/* Base */
:root {
  --bg: #f7fafc;
  --surface: rgba(255, 255, 255, 0.68);
  --text: #0b1220;
  --muted: rgba(11, 18, 32, 0.72);
  --border: rgba(11, 18, 32, 0.14);
  --shadow: 0 12px 30px rgba(11, 18, 32, 0.12);
  --ring: rgba(57, 126, 255, 0.45);
  --accent: #2563eb;
  --accent-2: #06b6d4;
  --radius: 16px;
  --radius-sm: 12px;
  --container: 1100px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    Arial,
    "Noto Sans",
    "Liberation Sans",
    sans-serif;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

a {
  color: inherit;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transform: translateY(-140%);
  transition: transform 160ms ease;
  z-index: 1000;
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

/* Header + nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 250, 252, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(11, 18, 32, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.92), transparent 60%),
    linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(6, 182, 212, 0.95));
  box-shadow: 0 10px 18px rgba(37, 99, 235, 0.2);
}

.brand-text {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link {
  text-decoration: none;
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
  color: rgba(11, 18, 32, 0.84);
}

.nav-link:hover {
  background: rgba(11, 18, 32, 0.06);
}

.nav-link.is-active {
  background: rgba(37, 99, 235, 0.12);
  color: rgba(37, 99, 235, 0.98);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  padding: 0.55rem 0.7rem;
  box-shadow: 0 10px 20px rgba(11, 18, 32, 0.08);
}

.nav-toggle-lines {
  display: inline-block;
  width: 22px;
  height: 14px;
  background:
    linear-gradient(var(--text), var(--text)) 0 0 / 100% 2px no-repeat,
    linear-gradient(var(--text), var(--text)) 0 50% / 100% 2px no-repeat,
    linear-gradient(var(--text), var(--text)) 0 100% / 100% 2px no-repeat;
  opacity: 0.9;
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
  }

  .site-header.is-open .site-nav {
    display: flex;
  }

  .nav-link {
    padding: 0.75rem 0.9rem;
  }
}

/* Hero */
.hero {
  position: relative;
  padding: 4rem 0 2.8rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 10%, rgba(6, 182, 212, 0.18), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(37, 99, 235, 0.22), transparent 55%),
    radial-gradient(circle at 40% 90%, rgba(37, 99, 235, 0.14), transparent 55%),
    linear-gradient(180deg, #f7fafc 0%, #f2f7fb 60%, #f7fafc 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: -60px;
  background:
    radial-gradient(circle at 10px 10px, rgba(255, 255, 255, 0.65) 1px, transparent 2px)
      0 0 / 22px 22px,
    radial-gradient(circle at 18px 16px, rgba(255, 255, 255, 0.5) 1px, transparent 2px)
      0 0 / 28px 28px;
  opacity: 0.55;
  transform: rotate(-6deg);
  pointer-events: none;
}

.hero-inner {
  position: relative;
}

.kicker {
  display: inline-block;
  margin: 0 0 0.8rem;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(255, 255, 255, 0.62);
  color: rgba(37, 99, 235, 0.92);
  font-weight: 600;
  letter-spacing: 0.2px;
  box-shadow: 0 10px 18px rgba(11, 18, 32, 0.06);
}

h1 {
  margin: 0 0 0.85rem;
  line-height: 1.05;
  font-size: clamp(2rem, 3.5vw + 1rem, 3.1rem);
}

.lead {
  margin: 0;
  color: var(--muted);
  max-width: 62ch;
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* Page hero */
.page-hero {
  padding: 2.6rem 0 1.2rem;
  background:
    radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.18), transparent 55%),
    radial-gradient(circle at 90% 10%, rgba(6, 182, 212, 0.16), transparent 55%);
  border-bottom: 1px solid rgba(11, 18, 32, 0.06);
}

/* Sections */
.section {
  padding: 2.2rem 0 3.4rem;
}

.section-heading {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1.2rem;
}

h2 {
  margin: 0;
  font-size: 1.6rem;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.95rem;
}

