/* Landing page (marketing). Stacks vertical sections over the
   shared star-field background. */

html, body { height: auto; overflow-x: hidden; overflow-y: auto; }

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: rgba(4, 8, 16, 0.6);
  border-bottom: 1px solid rgba(26, 48, 96, 0.55);
  backdrop-filter: blur(14px);
}
.site-nav .nav-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.site-nav .brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.22em;
  color: var(--accent);
  text-shadow: 0 0 14px rgba(0, 229, 160, 0.5);
}
.site-nav .brand .sub { color: var(--text3); margin-left: 4px; }

.site-nav .nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Language toggle pill ----------------------------------------------- */
.lang-toggle {
  display: inline-flex;
  background: rgba(15, 30, 54, 0.6);
  border: 1px solid var(--border2);
  border-radius: 999px;
  overflow: hidden;
  backdrop-filter: blur(6px);
}
.lang-toggle button {
  background: transparent;
  border: none;
  color: var(--text2);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.08em;
}
.lang-toggle button.active {
  background: var(--accent);
  color: var(--bg);
}
.lang-toggle button:hover:not(.active) { color: var(--accent); }

.site-nav .signin-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text2);
}
.site-nav .signin-link:hover { color: var(--accent); }

/* Sections ----------------------------------------------------------- */
section {
  position: relative;
  z-index: 1;
  padding: 110px 28px;
  max-width: 1200px;
  margin: 0 auto;
}
.kicker {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  border: 1px solid rgba(0, 229, 160, 0.35);
  border-radius: 999px;
  background: rgba(0, 229, 160, 0.06);
  margin-bottom: 22px;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 36px;
  line-height: 1.18;
  letter-spacing: 0.04em;
  color: var(--text);
  margin: 0 0 22px;
}
.section-title.center { text-align: center; }
.section-lead {
  font-size: 16px;
  color: var(--text2);
  max-width: 760px;
  line-height: 1.7;
}
.section-lead.center { text-align: center; margin-left: auto; margin-right: auto; }

/* Hero -------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 140px 28px 80px;
  position: relative;
}
.hero .kicker { font-size: 10px; }
.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 72px;
  line-height: 1.05;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-shadow:
    0 0 20px rgba(0, 229, 160, 0.55),
    0 0 60px rgba(0, 229, 160, 0.25);
  margin: 8px auto 22px;
  max-width: 900px;
}
.hero .hero-sub {
  font-size: 17px;
  color: var(--text2);
  max-width: 720px;
  line-height: 1.7;
  margin: 0 auto 36px;
}
.hero .cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero .scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  letter-spacing: 0.2em;
  animation: bob 2.6s ease-in-out infinite;
}
.hero .scroll-hint .material-symbols-outlined { font-size: 18px; }
@keyframes bob {
  0%, 100% { transform: translate(-50%, 0);   opacity: 0.6; }
  50%      { transform: translate(-50%, 6px); opacity: 1; }
}

/* Problem ----------------------------------------------------------- */
.problem-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 48px;
}
.stat-card {
  position: relative;
  background: rgba(11, 22, 40, 0.55);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px 22px;
  backdrop-filter: blur(10px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}
.stat-card .value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 48px;
  letter-spacing: 0.02em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 14px;
  text-shadow: 0 0 18px rgba(0, 229, 160, 0.35);
}
.stat-card.warn .value { color: var(--amber); text-shadow: 0 0 18px rgba(245, 158, 11, 0.35); }
.stat-card.alert .value { color: var(--red);  text-shadow: 0 0 18px rgba(239, 68, 68, 0.35); }
.stat-card .body {
  font-size: 13px;
  color: var(--text2);
  line-height: 1.55;
}

/* Mission ----------------------------------------------------------- */
.mission {
  background: linear-gradient(180deg,
    rgba(11, 22, 40, 0.45) 0%,
    rgba(15, 30, 54, 0.35) 100%);
  border-block: 1px solid var(--border);
  padding-block: 110px;
  margin-block: 0;
  max-width: none;
}
.mission .mission-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
/* Mission partnership mark — CI flag × NASA logo (right column) ----- */
.mission-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
  padding: 38px 32px;
  background: rgba(11, 22, 40, 0.55);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
  max-width: 460px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}
/* Subtle accent halo behind the logos */
.mission-mark::before {
  content: '';
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 80%;
  background: radial-gradient(ellipse at 50% 30%,
    rgba(0, 229, 160, 0.18) 0%,
    rgba(0, 229, 160, 0.0) 60%);
  pointer-events: none;
}

