/* ==========================================================================
   Building for SF — design tokens
   Direction: civic blueprint / permit-plate. SF's built environment,
   drafted in dimension lines, stamped like a permit.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Inter:wght@400;500;600&display=swap');

:root {
  --ink:            #14201F;
  --blueprint:      #1E3A5F;
  --blueprint-mid:  #2F5C82;
  --blueprint-light:#7FA8C9;
  --paper:          #EDE7D8;
  --paper-dim:      #E1D9C4;
  --rust:           #B8451F;
  --rust-dark:      #8F350F;
  --moss:           #5C7A5C;

  --display: 'Space Grotesk', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --body: 'Inter', sans-serif;

  --max: 1120px;
  --edge: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

a { color: inherit; }

img { max-width: 100%; display: block; }

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

/* Blueprint grid background, used on dark sections */
.blueprint-bg {
  background-color: var(--blueprint);
  background-image:
    linear-gradient(rgba(127,168,201,0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127,168,201,0.14) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--paper);
}

/* Dimension-line rule, used as section dividers/labels */
.dim-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blueprint-mid);
}
.dim-line::before,
.dim-line::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
}
.dim-line.on-dark { color: var(--blueprint-light); }

/* ---------- Nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid rgba(20,32,31,0.12);
}
.site-nav .wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.wordmark-logo {
  height: 30px;
  width: 30px;
  display: block;
}
.wordmark span {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--rust);
  letter-spacing: 0.1em;
  border: 1px solid var(--rust);
  padding: 2px 5px;
  border-radius: 2px;
  transform: translateY(-1px);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}
.nav-links a {
  text-decoration: none;
  color: var(--ink);
  opacity: 0.7;
  transition: opacity 0.15s ease;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}
.nav-links a:hover { opacity: 1; }
@media (max-width: 980px) {
  .nav-links { gap: 18px; font-size: 0.74rem; }
}
.nav-links a.current { opacity: 1; border-bottom-color: var(--rust); }
.nav-cta {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-decoration: none;
  color: var(--paper);
  background: var(--rust);
  padding: 9px 16px;
  border-radius: 3px;
  letter-spacing: 0.03em;
  transition: background 0.15s ease;
}
.nav-cta:hover { background: var(--rust-dark); }
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid rgba(20,32,31,0.12);
    box-shadow: 0 12px 24px rgba(20,32,31,0.08);
    padding: 0 var(--edge) 10px;
    font-size: 0.85rem;
  }
  .nav-links.open li { border-top: 1px solid rgba(20,32,31,0.08); }
  .nav-links.open a {
    display: block;
    padding: 14px 0;
    opacity: 0.85;
    border-bottom: none;
  }
  .nav-links.open a.current { opacity: 1; color: var(--rust); }
  .nav-toggle {
    display: block;
    margin-left: auto;
    margin-right: 12px;
    background: none;
    color: var(--ink);
    border: 1px solid var(--ink);
    border-radius: 3px;
    padding: 7px 10px;
    font-family: var(--mono);
    font-size: 0.75rem;
    cursor: pointer;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 13px 22px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--rust);
  color: var(--paper);
}
.btn-primary:hover { background: var(--rust-dark); }
.btn-ghost {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}
.btn-ghost:hover { transform: translateX(2px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 64px;
}
.hero .wrap {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; }
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rust);
  margin: 0 0 18px;
}
.hero h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.4rem, 5.4vw, 4.1rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}
.hero h1 em {
  font-style: normal;
  color: var(--rust);
}
.hero p.lede {
  font-size: 1.1rem;
  max-width: 46ch;
  color: rgba(20,32,31,0.78);
  margin: 0 0 32px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-dates {
  margin-top: 36px;
  display: flex;
  gap: 28px;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: rgba(20,32,31,0.7);
}
.hero-dates strong {
  display: block;
  font-family: var(--display);
  font-size: 1.05rem;
  color: var(--ink);
  font-weight: 600;
}

/* Elevation drawing (SVG) */
.elevation { width: 100%; height: auto; }
.elevation .line { fill: none; stroke: var(--blueprint); stroke-width: 1.4; }
.elevation .line-light { stroke: var(--blueprint-light); }
.elevation .dim { stroke: var(--rust); stroke-width: 1; }
.elevation .dim-text { font-family: var(--mono); font-size: 8px; fill: var(--rust); }
.elevation .fill-paper { fill: var(--paper); }
.elevation .fill-blue { fill: var(--blueprint); opacity: 0.06; }

/* ---------- Stat / dimension row ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(20,32,31,0.15);
  border-bottom: 1px solid rgba(20,32,31,0.15);
}
@media (max-width: 720px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}
.stat {
  padding: 26px var(--edge);
  border-right: 1px solid rgba(20,32,31,0.15);
}
.stat:last-child { border-right: none; }
.stat .num {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--blueprint);
}
.stat .label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(20,32,31,0.6);
  margin-top: 4px;
}

/* ---------- Section shell ---------- */
.section { padding: 84px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 14px 0 12px;
}
.section-head p {
  color: rgba(20,32,31,0.72);
  font-size: 1.02rem;
  margin: 0;
}
.section-head p + p { margin-top: 14px; }
.blueprint-bg .section-head p { color: rgba(237,231,216,0.78); }
.blueprint-bg .section-head h2 { color: var(--paper); }

/* ---------- About / cards ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(20,32,31,0.15);
  border: 1px solid rgba(20,32,31,0.15);
}
@media (max-width: 780px) {
  .about-grid { grid-template-columns: 1fr; }
}
.about-card {
  background: var(--paper);
  padding: 30px 26px;
}
.about-card .tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--rust);
  letter-spacing: 0.08em;
}
.about-card h3 {
  font-family: var(--display);
  font-size: 1.15rem;
  margin: 10px 0 10px;
}
.about-card p {
  margin: 0;
  color: rgba(20,32,31,0.75);
  font-size: 0.96rem;
}

