/* ---------------------------------------------------------------
   Open Space Robotics — workshop site
   Design concept: a technical blueprint / systems schematic.
   Deep blueprint-blue ground, drafting-paper linework, amber and
   teal call-outs used the way a spec sheet marks status and data.
----------------------------------------------------------------- */

:root {
  --blueprint-base:  #01162b;
  --blueprint-deep:  #12283F;
  --blueprint-well:  #21456B;
  --line:            #EAF1F8;
  --line-dim:        rgba(234, 241, 248, 0.848);
  --line-faint:      rgba(234, 241, 248, 0.18);
  --amber:           #F2A93B;
  --teal:            #86BBC0;
  --pending:         rgba(234, 241, 248, 0.35);

  --font-head: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --max: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--blueprint-base);
  color: var(--line);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}

a { color: var(--amber); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--line);
}

p { margin: 0 0 1em; max-width: 66ch; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--teal);
  margin: 0 0 0.4em;
}

/* Graph-paper ground, fixed behind everything */
/* .gridfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.5;
} */

header, main, footer { position: relative; z-index: 1; }

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--line-faint);
  background: rgba(18, 40, 63, 0.72);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.site-header__mark {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--line);
}
.site-header__mark:hover { text-decoration: none; }

.site-header__hex {
  width: 26px;
  height: 26px;
  color: var(--amber);
  flex: none;
}
.site-header__hex svg { width: 100%; height: 100%; display: block; }

.site-header__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  gap: 24px;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.site-nav a {
  color: var(--line-dim);
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--line); text-decoration: none; }
.site-nav a[aria-current="page"] {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 76px 0 48px;
  border-bottom: 1px solid var(--line-faint);
}

.hero__media {
  position: absolute;
  z-index: -1;
  inset: 0;
  overflow: hidden;
  background: var(--blueprint-deep);
}

.hero__track {
  display: flex;
  width: max-content;
  height: 100%;
  animation: hero-pan 72s linear infinite;
}

.hero__frame {
  flex: 0 0 max(440px, 50vw);
  height: 100%;
  position: relative;
}

.hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(1, 22, 43, 0.235);
}

.hero__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__content {
  padding: 32px;
  background: rgba(1, 22, 43, 0.9);
  border: 1px solid rgba(234, 241, 248, 0.28);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

@keyframes hero-pan {
  to { transform: translateX(-50%); }
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--teal);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
  max-width: 20ch;
}

.hero__lede {
  font-size: 1.15rem;
  color: var(--line-dim);
  max-width: 58ch;
}

/* Spec strip: label/value pairs like a data sheet */
.spec-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 36px;
  border: 1px solid var(--line-faint);
}

.spec-strip__item {
  flex: 1 1 200px;
  padding: 14px 20px;
  border-right: 1px solid var(--line-faint);
}
.spec-strip__item:last-child { border-right: none; }

.spec-strip__item dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--teal);
  margin: 0 0 4px;
}
.spec-strip__item dd {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--line);
  margin: 0;
}

/* ---------- Generic section ---------- */

section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line-faint);
}
section:last-of-type { border-bottom: none; }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.section-head h2 { font-size: 1.7rem; margin: 0; }
.section-head .mono-label { margin: 0; }

.outcomes-intro {
  max-width: 62ch;
  color: var(--line-dim);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.outcome-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-faint);
}

.outcome-list li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-faint);
  color: var(--line);
}

.outcome-list__index {
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 0.78rem;
  padding-top: 3px;
}

/* Two-column goal layout */
.goal {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr;
  gap: 48px;
  align-items: start;
}

.goal__statement {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--line);
  border-left: 2px solid var(--amber);
  padding-left: 20px;
}

.goal__body p { color: var(--line-dim); }

/* Topic grid */
.topics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
}

.topic-card {
  background: var(--blueprint-base);
  padding: 20px;
  position: relative;
}

