@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=DM+Sans:wght@500&display=swap');

:root {
  --bg: #f5f7fb;
  --bg-soft: radial-gradient(circle at 20% -30%, rgba(98,137,255,.2), transparent 45%),
              radial-gradient(circle at 80% -20%, rgba(74,222,128,.18), transparent 40%),
              #f5f7fb;
  --panel: #ffffff;
  --panel-muted: #f1f4fa;
  --text: #0f1c2f;
  --muted: #5f6b85;
  --brand: #2a76ff;
  --brand-soft: #79b4ff;
  --accent: #04c709;
  --danger: #cd1c18;
  --border: rgba(15,28,47,.08);
  --radius: 22px;
  --shadow: 0 25px 80px rgba(15,28,47,.1);
  --font: 'Inter', 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-soft);
  color: var(--text);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1200px, 92vw); margin: 0 auto; }

header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid rgba(15,28,47,.06);
  backdrop-filter: blur(12px);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid rgba(15,28,47,.08);
  background: var(--panel);
}
.brand-title {
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text);
  display: block;
}
.brand-subtitle { font-size: .75rem; color: var(--muted); display: block; }

nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0;
  padding: 0;
}
nav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  transition: color .2s ease, background .2s ease;
}
nav a:hover,
nav a.active {
  color: var(--text);
  background: rgba(42,118,255,.12);
}
.menu { display: none; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 24px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn.primary {
  background: linear-gradient(120deg, var(--brand), var(--brand-soft));
  color: #fff;
  box-shadow: 0 18px 40px rgba(42,118,255,.3);
}
.btn.ghost {
  border: 1px solid rgba(15,28,47,.12);
  color: var(--text);
  background: transparent;
}
.btn.secondary {
  align-items: left;
  background: rgba(15,28,47,.03);
  border: 1px solid rgba(15,28,47,.08);
  color: var(--text);
}

.hero { padding: 90px 0 50px; }
.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 36px;
  align-items: center;
}
.hero-copy h1 { font-size: clamp(34px, 5vw, 60px); line-height: 1.15; margin: 18px 0; }
.hero-copy p { color: var(--muted); margin-bottom: 24px; }
.badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(15,28,47,.05);
  border: 1px solid rgba(15,28,47,.08);
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.hero-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.hero-points li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(15,28,47,.08);
  background: var(--panel);
  color: var(--muted);
  box-shadow: 0 18px 46px rgba(15,28,47,.08);
}
.hero-points li::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-soft));
  flex-shrink: 0;
  box-shadow: 0 0 0 6px rgba(98,176,255,.18);
}

.card-hero {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid rgba(15,28,47,.08);
  padding: 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  box-shadow: var(--shadow);
}
.card-hero h3 { margin: 0 0 6px; }
.card-hero .meta { margin: 0 0 16px; color: var(--muted); }
.card-hero .insight-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.card-hero .insight-list strong { display: block; font-size: .75rem; letter-spacing: .08em; color: #5f6b85; text-transform: uppercase; }
.card-hero canvas { width: 190px !important; height: 190px !important; }

.workspace { padding: 90px 0; }
.analyze-card {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid rgba(15,28,47,.08);
  box-shadow: var(--shadow);
  padding: clamp(24px, 3vw, 40px);
}
.workspace-head { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
.workspace-head .eyebrow { margin: 0; color: var(--brand); text-transform: uppercase; letter-spacing: .15em; }
.workspace-head h2 { margin: 0; font-size: clamp(26px, 3vw, 36px); }
.workspace-guidelines { margin: 0; padding-left: 18px; color: var(--muted); }
.analyze-card textarea {
  width: 100%;
  min-height: 230px;
  border-radius: 20px;
  border: 1px solid rgba(15,28,47,.12);
  background: var(--panel-muted);
  color: var(--text);
  padding: 20px;
  font-size: 1rem;
  font-family: var(--font);
  transition: border .2s ease, box-shadow .2s ease, background .2s ease;
}
.analyze-card textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 2px rgba(98,176,255,.27);
  background: #fff;
}
.analysis-feedback {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.status { font-size: .92rem; color: var(--muted); }
.status-alert { min-height: 20px; }
.disclaimer {
  font-size: .9rem;
  color: var(--muted);
}

