:root {
  --ink: #12171a;
  --ink-soft: #4a555c;
  --paper: #f3f5f6;
  --panel: #ffffff;
  --line: #d5dce1;
  --accent: #1f5c4d;
  --accent-deep: #164438;
  --danger: #8b2e2e;
  --ok: #1f6b3a;
  --sans: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --col-pad-x: clamp(1.5rem, 4vw, 3.5rem);
  --col-pad-y: clamp(1.25rem, 3vh, 2rem);
  --header-h: 64px;
  --urgency-h: 44px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-deep);
}

/* --- Site chrome --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 var(--col-pad-x);
  background: rgba(247, 248, 249, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.urgency-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 49;
  min-height: var(--urgency-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem var(--col-pad-x);
  background: #12171a;
  color: #f3f5f6;
}

.urgency-bar-text {
  margin: 0;
  font-size: 0.9rem;
}

.urgency-bar-text strong {
  color: #9ec9bc;
  font-weight: 600;
}

.urgency-bar-cta {
  flex: 0 0 auto;
  color: #12171a !important;
  background: #f3f5f6;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
}

.urgency-bar-cta:hover {
  background: #9ec9bc;
}

.date-hero {
  margin: 0 0 1.15rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: #fff;
  max-width: 34rem;
}

.date-hero-label {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.date-hero-date {
  margin: 0.35rem 0 0;
  font-size: clamp(1.35rem, 2.4vw, 1.7rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}

.date-hero-sub {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
  flex: 0 0 auto;
}

.brand-mark {
  width: 0.7rem;
  height: 0.7rem;
  background: var(--accent);
}

.brand-logo {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.35rem;
  display: block;
  flex: 0 0 auto;
}

.footer-brand .brand-logo {
  width: 1.5rem;
  height: 1.5rem;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  background: var(--ink) !important;
  color: #f5f7f8 !important;
  padding: 0.55rem 0.85rem;
  font-weight: 600 !important;
  font-size: 0.88rem !important;
  text-decoration: none;
}

.nav-cta:hover {
  background: var(--accent-deep) !important;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.45rem 0.7rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 2.25rem var(--col-pad-x) 2rem;
  width: 100%;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  max-width: 1120px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.footer-grid p,
.footer-grid li {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.footer-grid h3 {
  margin: 0 0 0.65rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-grid li + li {
  margin-top: 0.4rem;
}

.footer-grid a {
  color: var(--ink);
  text-decoration: none;
}

.footer-grid a:hover {
  color: var(--accent-deep);
}

.footer-meta {
  max-width: 1120px;
  margin-top: 1.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

/* --- Shared page bits --- */
.kicker {
  margin: 0 0 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 3.6vw, 2.85rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.12;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.lede {
  margin: 1rem 0 0;
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 36rem;
}

.page {
  padding: clamp(2.5rem, 6vh, 4rem) var(--col-pad-x) 4rem;
}

.page-narrow {
  max-width: 720px;
}

.page-wide {
  max-width: 1120px;
  margin: 0 auto;
}

/* Full-bleed content pages */
.page-fill {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.content-hero {
  flex: 1;
  min-height: calc(100vh - var(--header-h) - var(--urgency-h));
  min-height: calc(100dvh - var(--header-h) - var(--urgency-h));
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.content-hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vh, 4rem) var(--col-pad-x);
  background: linear-gradient(165deg, #f7f8f9 0%, #eef1f3 55%, #e8ecef 100%);
}

.content-hero-copy h1 {
  max-width: 16ch;
}

.content-hero-copy .lede,
.content-hero-copy p {
  max-width: 36rem;
}

.content-hero-media {
  position: relative;
  min-height: 100%;
  overflow: hidden;
  background: #1a2228;
}

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

.content-band {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2.5rem, 7vh, 4.5rem) var(--col-pad-x);
  background: #fff;
  border-top: 1px solid var(--line);
}

.content-band-alt {
  background: #f3f5f6;
}

.content-band-inner {
  width: 100%;
  max-width: none;
}

.standards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.faq-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.host-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
  align-items: stretch;
}

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.privacy-card {
  border: 1px solid var(--line);
  background: #fff;
  padding: 1.25rem 1.35rem;
}

.privacy-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.privacy-card p {
  margin: 0;
  color: var(--ink-soft);
  max-width: none;
}