.section-actions {
  margin-top: 1.2rem;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  font-weight: 650;
}

.button.primary {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.98), rgba(6, 182, 212, 0.92));
  color: #fff;
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.2);
}

.button.primary:hover {
  filter: brightness(1.02);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.86);
  border-color: rgba(11, 18, 32, 0.12);
  box-shadow: 0 12px 24px rgba(11, 18, 32, 0.1);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.96);
}

.button.ghost {
  background: transparent;
  border-color: rgba(11, 18, 32, 0.16);
  color: rgba(11, 18, 32, 0.86);
}

.button.ghost:hover {
  background: rgba(11, 18, 32, 0.05);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.4rem;
  font-weight: 650;
  color: rgba(37, 99, 235, 0.95);
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

/* Cards */
.grid {
  display: grid;
  gap: 1rem;
}

.cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 980px) {
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 650px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.card {
  position: relative;
  padding: 1rem 1rem 1.05rem;
  border-radius: var(--radius);
  border: 1px solid rgba(11, 18, 32, 0.12);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.card-topo {
  position: relative;
  height: 92px;
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid rgba(11, 18, 32, 0.08);
  margin-bottom: 0.85rem;
  background:
    radial-gradient(circle at 25% 30%, rgba(255, 255, 255, 0.75), transparent 55%),
    radial-gradient(circle at 65% 70%, rgba(255, 255, 255, 0.55), transparent 55%),
    linear-gradient(135deg, rgba(37, 99, 235, 0.22), rgba(6, 182, 212, 0.22));
  overflow: hidden;
}

.card-topo::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10px 10px, rgba(255, 255, 255, 0.5) 1px, transparent 2px)
      0 0 / 18px 18px;
  opacity: 0.25;
  pointer-events: none;
}

.topo-koli {
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.75), transparent 55%),
    linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(6, 182, 212, 0.18)),
    linear-gradient(0deg, rgba(15, 23, 42, 0.12), transparent 60%);
}

.topo-saimaa {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.75), transparent 55%),
    linear-gradient(135deg, rgba(6, 182, 212, 0.22), rgba(37, 99, 235, 0.16)),
    linear-gradient(0deg, rgba(37, 99, 235, 0.14), transparent 55%);
}

.topo-suo {
  background:
    radial-gradient(circle at 30% 35%, rgba(255, 255, 255, 0.72), transparent 55%),
    linear-gradient(135deg, rgba(34, 197, 94, 0.16), rgba(37, 99, 235, 0.16)),
    linear-gradient(0deg, rgba(15, 23, 42, 0.1), transparent 60%);
}

.topo-tiilikka {
  background:
    radial-gradient(circle at 40% 25%, rgba(255, 255, 255, 0.7), transparent 55%),
    linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(148, 163, 184, 0.18)),
    linear-gradient(0deg, rgba(15, 23, 42, 0.1), transparent 60%);
}

.topo-vaara {
  background:
    radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.72), transparent 55%),
    linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(6, 182, 212, 0.12)),
    linear-gradient(0deg, rgba(15, 23, 42, 0.16), transparent 60%);
}

.card-title {
  margin: 0 0 0.2rem;
  font-size: 1.25rem;
}

.meta {
  margin: 0 0 0.65rem;
  color: rgba(11, 18, 32, 0.68);
  font-weight: 600;
  font-size: 0.95rem;
}

.details-toggle {
  margin-top: 0.65rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(11, 18, 32, 0.16);
  background: rgba(255, 255, 255, 0.74);
  font-weight: 650;
  cursor: pointer;
}

.details-toggle:hover {
  background: rgba(255, 255, 255, 0.9);
}

.details {
  margin-top: 0.75rem;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(37, 99, 235, 0.06);
}

/* Footer */
.site-footer {
  padding: 1.6rem 0 2.4rem;
  border-top: 1px solid rgba(11, 18, 32, 0.08);
  background: rgba(247, 250, 252, 0.72);
}

.footer-inner {
  display: grid;
  gap: 0.4rem;
}