.mission-mark .mark-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  position: relative;
  z-index: 1;
}

.mission-mark .mark-frame {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 140px;
  height: 96px;
  border-radius: 12px;
  background: rgba(7, 13, 26, 0.85);
  border: 1px solid var(--border2);
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.45);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.mission-mark .mark-flag img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.mission-mark .mark-nasa {
  background: #fff;
}
.mission-mark .mark-nasa img {
  width: 72px;
  height: 72px;
  display: block;
}

.mission-mark .mark-cross {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 16px rgba(0, 229, 160, 0.65);
}

.mission-mark .mark-titles {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--text);
  position: relative;
  z-index: 1;
}
.mission-mark .mark-title-ci   { color: var(--text); }
.mission-mark .mark-title-nasa { color: var(--accent); text-shadow: 0 0 12px rgba(0, 229, 160, 0.5); }
.mission-mark .mark-title-sep  { color: var(--text3); }

.mission-mark .mark-caption {
  margin: 0;
  max-width: 360px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--text2);
  position: relative;
  z-index: 1;
}

/* Idle hovering animation — two phases, slightly offset so the two
   logos don't move in lockstep. Pure transform, no layout impact. */
@keyframes floatA {
  0%, 100% { transform: translateY(0)     rotate(-0.4deg); }
  50%      { transform: translateY(-7px)  rotate(0.4deg);  }
}
@keyframes floatB {
  0%, 100% { transform: translateY(-3px)  rotate(0.5deg);  }
  50%      { transform: translateY(5px)   rotate(-0.5deg); }
}
.mission-mark .float-a { animation: floatA 5.5s ease-in-out infinite; }
.mission-mark .float-b { animation: floatB 6.2s ease-in-out infinite; }
.mission-mark .float-a:hover,
.mission-mark .float-b:hover {
  animation-play-state: paused;
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 14px 32px rgba(0, 229, 160, 0.25);
}

@media (prefers-reduced-motion: reduce) {
  .mission-mark .float-a,
  .mission-mark .float-b { animation: none; }
}

/* How it works ------------------------------------------------------ */
.how-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 48px;
  counter-reset: step;
}
.step-card {
  background: rgba(11, 22, 40, 0.55);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.step-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(0, 229, 160, 0.06) 0%,
    transparent 50%);
  pointer-events: none;
}
.step-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.step-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
  position: relative;
}
.step-card h3 {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--text);
  margin: 0 0 12px;
  position: relative;
}
.step-card p {
  font-size: 13px;
  color: var(--text2);
  line-height: 1.6;
  margin: 0;
  position: relative;
}

/* Features ---------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

/* CTA banner -------------------------------------------------------- */
.cta-banner {
  margin: 0 auto;
  max-width: 1080px;
  background:
    radial-gradient(ellipse at center, rgba(0, 229, 160, 0.12) 0%, transparent 70%),
    rgba(11, 22, 40, 0.7);
  border: 1px solid rgba(0, 229, 160, 0.35);
  border-radius: 18px;
  padding: 60px 40px;
  text-align: center;
  backdrop-filter: blur(14px);
}
.cta-banner h2 {
  font-size: 36px;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-shadow: 0 0 24px rgba(0, 229, 160, 0.35);
}
.cta-banner p {
  font-size: 15px;
  color: var(--text2);
  max-width: 560px;
  margin: 0 auto 28px;
}

/* Partners --------------------------------------------------------- */
.partners {
  text-align: center;
  border-top: 1px solid var(--border);
  padding-block: 90px;
  background: rgba(4, 8, 16, 0.45);
  max-width: none;
}
.partners-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}
.partners p.section-lead {
  margin: 0 auto 44px;
  text-align: center;
}
.partners-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 40px;
}
.partner-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text3);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  transition: color 0.2s ease, transform 0.2s ease;
}
.partner-mark:hover { color: var(--text); transform: translateY(-2px); }
.partner-mark .logo-frame {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: rgba(15, 30, 54, 0.6);
  border: 1px solid var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}
.partner-mark .logo-frame img,
.partner-mark .logo-frame svg {
  max-width: 100%;
  max-height: 100%;
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.1));
}

