary, Raleway type.
   ========================================================================== */

/* ---------- Tokens ---------- */

:root {
  /* Stone neutrals */
  --n-50: 250, 250, 249;
  --n-100: 245, 245, 244;
  --n-200: 231, 229, 228;
  --n-300: 214, 211, 209;
  --n-400: 168, 162, 158;
  --n-500: 120, 113, 108;
  --n-600: 87, 83, 78;
  --n-700: 68, 64, 60;
  --n-800: 10, 10, 10;
  --n-900: 28, 25, 23;

  /* Orange primary */
  --p-100: 255, 237, 213;
  --p-200: 254, 215, 170;
  --p-400: 251, 146, 60;
  --p-500: 249, 115, 22;
  --p-600: 234, 88, 12;
  --p-700: 194, 65, 12;

  /* Rose secondary */
  --s-400: 251, 113, 133;
  --s-600: 225, 29, 72;

  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 54rem;
  --font-sans: "Raleway", ui-sans-serif, system-ui, -apple-system,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  /* Light appearance (default) */
  color-scheme: light;
  --bg: rgb(255, 255, 255);
  --surface: rgb(var(--n-50));
  --surface-2: rgb(var(--n-100));
  --text: rgb(var(--n-900));
  --text-muted: rgb(var(--n-500));
  --border: rgb(var(--n-200));
  --border-strong: rgb(var(--n-300));
  --link: rgb(var(--p-600));
  --link-hover: rgb(var(--p-700));
  --accent: rgb(var(--p-600));
  --accent-soft: rgb(var(--p-100));
  --accent-line: rgba(var(--p-500), 0.35);
  --secondary: rgb(var(--s-600));
  --shadow: 0 1px 2px rgba(28, 25, 23, 0.05), 0 8px 24px rgba(28, 25, 23, 0.06);
  --net-ink: 0, 0, 0;
  --net-dot: 0.2;
  --net-line: 0.13;
}

html.dark {
  color-scheme: dark;
  --bg: rgb(var(--n-800));
  --surface: rgb(var(--n-900));
  --surface-2: rgb(38, 35, 33);
  --text: rgb(255, 255, 255);
  --text-muted: rgb(var(--n-400));
  --border: rgb(var(--n-700));
  --border-strong: rgb(var(--n-600));
  --link: rgb(var(--p-400));
  --link-hover: rgb(var(--p-200));
  --accent: rgb(var(--p-400));
  --accent-soft: rgba(var(--p-500), 0.16);
  --accent-line: rgba(var(--p-400), 0.4);
  --secondary: rgb(var(--s-400));
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 28px rgba(0, 0, 0, 0.35);
  --net-ink: 255, 255, 255;
  --net-dot: 0.3;
  --net-line: 0.22;
}

/* ---------- Base ---------- */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#particles {
  position: fixed;
  inset: 0;
  z-index: -10;
  pointer-events: none;
  filter: blur(2px);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  line-height: 1.25;
  text-wrap: balance;
}

a {
  color: var(--link);
  text-decoration: none;
  text-underline-offset: 0.2em;
  transition: color 0.15s ease;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--surface-2);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* ---------- Layout ---------- */

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem 5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}

.site-header .bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
}

.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.brand .brand-sub {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a {
  color: var(--text-muted);
}

.site-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.theme-toggle {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  border-radius: 999px;
  width: 2.15rem;
  height: 2.15rem;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.theme-toggle svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

html:not(.dark) .theme-toggle .icon-sun,
html.dark .theme-toggle .icon-moon {
  display: none;
}

/* Floating appearance switcher, for pages without a site header */

.theme-float {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 60;
}

.theme-float .theme-toggle {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
}

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

.page-header {
  padding: 3.5rem 0 2rem;
}

.kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent);
  margin-bottom: 0.85rem;
}

.page-header h1 {
  font-size: clamp(2rem, 5vw, 2.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

.page-header .lede {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0;
  max-width: 46rem;
}

.meta {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-top: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.meta-row span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.meta-row .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

