/* ISOSCELES — Site-specific components */

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 4vw, var(--space-10));
}
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}

.section-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.section-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--color-primary);
}

/* --- Typography utilities --- */
.h-hero {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 300;
  line-height: 0.98;
  letter-spacing: -0.035em;
}
.h-hero em {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 400;
}
.h-display { font-size: var(--text-3xl); font-weight: 300; line-height: 1.02; letter-spacing: -0.03em; }
.h-page { font-size: var(--text-2xl); font-weight: 300; line-height: 1.05; letter-spacing: -0.025em; }
.h-section { font-size: var(--text-xl); font-weight: 400; line-height: 1.1; letter-spacing: -0.02em; }
.h-sub { font-size: var(--text-lg); font-weight: 500; font-family: var(--font-body); letter-spacing: -0.005em; }

.lede {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-text-muted);
  max-width: 56ch;
  font-weight: 400;
}

.muted { color: var(--color-text-muted); }
.faint { color: var(--color-text-faint); }
.mono { font-family: var(--font-mono); font-size: 0.9em; letter-spacing: -0.01em; }

/* --- Site header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid color-mix(in oklab, var(--color-border) 50%, transparent);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  padding-block: var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand__mark { width: 32px; height: 32px; color: var(--color-primary); }
.brand__logo {
  display: block;
  height: 38px;
  width: auto;
  max-width: 220px;
}
[data-theme="dark"] .brand__logo,
.site-footer__brand .brand__logo {
  filter: brightness(0) invert(1);
}
.brand__name {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text);
}
.brand__name span { color: var(--color-text-muted); font-weight: 400; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
  padding-block: var(--space-2);
}
.nav a:hover, .nav a[aria-current="page"] {
  color: var(--color-text);
  text-decoration: none;
}
.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--color-primary);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid transparent;
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (max-width: 880px) {
  .nav {
    position: fixed;
    inset: 64px 0 0 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-8) var(--space-6);
    gap: var(--space-4);
    transform: translateX(100%);
    transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1);
    border-top: 1px solid var(--color-border);
  }
  .nav[data-open="true"] { transform: translateX(0); }
  .nav a { font-size: var(--text-lg); }
  .menu-toggle { display: inline-flex; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-text);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
.btn--ghost {
  border-color: var(--color-border);
  color: var(--color-text);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--color-text);
  background: var(--color-surface);
  text-decoration: none;
}
.btn--accent {
  background: var(--color-primary);
  color: #fff;
}
.btn--accent:hover {
  background: var(--color-primary-hover);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
.btn .arrow { transition: transform var(--transition-interactive); }
.btn:hover .arrow { transform: translateX(3px); }

/* --- Hero --- */
.hero {
  position: relative;
  padding-top: clamp(var(--space-12), 8vw, var(--space-24));
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-32));
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: center;
}
.hero__chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface);
  margin-bottom: var(--space-8);
}
.hero__chip .dot {
  width: 6px; height: 6px; border-radius: var(--radius-full);
  background: var(--color-primary);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--color-primary) 25%, transparent);
}
.hero__lede {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.5;
}
.hero__cta {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.hero__visual {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: var(--color-surface-offset);
  box-shadow: var(--shadow-lg);
}
.hero__visual img { width: 100%; height: 100%; object-fit: cover; }
.hero__visual::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(160deg, transparent 50%, color-mix(in oklab, var(--color-text) 15%, transparent));
}

@media (max-width: 880px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { aspect-ratio: 4/3; max-height: 60vh; }
}

