/* ============================================================
   Cool Climate Collective — site styles
   Palette: glacial ink / mineral paper / sea teal / thermal signal
   Type:   Fraunces (display) · Hanken Grotesk (body) · Space Mono (data)
   ------------------------------------------------------------
   To swap the typeface family, change ONLY the @import line below
   and the three --font-* variables. Nothing else references fonts.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;1,9..144,400;1,9..144,500&family=Hanken+Grotesk:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

:root {
  --ink: #0d1f24;
  --ink-soft: #2c4149;
  --paper: #eef3f2;
  --paper-raised: #f7faf9;
  --glacier: #d3e2e0;
  --sea: #145c55;
  --sea-deep: #0d423d;
  --signal: #e4572e;
  --cold: #6fb3c9;
  --rule: rgba(13, 31, 36, 0.14);
  --max: 1120px;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Hanken Grotesk", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Space Mono", ui-monospace, "SF Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--sea); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--sea-deep); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

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

/* --- Thermocline: the site's signature rule (cold → heat) --- */
.thermocline {
  height: 3px;
  border: 0;
  background: linear-gradient(90deg, var(--cold) 0%, var(--sea) 45%, var(--signal) 100%);
}

/* ---------------- Header / nav ---------------- */
.site-header {
  background: var(--ink);
  color: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto;
}

.wordmark {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
}
.wordmark strong { color: var(--cold); font-weight: 600; }

.nav-toggle { display: none; }
.nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  border: 1px solid rgba(238, 243, 242, 0.35);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--paper);
}

.site-nav { display: flex; align-items: center; gap: 1.4rem; }
.site-nav a {
  color: rgba(238, 243, 242, 0.82);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: #fff; }
.site-nav a[aria-current="page"] {
  color: #fff;
  border-image: linear-gradient(90deg, var(--cold), var(--signal)) 1;
  border-bottom: 2px solid;
}
.site-nav .cta {
  background: var(--sea);
  color: #fff;
  padding: 0.45rem 0.95rem;
  border-radius: 4px;
  border-bottom: none;
}
.site-nav .cta:hover { background: var(--sea-deep); }

/* ---------------- Hero ---------------- */
.hero { padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4.5rem); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sea);
  display: block;
  margin-bottom: 1.1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(2.1rem, 5.4vw, 3.7rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 21ch;
}
.hero h1 em { font-style: italic; color: var(--sea); }

.hero .lede {
  margin-top: 1.4rem;
  max-width: 58ch;
  font-size: clamp(1.05rem, 1.9vw, 1.2rem);
  color: var(--ink-soft);
}

.hero-actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.8rem; }

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.7rem 1.3rem;
  border-radius: 4px;
  border: 1.5px solid var(--sea);
}
.btn-solid { background: var(--sea); color: #fff; }
.btn-solid:hover { background: var(--sea-deep); border-color: var(--sea-deep); color: #fff; }
.btn-ghost { color: var(--sea); background: transparent; }
.btn-ghost:hover { background: var(--glacier); color: var(--sea-deep); }

/* ---------------- Sections ---------------- */
.section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.section.tinted { background: var(--glacier); }
.section.dark { background: var(--ink); color: var(--paper); }
.section.dark .eyebrow { color: var(--cold); }
.section.dark a { color: var(--cold); }

.section-head { margin-bottom: 2rem; max-width: 60ch; }
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.15;
}
.section-head p { margin-top: 0.8rem; color: var(--ink-soft); }
.section.dark .section-head p { color: rgba(238, 243, 242, 0.75); }

/* ---------------- Doctrine ledger (interactive thesis) ---------------- */
.doctrine-list { border-top: 1px solid var(--rule); }

.doctrine {
  border-bottom: 1px solid var(--rule);
}

.doctrine summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 3.2rem 1fr auto;
  align-items: baseline;
  gap: 1rem;
  padding: 1.3rem 0.25rem;
}
.doctrine summary::-webkit-details-marker { display: none; }

.doctrine .num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--sea);
}

.doctrine .name {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 500;
  line-height: 1.2;
}

.doctrine .aphorism {
  display: block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin-top: 0.3rem;
}

.doctrine .marker {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--sea);
  transition: transform 0.2s ease;
}
.doctrine[open] .marker { transform: rotate(45deg); color: var(--signal); }

.doctrine-body {
  padding: 0 0.25rem 1.7rem calc(3.2rem + 1rem);
  max-width: 68ch;
}
.doctrine-body p { margin-bottom: 0.9rem; color: var(--ink-soft); }
.doctrine-body p strong { color: var(--ink); }

.doctrine-body .applied {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sea);
  margin: 1.1rem 0 0.4rem;
}

.doctrine[open] summary .name {
  border-image: linear-gradient(90deg, var(--cold), var(--signal)) 1;
  border-bottom: 2px solid;
  padding-bottom: 2px;
}

/* ---------------- Cards ---------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1.3rem 1.3rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  position: relative;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(90deg, var(--cold), var(--sea));
  opacity: 0;
  transition: opacity 0.15s ease;
}
.card:hover::before { opacity: 1; }

