*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

/* ===== THEMES ===== */
:root{
  --bg:#f8fafc; --bg2:#f1f5f9; --surface:#fff;
  --text:#0f172a; --text2:#475569; --text3:#94a3b8;
  --accent-sf:#2563eb; --accent-oak:#0d9488;
  --border:#e2e8f0; --border-light:#f1f5f9;
  --nav-bg:rgba(255,255,255,.85);
  --hero-glow:radial-gradient(ellipse 700px 400px at 50% -60%,rgba(37,99,235,.07),transparent),
              radial-gradient(ellipse 500px 300px at 80% 20%,rgba(13,148,136,.05),transparent);
  --card-shadow:0 1px 3px rgba(0,0,0,.04),0 4px 12px rgba(0,0,0,.04);
  --card-hover-shadow:0 4px 16px rgba(0,0,0,.06),0 12px 40px rgba(0,0,0,.05);
  --mock-bg:#f8fafc; --mock-border:#e2e8f0;
  --btn-text:#fff;
}
[data-theme=dark]{
  --bg:#0f172a; --bg2:#1e293b; --surface:#1e293b;
  --text:#f1f5f9; --text2:#94a3b8; --text3:#64748b;
  --accent-sf:#60a5fa; --accent-oak:#2dd4bf;
  --border:#334155; --border-light:#1e293b;
  --nav-bg:rgba(15,23,42,.85);
  --hero-glow:radial-gradient(ellipse 700px 400px at 50% -60%,rgba(96,165,250,.12),transparent),
              radial-gradient(ellipse 500px 300px at 80% 20%,rgba(45,212,191,.08),transparent);
  --card-shadow:0 1px 2px rgba(0,0,0,.2),0 4px 12px rgba(0,0,0,.2);
  --card-hover-shadow:0 4px 16px rgba(0,0,0,.3),0 12px 40px rgba(0,0,0,.25);
  --mock-bg:#0f172a; --mock-border:#334155;
  --btn-text:#02121a;
}

body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.55;
  overflow-x:hidden;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  transition:background .3s,color .3s;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:800;letter-spacing:-0.02em;line-height:1.05}
p{margin:0}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- theme toggle ---------- */
.theme-btn{
  background:none;border:2px solid var(--border);border-radius:999px;
  width:38px;height:38px;display:grid;place-items:center;
  cursor:pointer;color:var(--text2);font-size:17px;
  transition:background .2s,color .2s,border-color .2s;
  line-height:1;padding:0;
}
.theme-btn:hover{background:var(--bg2);color:var(--text);border-color:var(--text3)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:var(--nav-bg);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-0.01em;flex-shrink:0}
.brand svg{width:24px;height:24px}
.brand span{color:var(--text)}
.nav-links{display:flex;align-items:center;gap:20px;font-size:14px;color:var(--text2)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--accent-sf)}
.nav-cta{
  padding:8px 14px;border:1px solid var(--border);border-radius:999px;
  background:var(--surface);color:var(--text);font-weight:600;
}
.nav-cta:hover{background:var(--accent-sf);color:#fff;border-color:var(--accent-sf)}
.nav-right{display:flex;align-items:center;gap:12px}
@media(max-width:640px){.nav-links a:not(.nav-cta){display:none}}

/* ---------- hero ---------- */
.hero{padding:80px 0 40px;position:relative;background:var(--hero-glow);transition:background .3s}
.eyebrow{
  display:inline-block;font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent-sf);font-weight:700;margin-bottom:18px;
}
.hero-title{font-size:clamp(36px,6vw,70px);max-width:16ch;margin-bottom:18px}
.gradient-text{
  background:linear-gradient(100deg,var(--accent-sf),var(--accent-oak));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{max-width:60ch;color:var(--text2);font-size:clamp(15px,1.5vw,18px);margin-bottom:40px}

/* ---------- city cards ---------- */
.city-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:800px){.city-cards{grid-template-columns:1fr}}
.city-card{
  position:relative;padding:24px;border-radius:18px;overflow:hidden;
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--card-shadow);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s,border-color .3s;
  display:block;color:inherit;
}
.city-card:hover{transform:translateY(-4px);box-shadow:var(--card-hover-shadow);border-color:var(--accent-sf)}
.city-oak:hover{border-color:var(--accent-oak)}
.city-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.city-badge{
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;
  color:var(--accent-sf);
}
.city-oak .city-badge{color:var(--accent-oak)}
.city-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-sf)}
.city-oak .city-dot{background:var(--accent-oak)}
.city-title{font-size:clamp(20px,2.2vw,26px);margin-bottom:16px}
.search-mock{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-radius:10px;
  background:var(--bg);border:1px solid var(--border);
  color:var(--text3);font-size:13px;margin-bottom:14px;min-height:44px;
}
.search-mock svg{flex-shrink:0;color:var(--accent-sf)}
.city-oak .search-mock svg{color:var(--accent-oak)}
.typing{color:var(--text);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.caret{width:2px;height:15px;background:var(--accent-sf);animation:blink 1s steps(1) infinite}
.city-oak .caret{background:var(--accent-oak)}
@keyframes blink{50%{opacity:0}}
.city-cta{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 16px;border-radius:10px;
  background:var(--accent-sf);color:var(--btn-text);font-weight:700;font-size:14px;
  transition:box-shadow .25s;
}
.city-oak .city-cta{background:var(--accent-oak)}
.city-card:hover .city-cta{box-shadow:0 6px 20px -8px var(--accent-sf)}
.city-oak:hover .city-cta{box-shadow:0 6px 20px -8px var(--accent-oak)}
.city-card:hover .arrow{transform:translateX(4px)}
.arrow{display:inline-block;transition:transform .25s}
.city-stat{margin-top:18px;display:flex;align-items:baseline;gap:8px;color:var(--text3);font-size:12px}
.city-stat strong{font-size:20px;color:var(--text);font-weight:800;font-variant-numeric:tabular-nums}