/* --- Cold to Hot strip --- */
.cold-hot-strip {
  position: relative;
  padding-block: var(--space-20);
  background: linear-gradient(90deg,
    color-mix(in oklab, var(--color-ice) 18%, var(--color-bg)) 0%,
    var(--color-bg) 50%,
    color-mix(in oklab, var(--color-ember) 18%, var(--color-bg)) 100%);
  border-block: 1px solid var(--color-border);
}
.cold-hot-strip__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-10);
  align-items: center;
  text-align: center;
}
.cold-hot-strip__side h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}
.cold-hot-strip__side--cold h3 { color: var(--color-ice); }
.cold-hot-strip__side--hot h3 { color: var(--color-ember); }
.cold-hot-strip__arrow {
  font-size: 2rem;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-weight: 300;
}
.cold-hot-strip__side p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-inline: auto;
  max-width: 32ch;
}
@media (max-width: 720px) {
  .cold-hot-strip__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .cold-hot-strip__arrow { transform: rotate(90deg); }
}

/* --- Mechanism / feature cards --- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}
.feature {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.feature__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
  display: block;
}
.feature h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: var(--space-3);
}
.feature p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.55;
}

/* --- Stats row --- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-1);
  margin-top: var(--space-12);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.stat {
  padding: var(--space-8) var(--space-6);
  border-right: 1px solid var(--color-border);
}
.stat:last-child { border-right: none; }
.stat__value {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-text);
  letter-spacing: -0.03em;
}
.stat__value em {
  font-style: italic;
  color: var(--color-primary);
}
.stat__label {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
@media (max-width: 720px) {
  .stat { border-right: none; border-bottom: 1px solid var(--color-border); }
  .stat:last-child { border-bottom: none; }
}

/* --- Section header pattern --- */
.section-head {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-12);
  align-items: end;
  margin-bottom: var(--space-12);
}
.section-head h2 { margin: 0; }
.section-head p { color: var(--color-text-muted); }
@media (max-width: 880px) {
  .section-head { grid-template-columns: 1fr; gap: var(--space-6); align-items: start; }
}

/* --- Two-column content --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: center;
}
.two-col img { border-radius: var(--radius-lg); width: 100%; }
@media (max-width: 880px) { .two-col { grid-template-columns: 1fr; } }

/* --- Pipeline tracker --- */
.pipeline {
  margin-top: var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}
.pipeline__row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 5fr;
  align-items: stretch;
  border-bottom: 1px solid var(--color-border);
}
.pipeline__row:last-child { border-bottom: none; }
.pipeline__row--head {
  background: var(--color-surface-offset);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  font-weight: 600;
}
.pipeline__cell {
  padding: var(--space-5) var(--space-6);
}
.pipeline__cell--asset strong {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  display: block;
  letter-spacing: -0.01em;
  color: var(--color-text);
}
.pipeline__cell--asset span {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.pipeline__stages {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-1);
  align-items: center;
  padding: var(--space-4) var(--space-5);
}
.pipeline__stage {
  position: relative;
  height: 8px;
  background: var(--color-surface-offset-2);
  border-radius: var(--radius-full);
}
.pipeline__stage--active {
  background: linear-gradient(90deg, var(--color-ice), var(--color-primary));
}
.pipeline__stage--label {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
}
@media (max-width: 880px) {
  .pipeline__row { grid-template-columns: 1fr; }
  .pipeline__row--head { display: none; }
  .pipeline__cell { padding: var(--space-4) var(--space-5); }
}

/* --- Page hero (interior pages) --- */
.page-hero {
  padding-top: clamp(var(--space-12), 6vw, var(--space-20));
  padding-bottom: clamp(var(--space-10), 5vw, var(--space-16));
  border-bottom: 1px solid var(--color-border);
}
.page-hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.page-hero h1 {
  font-size: var(--text-3xl);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.035em;
  max-width: 18ch;
}
.page-hero h1 em { font-style: italic; color: var(--color-primary); }
.page-hero p {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
}