.contact-fill {
  flex: 1;
  min-height: calc(100vh - var(--header-h) - var(--urgency-h));
  min-height: calc(100dvh - var(--header-h) - var(--urgency-h));
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.contact-fill-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vh, 4rem) var(--col-pad-x);
  background: linear-gradient(165deg, #f7f8f9 0%, #eef1f3 55%, #e8ecef 100%);
}

.contact-fill-form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vh, 4rem) var(--col-pad-x);
  background: #fff;
  border-left: 1px solid var(--line);
}

.contact-fill-form .contact-form {
  max-width: 32rem;
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: var(--ink);
  color: #f5f7f8;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.1rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-secondary:hover {
  background: #fff;
  color: var(--ink);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* --- Home --- */
.home-hero {
  min-height: calc(100vh - var(--header-h) - var(--urgency-h));
  min-height: calc(100dvh - var(--header-h) - var(--urgency-h));
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.home-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vh, 4rem) var(--col-pad-x);
  background: linear-gradient(165deg, #f7f8f9 0%, #eef1f3 55%, #e8ecef 100%);
}

.home-copy h1 {
  max-width: 14ch;
}

.home-visual {
  position: relative;
  overflow: hidden;
  background: #1a2228;
  min-height: 420px;
}

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

.home-visual-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(18, 23, 26, 0.5) 0%, transparent 45%);
}

.home-visual-caption {
  position: absolute;
  left: 1.5rem;
  right: 1.5rem;
  bottom: 1.5rem;
  margin: 0;
  color: #f3f5f6;
  font-weight: 500;
}

.band {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: clamp(2.5rem, 6vh, 4rem) var(--col-pad-x);
}

.band-alt {
  background: #f3f5f6;
}

.band-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.feature-session {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2rem;
  align-items: stretch;
  border: 1px solid var(--line);
  background: #fff;
}

.feature-session-copy {
  padding: 1.75rem;
}

.feature-session-meta {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.feature-session-meta strong {
  color: var(--ink);
  font-weight: 600;
}

.feature-session-side {
  background: #12171a;
  color: #f3f5f6;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.feature-session-side p {
  margin: 0;
  color: rgba(243, 245, 246, 0.78);
}

.feature-session-side .btn {
  background: #f3f5f6;
  color: var(--ink);
  align-self: flex-start;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.pillar {
  border: 1px solid var(--line);
  background: #fff;
  padding: 1.35rem;
}

.pillar h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.pillar p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.who-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.25rem;
}

.who-grid ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
}

.who-grid li + li {
  margin-top: 0.45rem;
}

/* --- Briefing (signup) --- */
.viewport {
  min-height: calc(100vh - var(--header-h) - var(--urgency-h));
  min-height: calc(100dvh - var(--header-h) - var(--urgency-h));
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(165deg, #f7f8f9 0%, #eef1f3 55%, #e8ecef 100%);
  padding: var(--col-pad-y) var(--col-pad-x);
  animation: fade-in 0.55s ease-out both;
}

.panel-body {
  max-width: 34rem;
  animation: rise 0.65s ease-out 0.08s both;
}

.session-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.session-meta strong {
  color: var(--ink);
}

.takeaway {
  margin: 1.1rem 0 0;
  padding: 0.85rem 0.95rem;
  border-left: 3px solid var(--accent);
  background: rgba(31, 92, 77, 0.06);
  font-size: 0.95rem;
  color: var(--ink-soft);
  max-width: 34rem;
}

.takeaway strong {
  color: var(--ink);
}

.takeaway-inline {
  max-width: none;
}

.agenda-compact {
  margin: 1.1rem 0 0;
  max-width: 34rem;
}

.agenda-compact-label {
  margin: 0 0 0.4rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.agenda-compact ol {
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
}

.agenda-compact li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 0.65rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.agenda-compact li:first-child {
  border-top: 0;
}

.agenda-compact li span {
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.doc-unlock {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  background: rgba(31, 92, 77, 0.06);
  display: grid;
  gap: 0.75rem;
  max-width: 34rem;
}

.doc-unlock p {
  margin: 0;
  color: var(--ink);
}

.signup {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.55rem;
  padding: 1.15rem 1.15rem 1.25rem;
  background: var(--panel);
  border: 1px solid var(--line);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.field {
  display: grid;
  gap: 0.3rem;
}

.signup label,
.contact-form label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.signup input,
.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 0.7rem 0.75rem;
  font: inherit;
  font-size: 0.95rem;
}

