:root {
  color-scheme: dark;
  --bg: #060b14;
  --bg-elevated: rgba(10, 16, 28, 0.82);
  --panel: rgba(14, 24, 40, 0.78);
  --panel-strong: rgba(17, 29, 47, 0.92);
  --text: #f2f6ff;
  --muted: #8ea0bf;
  --line: rgba(156, 177, 214, 0.16);
  --accent: #88f2ff;
  --accent-strong: #2dd4ea;
  --glow: rgba(45, 212, 234, 0.24);
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.35);
  --font-display: "Segoe UI", "Inter", "PingFang SC", sans-serif;
  --font-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(45, 212, 234, 0.2), transparent 30%),
    radial-gradient(circle at 85% 18%, rgba(99, 102, 241, 0.18), transparent 20%),
    linear-gradient(180deg, #060b14 0%, #08111e 55%, #05080f 100%);
  color: var(--text);
  font-family: var(--font-display);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(150, 170, 210, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(150, 170, 210, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 92%);
}

.site-shell {
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.topbar,
.hero,
.capability-grid,
.feature-grid,
.footer {
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 28px var(--glow);
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
}

.micro-label,
.section-kicker,
.status-pill,
.item-index,
.micro-copy {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.text-link {
  color: var(--accent);
  text-decoration: none;
}

.text-link:hover {
  color: #c6fbff;
}

.hero {
  min-height: calc(100vh - 120px);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: end;
  gap: 40px;
  padding: 46px 0 68px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow,
.section-kicker {
  color: var(--accent);
  font-size: 12px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  margin-top: 18px;
  font-size: clamp(2.9rem, 7.8vw, 5.8rem);
  line-height: 0.97;
  letter-spacing: -0.05em;
}

.hero-text,
.panel-intro,
.capability-item p,
.footer,
.brief-summary,
.brief-meta,
.brief-point,
.ask-response,
.archive-summary,
.archive-meta {
  color: var(--muted);
}

.hero-text {
  max-width: 620px;
  margin-top: 22px;
  font-size: 1.1rem;
  line-height: 1.8;
}

.hero-actions,
.form-meta,
.suggestion-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, rgba(136, 242, 255, 0.18), rgba(45, 212, 234, 0.28));
  color: var(--text);
  border-color: rgba(136, 242, 255, 0.35);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 0 36px rgba(45, 212, 234, 0.12);
}

.button-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.hero-visual {
  position: relative;
  min-height: 560px;
  border: 1px solid var(--line);
  border-radius: 32px;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 18%, rgba(45, 212, 234, 0.26), transparent 25%),
    radial-gradient(circle at 80% 30%, rgba(99, 102, 241, 0.22), transparent 24%),
    linear-gradient(180deg, rgba(14, 24, 40, 0.92) 0%, rgba(7, 12, 23, 0.98) 100%);
  box-shadow: var(--shadow);
}

.signal-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(136, 242, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(136, 242, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
}

.signal-card {
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: min(420px, calc(100% - 48px));
  padding: 22px;
  border: 1px solid rgba(136, 242, 255, 0.18);
  border-radius: 24px;
  background: rgba(5, 9, 18, 0.72);
  backdrop-filter: blur(16px);
}

.signal-label {
  display: inline-block;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-news-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.hero-news-meta {
  color: rgba(142, 160, 191, 0.74);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.hero-news-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.hero-news-item {
  display: block;
  padding-top: 14px;
  border-top: 1px solid rgba(136, 242, 255, 0.12);
  color: inherit;
  text-decoration: none;
  transition:
    transform 180ms ease,
    border-color 180ms ease;
}

.hero-news-item:hover,
.hero-news-item:focus-visible {
  transform: translateX(3px);
  border-top-color: rgba(136, 242, 255, 0.28);
}

.hero-news-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

.hero-news-source {
  color: var(--accent);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-news-date {
  color: rgba(142, 160, 191, 0.82);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
}

.hero-news-item h3 {
  margin-top: 8px;
  font-size: 0.98rem;
  line-height: 1.45;
  font-weight: 600;
}