.card h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; line-height: 1.25; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { color: var(--sea-deep); text-decoration: underline; }
.card p { font-size: 0.93rem; color: var(--ink-soft); flex: 1; }

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sea);
  background: var(--glacier);
  border-radius: 3px;
  padding: 0.18rem 0.5rem;
  align-self: flex-start;
}
.tag.warm { color: var(--signal); background: rgba(228, 87, 46, 0.1); }

/* ---------------- Portfolio filters ---------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.8rem;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.95rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper-raised);
  color: var(--ink-soft);
  cursor: pointer;
}
.filter-btn:hover { border-color: var(--sea); color: var(--sea); }
.filter-btn[aria-pressed="true"] {
  background: var(--sea);
  border-color: var(--sea);
  color: #fff;
}
.card.hidden { display: none; }

.count-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

/* ---------------- Ecosystem map ---------------- */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.eco-node {
  border: 1px solid var(--rule);
  border-left: 4px solid var(--sea);
  border-radius: 4px;
  background: var(--paper-raised);
  padding: 1.4rem 1.4rem 1.2rem;
}
.eco-node.anchor { border-left-color: var(--signal); }
.eco-node h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; margin-bottom: 0.15rem; }
.eco-node .role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sea);
  display: block;
  margin-bottom: 0.6rem;
}
.eco-node p { font-size: 0.94rem; color: var(--ink-soft); }
.eco-node p + p { margin-top: 0.6rem; }

/* ---------------- Research ---------------- */
.research-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.4rem 0.25rem;
  border-bottom: 1px solid var(--rule);
}
.research-item:first-of-type { border-top: 1px solid var(--rule); }
.research-item h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; line-height: 1.25; }
.research-item p { font-size: 0.94rem; color: var(--ink-soft); margin-top: 0.35rem; max-width: 62ch; }
.research-links { display: flex; gap: 0.9rem; font-family: var(--font-mono); font-size: 0.82rem; white-space: nowrap; }

/* ---------------- News list ---------------- */
.news-list { list-style: none; }
.news-list li {
  padding: 0.9rem 0.25rem;
  border-bottom: 1px solid var(--rule);
  font-size: 0.98rem;
}
.news-list li:first-child { border-top: 1px solid var(--rule); }
.news-list .src {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal);
  margin-right: 0.7rem;
}

/* ---------------- Engage list ---------------- */
.engage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  counter-reset: engage;
}
.engage-item {
  border: 1px solid rgba(238, 243, 242, 0.18);
  border-radius: 6px;
  padding: 1.3rem;
}
.engage-item h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.engage-item h3 a { color: var(--paper); text-decoration: none; }
.engage-item h3 a:hover { color: var(--cold); text-decoration: underline; }
.engage-item p { font-size: 0.9rem; color: rgba(238, 243, 242, 0.72); }

/* ---------------- People ---------------- */
.person { display: grid; grid-template-columns: 1fr; gap: 0.4rem; max-width: 66ch; margin-bottom: 2.2rem; }
.person h3 { font-family: var(--font-display); font-size: 1.4rem; font-weight: 600; }
.person .role { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sea); }
.person p { color: var(--ink-soft); }

/* ---------------- Stats strip ---------------- */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.stat b {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1.1;
}
.stat span { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.section.dark .stat span { color: rgba(238, 243, 242, 0.65); }

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--ink);
  color: rgba(238, 243, 242, 0.8);
  padding: 2.5rem 0 2rem;
  font-size: 0.92rem;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.site-footer a { color: var(--cold); }
.site-footer .fine {
  grid-column: 1 / -1;
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(238, 243, 242, 0.15);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(238, 243, 242, 0.55);
}
.footer-links { list-style: none; display: grid; gap: 0.35rem; }

/* ---------------- Prose ---------------- */
.prose { max-width: 68ch; }
.prose p + p { margin-top: 1rem; }
.prose h3 { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; margin: 1.8rem 0 0.6rem; }
.prose ul { margin: 1rem 0 1rem 1.2rem; }
.prose li + li { margin-top: 0.5rem; }

blockquote.pull {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  font-style: italic;
  line-height: 1.35;
  color: var(--sea-deep);
  border-left: 3px solid var(--signal);
  padding-left: 1.2rem;
  margin: 2rem 0;
  max-width: 30ch;
}

/* ---------------- Mobile ---------------- */
@media (max-width: 820px) {
  .nav-toggle-label { display: inline-block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--ink);
    border-top: 1px solid rgba(238, 243, 242, 0.12);
    padding: 0.5rem 1.25rem 1rem;
  }
  .site-nav a { padding: 0.75rem 0; border-bottom: 1px solid rgba(238, 243, 242, 0.08); }
  .site-nav a[aria-current="page"] { border-bottom: 1px solid rgba(238, 243, 242, 0.08); border-image: none; color: var(--cold); }
  .site-nav .cta { margin-top: 0.8rem; text-align: center; }
  .nav-toggle:checked ~ .site-nav { display: flex; }

  .doctrine summary { grid-template-columns: 2.2rem 1fr auto; }
  .doctrine-body { padding-left: 0.25rem; }
  .research-item { grid-template-columns: 1fr; }
  .site-footer .wrap { grid-template-columns: 1fr; }
}

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