/* --- Team grid --- */
.team-section { margin-top: var(--space-16); }
.team-section h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-10) var(--space-8);
}
@media (max-width: 800px) {
  .team-grid { grid-template-columns: 1fr; gap: var(--space-8); }
}
.person {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-5);
  align-items: start;
}
@media (max-width: 480px) {
  .person { grid-template-columns: 96px 1fr; gap: var(--space-4); }
}
.person__avatar {
  width: 140px;
  height: 140px;
  aspect-ratio: 1;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text-muted);
  font-weight: 300;
  border: 1px solid var(--color-border);
  overflow: hidden;
  flex-shrink: 0;
}
@media (max-width: 480px) {
  .person__avatar { width: 96px; height: 96px; }
}
.person__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(100%);
}
.person__body { min-width: 0; }
.person__name {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.25;
}
.person__role {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-3);
  letter-spacing: 0.01em;
}
.person__bio {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}
.person__bio p + p { margin-top: var(--space-3); }

/* --- News list --- */
.news-list { display: grid; gap: var(--space-2); margin-top: var(--space-8); }
.news-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}
.news-item__date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.news-item__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-lg);
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.news-item__title a {
  color: inherit;
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.25s ease, color 0.2s ease;
}
.news-item__title a:hover,
.news-item__title a:focus-visible {
  color: var(--color-accent);
  background-size: 100% 1px;
}
.news-item__source {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
@media (max-width: 720px) {
  .news-item { grid-template-columns: 1fr; gap: var(--space-2); }
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  margin-top: var(--space-12);
  align-items: start;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.form { display: grid; gap: var(--space-5); }
.form label { display: grid; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; }
.form input,
.form textarea {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-base);
}
.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 20%, transparent);
}
.form textarea { min-height: 140px; resize: vertical; }

.contact-info { font-size: var(--text-base); }
.contact-info dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  font-weight: 600;
}
.contact-info dt:first-child { margin-top: 0; }
.contact-info dd { color: var(--color-text); font-family: var(--font-display); font-weight: 400; font-size: var(--text-lg); }

/* --- Footer --- */
.site-footer {
  margin-top: var(--space-24);
  padding-block: var(--space-16) var(--space-8);
  background: var(--color-text);
  color: var(--color-text-inverse);
}
.site-footer a { color: var(--color-text-inverse); opacity: 0.75; }
.site-footer a:hover { opacity: 1; text-decoration: none; }
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: var(--space-10);
}
@media (max-width: 880px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}
.site-footer__brand { color: var(--color-text-inverse); }
.site-footer__brand .brand__name { color: var(--color-text-inverse); }
.site-footer__brand .brand__name span { color: rgba(245, 242, 236, 0.6); }
.site-footer__brand p {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: rgba(245, 242, 236, 0.65);
  max-width: 30ch;
  line-height: 1.55;
}
.site-footer h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(245, 242, 236, 0.6);
  margin-bottom: var(--space-4);
}
.site-footer ul { display: grid; gap: var(--space-2); list-style: none; }
.site-footer ul a { font-size: var(--text-sm); }
.site-footer__bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(245, 242, 236, 0.15);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(245, 242, 236, 0.5);
  letter-spacing: 0.04em;
}

/* --- Quote / pullout --- */
.callout {
  padding: var(--space-10);
  border-left: 3px solid var(--color-primary);
  background: var(--color-surface);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin-block: var(--space-12);
}
.callout p {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: var(--text-xl);
  line-height: 1.3;
  color: var(--color-text);
  letter-spacing: -0.015em;
  max-width: none;
}
.callout cite {
  display: block;
  margin-top: var(--space-5);
  font-style: normal;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* --- Disclosure / footnote --- */
.disclosure {
  margin-top: var(--space-10);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-left: 2px solid var(--color-border);
}

/* --- Animations ---
   Default: visible. JS adds .js-reveal-enabled to <html> which then hides until is-visible.
   This way users without JS / before JS loads see content normally. */
.reveal { opacity: 1; transform: none; }
.js-reveal-enabled .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms cubic-bezier(0.16, 1, 0.3, 1), transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
.js-reveal-enabled .reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .js-reveal-enabled .reveal { opacity: 1; transform: none; transition: none; }
}

/* --- Skip link --- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  z-index: 100;
  font-size: var(--text-sm);
}
.skip-link:focus { top: var(--space-4); }