/* ---------- stats ---------- */
.stats{padding:70px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:800px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat{
  padding:24px 20px;border-radius:14px;
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--card-shadow);
  text-align:left;transition:transform .25s,box-shadow .25s;
}
.stat:hover{transform:translateY(-3px);box-shadow:var(--card-hover-shadow)}
.stat-num{
  font-size:clamp(30px,3.6vw,44px);font-weight:900;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;color:var(--accent-sf);
}
.stat-num.warn{color:#dc2626}
.stat-label{margin-top:6px;color:var(--text2);font-size:13px;font-weight:500}

/* ---------- features ---------- */
.features{padding:70px 0}
.section-head{max-width:640px;margin-bottom:44px}
.section-head h2{font-size:clamp(28px,4vw,44px);margin:12px 0}
.section-head p{color:var(--text2);font-size:15px}
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
@media(max-width:800px){.feature-grid{grid-template-columns:1fr}}
.feature{
  padding:24px;border-radius:16px;position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--card-shadow);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.feature:hover{transform:translateY(-4px);box-shadow:var(--card-hover-shadow);border-color:var(--accent-sf)}
.feature-icon{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--accent-sf) 10%,transparent);
  color:var(--accent-sf);margin-bottom:14px;
}
.feature h3{font-size:20px;margin-bottom:6px}
.feature p{color:var(--text2);font-size:14px;margin-bottom:18px;line-height:1.5}

/* mock widgets */
.scorecard-mock,.compare-mock,.tl-mock,.chart-mock{
  padding:14px;border-radius:10px;background:var(--mock-bg);border:1px solid var(--mock-border);
}
.mock-row{display:flex;justify-content:space-between;font-size:13px;color:var(--text2);padding:5px 0}
.mock-row b{color:var(--text);font-weight:700}
.mock-row b.ok{color:#16a34a}
.mock-row b.bad{color:#dc2626}
.mock-bar{height:6px;border-radius:3px;background:var(--border);margin-top:8px;overflow:hidden}
.mock-bar div{height:100%;background:linear-gradient(90deg,var(--accent-sf),var(--accent-oak));border-radius:3px}
.cmp{display:grid;grid-template-columns:100px 1fr;align-items:center;gap:10px;padding:6px 0;font-size:13px;color:var(--text2)}
.cbar{height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.cbar i{display:block;height:100%;background:var(--text3);border-radius:3px;transition:width 1s ease}
.chart-mock{height:120px;display:flex;align-items:flex-end;gap:5px;padding:12px}
.chart-mock .bar{flex:1;display:flex;flex-direction:column;justify-content:flex-end;gap:2px;border-radius:3px;overflow:hidden;min-height:18px}
.chart-mock .bar span{display:block;width:100%}
.chart-mock .bar .g{background:#16a34a}
.chart-mock .bar .r{background:#dc2626}
.chart-mock .bar .n{background:#94a3b8}
.tl-mock{display:flex;flex-direction:column;gap:8px;font-size:13px}
.tl-row{display:grid;grid-template-columns:14px 1fr auto;align-items:center;gap:10px;color:var(--text2)}
.tl-row b{font-weight:600;color:var(--text)}
.tl-row span{color:var(--text3);font-size:12px}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.dot.ok{background:#16a34a}
.dot.bad{background:#dc2626}
.dot.warn{background:#d97706}

/* ---------- sources ---------- */
.sources{padding:50px 0 30px}
.src-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:800px){.src-grid{grid-template-columns:repeat(2,1fr)}}
.src{
  padding:18px;border-radius:12px;
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--card-shadow);
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.src:hover{border-color:var(--accent-sf);transform:translateY(-2px);box-shadow:var(--card-hover-shadow)}
.src b{display:block;font-size:14px;margin-bottom:3px}
.src span{color:var(--text2);font-size:12px}

/* ---------- cta ---------- */
.cta{padding:70px 0}
.cta-inner{
  padding:50px 36px;border-radius:22px;text-align:center;
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--card-shadow);
}
.cta h2{font-size:clamp(28px,3.6vw,40px);margin-bottom:10px}
.cta p{color:var(--text2);margin-bottom:24px}
.cta-buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border-radius:12px;font-weight:700;font-size:14px;
  transition:transform .2s,box-shadow .2s;
  min-height:48px;
}
.btn:hover{transform:translateY(-2px)}
.btn:hover .arrow{transform:translateX(3px)}
.btn-sf{background:var(--accent-sf);color:var(--btn-text);box-shadow:0 4px 14px -6px var(--accent-sf)}
.btn-sf:hover{box-shadow:0 8px 24px -6px var(--accent-sf)}
.btn-oak{background:var(--accent-oak);color:var(--btn-text);box-shadow:0 4px 14px -6px var(--accent-oak)}
.btn-oak:hover{box-shadow:0 8px 24px -6px var(--accent-oak)}

/* ---------- footer ---------- */
.footer{padding:36px 0 50px;border-top:1px solid var(--border);margin-top:30px}
.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.mute{color:var(--text3);font-size:13px;margin-top:6px}
.foot-links{display:flex;gap:20px;font-size:14px;color:var(--text2)}
.foot-links a:hover{color:var(--accent-sf)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}