.how-it-works {
  padding: 90px 0 110px;
  background: rgba(255,255,255,.6);
  border-top: 1px solid rgba(15,28,47,.06);
}
.section-head { margin-bottom: 38px; }
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 26px;
}
.tile {
  position: relative;
  background: var(--panel);
  border: 1px solid rgba(15,28,47,.08);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  min-height: 230px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 25px 70px rgba(15,28,47,.12);
}
.tile::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(15,28,47,.05);
  pointer-events: none;
}
.tile .step { font-size: .72rem; letter-spacing: .2em; color: var(--brand); text-transform: uppercase; }
.tile h3 { margin: 0; }
.tile p { margin: 0; color: var(--muted); }

footer {
  padding: 40px 0;
  border-top: 1px solid rgba(15,28,47,.08);
  color: var(--muted);
}
.row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.justify-between { justify-content: space-between; }

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: rgba(255,255,255,.9);
  border-radius: 999px;
  border: 1px solid rgba(15,28,47,.08);
  padding: 10px 14px;
  color: var(--text);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .2s ease, transform .2s ease;
}
.to-top.show { opacity: 1; transform: translateY(0); }

.results-main { padding: 70px 0 140px; }
.results-card {
  background: var(--panel);
  border: 1px solid rgba(15,28,47,.08);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 42px);
  box-shadow: var(--shadow);
}
.results-claim { font-size: clamp(32px, 3.8vw, 48px); margin: 8px 0 12px; }
.results-meta { display: flex; gap: 24px; flex-wrap: wrap; color: var(--muted); padding-bottom: 1rem;}
.results-grid { display: flex; flex-direction: column; gap: 30px; }
.results-chart-wrap { width: min(320px, 80vw); margin: 0 auto 18px; }
.verdict-banner { margin: 0 0 6px; font-weight: 600; font-size: 1rem; }
.verdict-banner.verdict-factual { color: var(--accent); }
verdict-banner.verdict-misinformation { color: var(--danger); }
.results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.results-chart-wrap { width: min(320px, 80vw); margin: 0 auto 18px; }
.verdict-banner { margin: 0 0 6px; font-weight: 600; font-size: 1rem; }
.verdict-banner.verdict-factual { color: var(--accent); }
.verdict-banner.verdict-misinformation { color: var(--danger); }
.verdict-banner.verdict-neutral { color: var(--muted); }
.chart-summary { margin: 0 0 18px; color: var(--muted); }
.chart-placeholder {
  text-align: center;
  padding: 36px 0;
  color: var(--muted);
  background: rgba(15,28,47,.03);
  border-radius: var(--radius);
  border: 1px dashed rgba(15,28,47,.08);
}
.results-details { margin: 0; display: grid; gap: 12px; }
.results-details dt { color: var(--muted); }
.results-details dd { margin: 0; font-weight: 600; }
.results-raw {
  background: var(--panel-muted);
  border: 1px solid rgba(15,28,47,.1);
  border-radius: 16px;
  padding: 18px;
  color: var(--muted);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: .85rem;
  max-height: 320px;
  overflow: auto;
  white-space: pre-wrap;
}
.results-empty {
  text-align: center;
  border: 1px dashed rgba(15,28,47,.15);
  border-radius: var(--radius);
  padding: 60px 20px;
}

@media (max-width: 900px) {
  nav ul {
    display: none;
    position: absolute;
    top: 80px;
    left: 4vw;
    right: 4vw;
    flex-direction: column;
    background: rgba(255,255,255,.97);
    border-radius: var(--radius);
    border: 1px solid rgba(15,28,47,.08);
    padding: 16px;
  }
  nav ul.open { display: flex; }
  .menu {
    display: inline-flex;
    border: 1px solid rgba(15,28,47,.15);
    border-radius: 999px;
    background: transparent;
    color: var(--text);
    padding: 8px 12px;
  }
  .nav-actions { display: none; }
  .analysis-feedback { flex-direction: column; align-items: stretch; }
}

@media (max-width: 640px) {
  .hero-actions { flex-direction: column; }
}