.topic-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--blueprint-deep);
  background: var(--teal);
  padding: 2px 7px;
  margin-bottom: 10px;
}

.topic-card p { margin: 0; color: var(--line-dim); font-size: 0.95rem; }

/* Format list */
.format-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.format-list li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-faint);
}
.format-list li:last-child { border-bottom: none; padding-bottom: 0; }
.format-list .fmt-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--amber);
  padding-top: 3px;
}
.format-list p { margin: 0; color: var(--line-dim); }

/* Resource / participate strip */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.info-card {
  border: 1px solid var(--line-faint);
  padding: 20px;
}
.info-card h3 { font-size: 1rem; margin-bottom: 8px; }
.info-card p { color: var(--line-dim); font-size: 0.95rem; margin: 0; }

/* ---------- People cards (speakers / organizers) ---------- */

.people-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.organizers-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.organizers-grid .person-card__avatar {
  width: 95px;
  height: 95px;
}

@media (min-width: 761px) {
  .organizers-grid > :last-child:nth-child(3n + 1) { grid-column: 2; }
}

.person-card {
  position: relative;
  border: 1px solid var(--line-faint);
  padding: 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.person-card::before,
.person-card::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-color: var(--amber);
  border-style: solid;
}
.person-card::before {
  top: -1px; left: -1px;
  border-width: 1px 0 0 1px;
}
.person-card::after {
  bottom: -1px; right: -1px;
  border-width: 0 1px 1px 0;
}

.person-card--pending::before,
.person-card--pending::after {
  border-color: var(--pending);
}

.person-card__avatar {
  width: 56px;
  height: 56px;
  flex: none;
  overflow: hidden;
  border-radius: 50%;
}
.person-card__avatar svg,
.person-card__avatar img { width: 100%; height: 100%; display: block; object-fit: cover; }

.person-card__name {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.02rem;
  margin: 0 0 2px;
}

.person-card__role {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber);
  letter-spacing: 0.03em;
  margin: 0 0 6px;
}

.person-card__meta {
  font-size: 0.9rem;
  color: var(--line-dim);
  margin: 0 0 4px;
}

.person-card__meta a { color: var(--teal); }

.pending-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
  color: var(--pending);
  border: 1px solid var(--pending);
  padding: 1px 6px;
  margin-top: 4px;
}

/* ---------- Schedule ---------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line-faint);
}

.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 20px;
  padding: 16px 0 16px 28px;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 22px;
  width: 9px;
  height: 9px;
  background: var(--blueprint-base);
  border: 2px solid var(--amber);
}

.timeline li + li { border-top: 1px dashed var(--line-faint); }

.timeline time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--teal);
  white-space: nowrap;
}

.timeline .activity { color: var(--line); font-weight: 500; }
.timeline .activity-note { display: block; color: var(--line-dim); font-weight: 400; font-size: 0.9rem; margin-top: 2px; }

.schedule-note {
  border: 1px dashed var(--line-faint);
  padding: 16px 20px;
  color: var(--line-dim);
  font-size: 0.92rem;
  margin-bottom: 32px;
}

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

.site-footer {
  background: var(--blueprint-deep);
  border-top: 1px solid var(--line-faint);
  padding: 36px 0;
}
.site-footer__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.site-footer p { margin: 0; font-size: 0.92rem; }

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .hero__content { padding: 24px; }
  .hero__frame { flex-basis: 85vw; }
  .goal { grid-template-columns: 1fr; }
  .people-grid { grid-template-columns: 1fr; }
  .organizers-grid { grid-template-columns: 1fr; }
  .topics { grid-template-columns: 1fr 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .spec-strip__item { border-right: none; border-bottom: 1px solid var(--line-faint); }
  .site-footer__inner { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 100px 1fr; }
}

@media (max-width: 520px) {
  .topics { grid-template-columns: 1fr; }
  .site-nav { gap: 16px; font-size: 0.78rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .hero__track { animation: none; }
}