.capabilities,
.feature-grid {
  margin-top: 42px;
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.section-heading h2 {
  max-width: 780px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.capability-item,
.feature-panel {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(14px);
}

.capability-item {
  padding: 24px;
}

.item-index {
  display: inline-block;
  margin-bottom: 18px;
  color: rgba(136, 242, 255, 0.7);
  font-size: 12px;
}

.capability-item h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.capability-item p {
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 22px;
}

.feature-grid-single {
  grid-template-columns: 1fr;
}

.feature-panel {
  padding: 24px;
  box-shadow: var(--shadow);
}

.ask-panel {
  max-width: 760px;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-head h2 {
  font-size: 2rem;
  letter-spacing: -0.04em;
}

.status-pill {
  padding: 8px 12px;
  border: 1px solid rgba(136, 242, 255, 0.2);
  border-radius: 999px;
  color: var(--accent);
  font-size: 11px;
}

.loading-copy {
  min-height: 220px;
}

.brief-headlines {
  display: grid;
  gap: 12px;
  margin-top: 16px;
  padding: 0;
  list-style: none;
}

.headline-item {
  display: block;
  padding-top: 14px;
  color: inherit;
  text-decoration: none;
  border-top: 1px solid rgba(136, 242, 255, 0.12);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

.headline-item:hover,
.headline-item:focus-visible {
  transform: translateX(4px);
  border-top-color: rgba(136, 242, 255, 0.32);
}

.headline-copy {
  min-width: 0;
}

.headline-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.headline-source {
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.headline-date {
  color: rgba(142, 160, 191, 0.82);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.headline-copy h4 {
  margin-top: 6px;
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 600;
}

.brief-meta {
  margin-top: 4px;
  font-size: 0.92rem;
}

.ask-form {
  display: grid;
  gap: 16px;
}

.ask-form label {
  display: grid;
  gap: 10px;
}

.ask-form span {
  color: var(--text);
  font-size: 0.95rem;
}

.ask-form input,
.ask-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
  color: var(--text);
  font: inherit;
}

.ask-form textarea {
  resize: vertical;
  min-height: 118px;
}

.ask-form input:focus,
.ask-form textarea:focus,
.button:focus,
.suggestion-chip:focus,
.text-link:focus {
  outline: 2px solid rgba(136, 242, 255, 0.42);
  outline-offset: 2px;
}

.suggestion-chip {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.suggestion-chip:hover {
  color: var(--text);
  border-color: rgba(136, 242, 255, 0.22);
  transform: translateY(-1px);
}

.form-meta {
  align-items: center;
  justify-content: space-between;
}

.ask-response {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  line-height: 1.75;
  white-space: pre-wrap;
}

.hidden {
  display: none;
}

.footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding: 36px 0 8px;
  font-size: 0.95rem;
}

.footer-meta {
  color: rgba(142, 160, 191, 0.7);
}

.briefs-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 22px;
  margin-top: 40px;
}

.archive-list {
  display: grid;
  gap: 12px;
}

.archive-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(13, 22, 37, 0.72);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    background-color 180ms ease;
}

.archive-item:hover,
.archive-item.active {
  transform: translateY(-1px);
  border-color: rgba(136, 242, 255, 0.22);
  background: rgba(15, 28, 45, 0.9);
}

.archive-date {
  color: var(--accent);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.archive-item h3 {
  margin-top: 10px;
  font-size: 1.1rem;
  line-height: 1.35;
}

.archive-summary {
  margin-top: 10px;
  line-height: 1.6;
}

.archive-meta {
  margin-top: 14px;
  font-size: 0.9rem;
}

@media (max-width: 1100px) {
  .hero,
  .feature-grid,
  .briefs-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-bottom: 24px;
  }

  .hero-visual {
    min-height: 420px;
  }
}

@media (max-width: 820px) {
  .site-shell {
    width: min(100% - 28px, 1320px);
  }

  .topbar,
  .footer,
  .form-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .capability-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.8rem, 14vw, 4.4rem);
  }

  .section-heading h2,
  .panel-head h2 {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }
}