/* Footer ----------------------------------------------------------- */
.site-footer {
  padding: 30px 28px 40px;
  text-align: center;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text3);
  background: rgba(4, 8, 16, 0.6);
}

/* Responsive ------------------------------------------------------- */
@media (max-width: 980px) {
  .hero h1                    { font-size: 48px; }
  .section-title              { font-size: 28px; }
  .problem-stats              { grid-template-columns: repeat(2, 1fr); }
  .how-steps,
  .features-grid              { grid-template-columns: 1fr; }
  .mission .mission-inner     { grid-template-columns: 1fr; gap: 36px; }
  .site-nav                   { padding: 12px 18px; }
  section                     { padding: 80px 20px; }
}

/* Tablet / large phone ---------------------------------------------- */
@media (max-width: 720px) {
  /* Nav — wrap, tighter spacing. NASA / USJ-CI taglines hidden via
     the existing rule in components.css. */
  .site-nav                   { padding: 10px 14px; gap: 8px; flex-wrap: wrap; }
  .site-nav .nav-left         { gap: 10px; }
  .site-nav .nav-right        { gap: 10px; }

  .hero                       { padding: 110px 18px 70px; min-height: 88vh; }
  .hero h1                    { font-size: 38px; letter-spacing: 0.03em; }
  .hero .hero-sub             { font-size: 15px; }
  .hero .cta-row .btn         { padding: 12px 22px; font-size: 10.5px; }

  .section-title              { font-size: 24px; line-height: 1.22; }
  .section-lead               { font-size: 14.5px; }

  .stat-card                  { padding: 20px 18px; }
  .stat-card .value           { font-size: 38px; }

  .mission                    { padding-block: 72px; }
  .mission .mission-inner     { padding: 0 18px; gap: 28px; }
  .mission-mark               { padding: 26px 22px; max-width: 100%; gap: 18px; }
  .mission-mark .mark-row     { gap: 18px; }
  .mission-mark .mark-frame   { width: 110px; height: 76px; }
  .mission-mark .mark-nasa img{ width: 56px; height: 56px; }
  .mission-mark .mark-cross   { font-size: 22px; }
  .mission-mark .mark-titles  { font-size: 11px; letter-spacing: 0.18em; gap: 8px; flex-wrap: wrap; justify-content: center; }
  .mission-mark .mark-caption { font-size: 11.5px; }

  .cta-banner                 { padding: 42px 24px; }
  .cta-banner h2              { font-size: 26px; }

  .partners                   { padding-block: 64px; }
  .partner-mark .logo-frame   { width: 64px; height: 64px; padding: 10px; }
  .partners-row               { gap: 28px; }

  .site-footer                { font-size: 10px; padding: 24px 18px 30px; line-height: 1.7; }
}

/* Small phones ------------------------------------------------------ */
@media (max-width: 540px) {
  .problem-stats              { grid-template-columns: 1fr; }
  .hero h1                    { font-size: 34px; }
  .cta-banner                 { padding: 36px 22px; }
  .cta-banner h2              { font-size: 24px; }
}

/* Compact phones (iPhone SE, small Androids) ------------------------ */
@media (max-width: 420px) {
  section                     { padding: 64px 16px; }
  .hero                       { padding: 100px 14px 64px; }
  .hero h1                    { font-size: 30px; letter-spacing: 0.02em; }
  .hero .hero-sub             { font-size: 14px; }
  .hero .cta-row              { gap: 10px; }
  .hero .cta-row .btn         { padding: 11px 18px; font-size: 10px; width: 100%; }

  .section-title              { font-size: 21px; }
  .stat-card .value           { font-size: 30px; }

  .mission-mark               { padding: 22px 18px; }
  .mission-mark .mark-row     { gap: 12px; }
  .mission-mark .mark-frame   { width: 92px; height: 64px; }
  .mission-mark .mark-nasa img{ width: 48px; height: 48px; }
  .mission-mark .mark-cross   { font-size: 18px; }

  .cta-banner                 { padding: 30px 16px; border-radius: 14px; }
  .cta-banner h2              { font-size: 22px; }
  .cta-banner p               { font-size: 13.5px; }

  /* USJ-CI badge keeps its monogram but drops the divider on
     ultra-narrow screens so the nav row breathes. */
  .site-nav .nav-divider      { display: none; }
}