:root{
  --bg:#f8fafc; --bg-alt:#e2e8f0; --panel:#ffffff;
  --txt:#0f172a; --txt-mut:#64748b; --border:#cbd5e1;
  --accent:#2563eb; --accent2:#06b6d4;
  --radius:18px;
  --sh:0 10px 30px -10px rgba(0,0,0,.1);
}
[data-theme="dark"]{
  --bg:#0b1120; --bg-alt:#0f172a; --panel:#1e293b;
  --txt:#f1f5f9; --txt-mut:#94a3b8; --border:#334155;
  --accent:#3b82f6; --accent2:#22d3ee;
  --sh:0 10px 30px -10px rgba(0,0,0,.5);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg); color:var(--txt);
  min-height:100vh; transition:background .3s,color .3s;
}
a{text-decoration:none;color:var(--accent);transition:opacity .2s}
a:hover{opacity:.8}

/* ШАПКА */
header{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  display:flex; align-items:center; justify-content:space-between;
  height:70px; padding:0 32px;
  background:var(--panel); border-bottom:1px solid var(--border);
  box-shadow:0 4px 20px -10px rgba(0,0,0,.3);
}
.logo{
  font-size:20px; font-weight:800; color:var(--txt);
  text-decoration:none; letter-spacing:-.5px;
  display:flex; align-items:center; gap:10px;
}
.logo::before {
  content:''; display:block; width:12px; height:12px; border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 0 10px var(--accent);
}
nav{display:flex; gap:4px; align-items:center;}
nav a{
  color:var(--txt-mut); padding:8px 14px; border-radius:8px;
  font-size:14px; font-weight:500; white-space:nowrap; transition:.2s;
}
nav a:hover, nav a.active{background:var(--bg-alt); color:var(--txt)}
.theme-btn{
  width:36px; height:36px; margin-left:8px;
  background:transparent; border:1px solid var(--border); color:var(--txt);
  border-radius:8px; cursor:pointer; font-size:16px;
  display:flex; align-items:center; justify-content:center; transition:.2s;
}
.theme-btn:hover{background:var(--bg-alt); border-color:var(--accent)}

/* ОСНОВНОЙ КОНТЕНТ */
main{
  max-width:1100px; margin:0 auto;
  margin-top:70px; /* Отступ под фиксированную шапку */
  padding:48px 24px; width:100%;
}
h1{font-size:clamp(32px,5vw,56px); font-weight:800; letter-spacing:-1.5px; line-height:1.1; margin-bottom:16px}
h2{font-size:28px; font-weight:700; margin-bottom:16px; letter-spacing:-.5px}
h3{font-size:20px; font-weight:600; margin-bottom:10px}
p.lead{font-size:18px; color:var(--txt-mut); max-width:700px; line-height:1.6; margin-bottom:32px}
.hero{padding:40px 0 20px; text-align:center}
.hero h1{
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
.btn{
  display:inline-block; background:var(--accent); color:#fff;
  padding:14px 28px; border-radius:12px; font-weight:600; font-size:16px;
  border:none; cursor:pointer; transition:transform .1s,box-shadow .2s;
  box-shadow:0 4px 14px -4px var(--accent);
}
.btn:hover{transform:translateY(-2px); box-shadow:0 8px 20px -4px var(--accent); color:#fff}
.btn.ghost{background:transparent; color:var(--txt); border:1px solid var(--border); box-shadow:none}
.btn.ghost:hover{background:var(--bg-alt); border-color:var(--accent)}

/* СЕТКИ И КАРТОЧКИ */
.grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:24px; margin-top:32px}
.card{
  background:var(--panel); border:1px solid var(--border); border-radius:var(--radius);
  padding:28px; box-shadow:var(--sh); transition:transform .25s,border-color .25s;
  display:flex; flex-direction:column; color:var(--txt);
}
.card:hover{transform:translateY(-5px); border-color:var(--accent)}
.card .icon{font-size:32px; margin-bottom:16px}
.card p{color:var(--txt-mut); line-height:1.6; font-size:15px; flex:1}
.card .more{margin-top:16px; font-weight:600; font-size:14px; color:var(--accent)}

/* СТАТИСТИКА */
.stats{display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:20px; margin-top:40px}
.stat{text-align:center; padding:24px; background:var(--panel); border-radius:var(--radius); border:1px solid var(--border)}
.stat b{display:block; font-size:36px; color:var(--accent); margin-bottom:8px; letter-spacing:-1px}
.stat span{color:var(--txt-mut); font-size:14px}

/* СТРАНИЦЫ ГОРОДОВ */
.city-hero{
  height:300px; border-radius:var(--radius); margin-bottom:32px;
  display:flex; align-items:flex-end; padding:32px;
  position:relative; overflow:hidden;
}
.city-hero::after{
  content:''; position:absolute; inset:0;
  background:linear-gradient(to top,rgba(0,0,0,.7),transparent);
}
.city-hero h1{color:#fff; position:relative; z-index:1; margin:0; font-size:42px; text-shadow:0 2px 10px rgba(0,0,0,.5)}
.bg-helsinki{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 50%,#06b6d4 100%)}
.bg-turku{background:linear-gradient(135deg,#1e1b4b 0%,#4338ca 50%,#ec4899 100%)}
.bg-tampere{background:linear-gradient(135deg,#064e3b 0%,#0f766e 50%,#06b6d4 100%)}
.bg-helsinki::before, .bg-turku::before, .bg-tampere::before{
  position:absolute; right:10%; bottom:10%;
  font-size:120px; opacity:.15; filter:blur(2px);
}
.bg-helsinki::before{content:'🏛'}
.bg-turku::before{content:'⚓'}
.bg-tampere::before{content:'🏭'}

.info-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:16px; margin:24px 0}
.info-card{background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:20px}
.info-card b{display:block; font-size:24px; color:var(--accent); margin-bottom:4px}
.info-card span{color:var(--txt-mut); font-size:14px}

/* ПОГОДА */
.weather-widget{background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); padding:32px; margin-top:32px; box-shadow:var(--sh)}
.weather-header{display:flex; justify-content:space-between; align-items:center; margin-bottom:24px}
.weather-temp{font-size:48px; font-weight:800; letter-spacing:-2px}
.weather-meta{display:flex; gap:16px; color:var(--txt-mut); font-size:15px}

footer{text-align:center; padding:32px; color:var(--txt-mut); font-size:14px; border-top:1px solid var(--border); margin-top:60px}

@media(max-width:720px){
  header{padding:0 16px; flex-wrap:wrap; height:auto; min-height:70px; padding-top:10px; padding-bottom:10px}
  nav{width:100%; justify-content:flex-start; flex-wrap:nowrap; overflow-x:auto; padding-bottom:4px; margin-top:6px}
  nav a{font-size:13px; padding:6px 10px}
  main{margin-top:120px; padding:24px 16px}
  .hero{padding:20px 0}
  .city-hero{height:200px}
  .city-hero h1{font-size:28px}
}