/* ---------- Sections ---------- */

.section {
  margin-top: 3rem;
}

.section > h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
}

.section h4 {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 1.5rem 0 0.6rem;
}

p {
  margin: 0 0 1rem;
}

/* ---------- Cards ---------- */

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  margin-bottom: 1rem;
  transition: border-color 0.15s ease, transform 0.15s ease,
    box-shadow 0.15s ease;
}

a.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.card h3 {
  margin: 0 0 0.3rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

a.card:hover h3 {
  color: var(--accent);
}

.card .meta {
  font-size: 0.92rem;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  margin-top: 0.75rem;
}

/* ---------- Lists ---------- */

.section ul,
.section ol {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.section li {
  margin-bottom: 0.4rem;
}

.section li::marker {
  color: var(--accent);
}

ul.plain {
  list-style: none;
  padding-left: 0;
}

ul.plain > li {
  padding-left: 1.15rem;
  position: relative;
}

ul.plain > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

ul.signs {
  list-style: none;
  padding-left: 0;
  margin: 0.75rem 0 0;
}

ul.signs > li {
  display: grid;
  grid-template-columns: 1.55rem 1fr;
  gap: 0.65rem;
  align-items: start;
  margin-bottom: 0.6rem;
}

/* People / organisers */

.people {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.people li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  margin: 0;
}

.people .name {
  font-weight: 700;
  display: block;
}

.people .affil {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Reference list */

.refs {
  list-style: none;
  padding: 0;
  margin: 0 0 0.5rem;
}

.refs li {
  padding: 0.55rem 0 0.55rem 1.15rem;
  border-left: 2px solid var(--border);
  margin-bottom: 0.35rem;
  font-size: 0.98rem;
  transition: border-color 0.15s ease;
}

.refs li:hover {
  border-left-color: var(--accent);
}

.refs .src {
  font-style: italic;
  color: var(--text-muted);
}

.refs a.doi {
  font-size: 0.88rem;
  word-break: break-word;
}

/* ---------- Steps (guide) ---------- */

.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0;
}

.steps > li {
  counter-increment: step;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem 1.25rem 3.9rem;
  margin: 0 0 1rem;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 1.15rem;
  top: 1.15rem;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 800;
  font-size: 0.95rem;
}

.steps h3 {
  margin: 0 0 0.5rem;
  font-size: 1.12rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
}

.time {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--secondary);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.05rem 0.55rem;
  white-space: nowrap;
}

.steps p:last-child,
.steps ul:last-child,
.steps ol:last-child {
  margin-bottom: 0;
}

/* Sign markers used in the arrow rules */

.sign {
  display: grid;
  place-items: center;
  width: 1.55rem;
  height: 1.55rem;
  margin-top: 0.1rem;
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.9rem;
  line-height: 1;
  background: var(--accent-soft);
  color: var(--accent);
}

.sign.minus {
  background: color-mix(in srgb, var(--secondary) 16%, transparent);
  color: var(--secondary);
}

.sign.query {
  background: var(--surface-2);
  color: var(--text-muted);
}

/* ---------- Callout ---------- */

.callout {
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout .callout-title {
  font-weight: 700;
  display: block;
  margin-bottom: 0.25rem;
}

/* ---------- Table ---------- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.98rem;
}

thead th {
  text-align: left;
  background: var(--surface);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
}

tbody td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody td:first-child {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
  width: 1%;
}

/* ---------- QR ---------- */

.qr {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}

.qr img {
  width: 140px;
  height: 140px;
  flex: none;
  border-radius: var(--radius-sm);
}

.qr .qr-text {
  min-width: 14rem;
  flex: 1;
}

/* ---------- Footer ---------- */

.page-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
}

.page-footer .spacer {
  margin-left: auto;
}

.backlink {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

/* ---------- Motion & print ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media print {
  #particles,
  .site-header,
  .theme-float,
  .theme-toggle,
  .qr {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }
  .wrap {
    max-width: none;
    padding: 0;
  }
  .steps > li,
  .card,
  .callout,
  .people li {
    break-inside: avoid;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}