.signup input:focus,
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(31, 92, 77, 0.28);
  border-color: var(--accent);
}

.field-hint {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.signup button,
.contact-form button {
  margin-top: 0.35rem;
  border: 0;
  background: var(--ink);
  color: #f5f7f8;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.signup button:hover,
.contact-form button:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.signup button:disabled,
.contact-form button:disabled {
  opacity: 0.6;
  cursor: wait;
  transform: none;
}

.form-status {
  min-height: 1.2rem;
  margin: 0.15rem 0 0;
  font-size: 0.88rem;
}

.form-status.error {
  color: var(--danger);
}

.form-status.ok {
  color: var(--ok);
}

.visual {
  position: relative;
  min-height: calc(100vh - var(--header-h) - var(--urgency-h));
  min-height: calc(100dvh - var(--header-h) - var(--urgency-h));
  overflow: hidden;
  background: #1a2228;
  animation: fade-in 0.8s ease-out 0.12s both;
}

.visual-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.02);
  transition: transform 8s ease-out;
}

.visual:hover .visual-img {
  transform: scale(1.06);
}

.visual-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(18, 23, 26, 0.22) 0%, transparent 35%),
    linear-gradient(0deg, rgba(18, 23, 26, 0.55) 0%, transparent 42%);
  pointer-events: none;
}

.visual-caption {
  position: absolute;
  left: 1.5rem;
  right: 1.5rem;
  bottom: 1.5rem;
  margin: 0;
  color: #f3f5f6;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  max-width: 22rem;
}

.details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 70vh;
  background: #fff;
  border-top: 1px solid var(--line);
}

.details-copy {
  padding: clamp(2rem, 6vh, 4rem) var(--col-pad-x);
  width: 100%;
}

.details ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
}

.details li + li {
  margin-top: 0.55rem;
}

.aside {
  margin-top: 1.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.details-media {
  min-height: 100%;
  overflow: hidden;
  background: #dfe5e9;
}

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

.agenda-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.agenda-list li {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.agenda-list strong {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* --- About / FAQ / Contact --- */
.prose p {
  color: var(--ink-soft);
  max-width: 40rem;
}

.prose p + p {
  margin-top: 1rem;
}

.standards li {
  border: 1px solid var(--line);
  background: #fff;
  padding: 1.25rem 1.35rem;
  min-height: 8.5rem;
}

.standards strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.05rem;
}

.standards span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.host-block {
  padding: 1.5rem;
  border: 1px solid var(--line);
  background: #fff;
  height: 100%;
}

.host-block h3 {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
}

.host-block p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  max-width: none;
}

.host-cta {
  border: 1px solid var(--line);
  background: #12171a;
  color: #f3f5f6;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  height: 100%;
}

.host-cta p {
  margin: 0;
  color: rgba(243, 245, 246, 0.78);
  max-width: none;
}

.host-cta .btn {
  background: #f3f5f6;
  color: var(--ink);
  align-self: flex-start;
}

.faq-item {
  border: 1px solid var(--line);
  background: #fff;
  padding: 1.25rem 1.35rem;
  min-height: 8rem;
}

.faq-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.faq-item p {
  margin: 0;
  color: var(--ink-soft);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2.5rem;
  align-items: start;
  max-width: 1120px;
}

.contact-form {
  display: grid;
  gap: 0.55rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: #fff;
}

.contact-form textarea {
  min-height: 160px;
  resize: vertical;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #f7f8f9;
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.85rem var(--col-pad-x);
  }

  .nav-cta {
    margin: 0.35rem var(--col-pad-x) 0.75rem;
    justify-content: center;
  }

  .urgency-bar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .urgency-bar-text {
    font-size: 0.82rem;
  }

  .home-hero,
  .viewport,
  .details,
  .feature-session,
  .pillars,
  .who-grid,
  .contact-layout,
  .content-hero,
  .contact-fill,
  .standards,
  .faq-list,
  .host-grid,
  .privacy-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .content-hero,
  .contact-fill {
    min-height: auto;
  }

  .content-hero-media {
    min-height: 38vh;
    order: -1;
  }

  .contact-fill-form {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .visual {
    min-height: 42vh;
    order: -1;
  }

  .home-visual {
    min-height: 38vh;
    order: -1;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .details-media {
    min-height: 280px;
  }
}