/* ---------- Speakers ---------- */
.speaker-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
  gap: 18px;
}
.speaker-card {
  border: 1px solid rgba(237,231,216,0.25);
  padding: 22px;
  border-radius: 4px;
}
.speaker-card .org {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blueprint-light);
}
.speaker-card .name {
  font-family: var(--display);
  font-size: 1.08rem;
  font-weight: 600;
  margin-top: 8px;
}

/* ---------- Schedule preview / timeline ---------- */
.timeline {
  border-left: 2px solid var(--blueprint);
  margin-left: 6px;
}
.day-block { margin-bottom: 8px; }
.day-label {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--rust);
  padding: 4px 0 4px 26px;
  position: relative;
}
.day-label::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: var(--rust);
  border-radius: 50%;
  border: 3px solid var(--paper);
}
.tl-item {
  padding: 14px 0 14px 26px;
  border-bottom: 1px dashed rgba(20,32,31,0.15);
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
}
@media (max-width: 640px) {
  .tl-item { grid-template-columns: 1fr; gap: 4px; }
}
.tl-item:last-child { border-bottom: none; }
.tl-time {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--blueprint-mid);
  white-space: nowrap;
}
.tl-title { font-weight: 600; }
.tl-desc { color: rgba(20,32,31,0.7); font-size: 0.92rem; margin-top: 3px; }

/* ---------- Permit plate (results cards) ---------- */
.plate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: 28px;
}
.plate {
  position: relative;
  background: #fff;
  border: 1px solid rgba(20,32,31,0.15);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 4px 4px 0 rgba(30,58,95,0.08);
}
.plate-photo {
  aspect-ratio: 4/3;
  background: var(--blueprint);
  background-image:
    linear-gradient(rgba(127,168,201,0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127,168,201,0.18) 1px, transparent 1px);
  background-size: 20px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.plate-photo img { width: 100%; height: 100%; object-fit: cover; }
.plate-photo .ph-icon { color: var(--blueprint-light); opacity: 0.5; }
.plate-body { padding: 22px; }
.plate-team {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rust);
}
.plate-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  margin: 8px 0 8px;
}
.plate-desc { font-size: 0.92rem; color: rgba(20,32,31,0.75); margin: 0 0 14px; }
.plate-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--blueprint-mid);
}
.plate-meta span {
  border: 1px solid rgba(47,92,130,0.3);
  padding: 3px 8px;
  border-radius: 20px;
}
.stamp {
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--rust);
  border: 2px solid var(--rust);
  border-radius: 50%;
  width: 62px;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transform: rotate(-12deg);
  background: rgba(255,255,255,0.9);
  line-height: 1.1;
}

/* ---------- Empty state ---------- */
.empty-state {
  border: 1px dashed rgba(20,32,31,0.3);
  border-radius: 6px;
  padding: 64px 32px;
  text-align: center;
}
.empty-state .mono-tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rust);
}
.empty-state h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  margin: 12px 0 10px;
}
.empty-state p {
  color: rgba(20,32,31,0.68);
  max-width: 46ch;
  margin: 0 auto;
}

/* ---------- Logo grid (partners / sponsors) ---------- */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 300px));
  justify-content: center;
  gap: 20px;
}
.logo-card {
  background: var(--paper);
  border: 1px solid rgba(20,32,31,0.12);
  border-radius: 6px;
  padding: 26px 24px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.logo-card .logo-frame {
  width: 100%;
  height: 104px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo-card img {
  max-height: 104px;
  max-width: 100%;
  width: auto;
  object-fit: contain;
}
.logo-card .logo-name {
  width: 100%;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(20,32,31,0.12);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(20,32,31,0.62);
}
.logo-note {
  margin: 28px auto 0;
  max-width: 52ch;
  text-align: center;
  font-size: 0.92rem;
  color: rgba(20,32,31,0.68);
}
.blueprint-bg .logo-note { color: rgba(237,231,216,0.72); }

/* ---------- CTA band ---------- */
.cta-band {
  padding: 72px 0;
  text-align: center;
}
.cta-band h2 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  margin: 0 0 14px;
}
.cta-band p {
  color: rgba(237,231,216,0.8);
  max-width: 50ch;
  margin: 0 auto 30px;
}
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
/* Button sitting directly under the CTA headline, with copy still to follow */
.cta-band h2 + .cta-actions { margin: 24px 0 30px; }

/* ---------- Footer ---------- */
footer.site-footer {
  padding: 40px 0;
  border-top: 1px solid rgba(20,32,31,0.15);
}
footer.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: rgba(20,32,31,0.6);
}

/* ---------- Page header (schedule/results) ---------- */
.page-header {
  padding: 56px 0 40px;
  border-bottom: 1px solid rgba(20,32,31,0.15);
}
.page-header .hero-eyebrow { margin-bottom: 12px; }
.page-header h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}
.page-header p {
  max-width: 56ch;
  color: rgba(20,32,31,0.72);
  font-size: 1.02rem;
  margin: 0;
}

/* Sponsorship note in the CTA band */
.cta-band .sponsor-note {
  margin: 28px auto 0;
  max-width: 46ch;
  font-size: 0.92rem;
  color: rgba(237,231,216,0.72);
  border-top: 1px solid rgba(127,168,201,0.35);
  padding-top: 20px;
}

/* Empty state on the dark blueprint sections (partners/sponsors) */
.blueprint-bg .empty-state {
  border-color: rgba(127,168,201,0.45);
}
.blueprint-bg .empty-state p {
  color: rgba(237,231,216,0.72);
}