/* Turun Energiatodistus — tyylit */
:root {
  --blue: #133b5c;
  --blue-dark: #0c2a42;
  --green: #2e9e5b;
  --green-dark: #257f49;
  --bg: #ffffff;
  --bg-soft: #f4f7fa;
  --text: #22303c;
  --text-light: #5a6b7b;
  --border: #dde5ec;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(19, 59, 92, 0.08);
  --max: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.logo span { color: var(--green); }
.nav-links { display: flex; gap: 26px; list-style: none; align-items: center; }
.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--green-dark); }
.nav-links a.cta {
  background: var(--green);
  color: #fff;
  padding: 9px 18px;
  border-radius: var(--radius);
}
.nav-links a.cta:hover { background: var(--green-dark); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--blue);
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--bg-soft) 60%, #e8f4ec 100%);
  padding: 72px 0 64px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.7rem);
  color: var(--blue);
  line-height: 1.2;
  max-width: 760px;
  margin: 0 auto 18px;
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto 30px;
}
.btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  padding: 14px 30px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--green-dark); }
.btn.secondary {
  background: #fff;
  color: var(--blue);
  border: 2px solid var(--blue);
}
.btn.secondary:hover { background: var(--bg-soft); }
.hero .btn { margin: 0 8px 10px; }

/* ---------- Trust badges ---------- */
.badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px 36px;
  margin-top: 36px;
  font-size: 0.95rem;
  color: var(--text-light);
}
.badges div::before { content: "✓ "; color: var(--green); font-weight: 700; }

/* ---------- Sections ---------- */
section { padding: 56px 0; }
section.alt { background: var(--bg-soft); }
h2 {
  font-size: 1.7rem;
  color: var(--blue);
  margin-bottom: 18px;
  line-height: 1.25;
}
h3 { color: var(--blue); margin: 26px 0 10px; font-size: 1.2rem; }
p + p { margin-top: 14px; }
.section-intro { max-width: 720px; color: var(--text-light); margin-bottom: 32px; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 30px;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card .step-num {
  display: inline-flex;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

/* ---------- Calculator ---------- */
.calc-wrap {
  max-width: 660px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px;
}
.calc-wrap h2 { text-align: center; }
.field { margin-bottom: 22px; }
.field > label.field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--blue);
}
.field select,
.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.field select:focus, .field input:focus, .field textarea:focus {
  outline: 2px solid var(--green);
  border-color: var(--green);
}
.choice-row { display: flex; gap: 10px; flex-wrap: wrap; }
.choice-row label {
  flex: 1 1 140px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  text-align: center;
  cursor: pointer;
  font-weight: 500;
  transition: border-color 0.12s, background 0.12s;
  user-select: none;
}
.choice-row input[type="radio"] { display: none; }
.choice-row input[type="radio"]:checked + span { color: var(--blue-dark); }
.choice-row label.selected {
  border-color: var(--green);
  background: #effaf3;
}
.hint { font-size: 0.88rem; color: var(--text-light); margin-top: 6px; }

.price-box {
  background: var(--blue);
  color: #fff;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-top: 26px;
}
.price-box .amount { font-size: 2.3rem; font-weight: 700; }
.price-box .vat { font-size: 0.9rem; opacity: 0.85; }
.price-box .discount-line { color: #8fe2ae; font-size: 0.95rem; margin-top: 4px; }
.price-placeholder {
  background: var(--bg-soft);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  color: var(--text-light);
  margin-top: 26px;
  font-size: 0.95rem;
}
.notice {
  background: #fff8e6;
  border: 1px solid #f0dfa8;
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-top: 22px;
  font-size: 0.95rem;
}

#contact-section { display: none; margin-top: 30px; border-top: 1px solid var(--border); padding-top: 28px; }
#contact-section.visible { display: block; }

/* ---------- FAQ ---------- */
details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: #fff;
}
details summary {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  color: var(--blue);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details summary::after { content: "+"; font-size: 1.3rem; color: var(--green); }
details[open] summary::after { content: "–"; }
details .answer { padding: 0 20px 18px; color: var(--text); }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; margin: 20px 0; background: #fff; }
th, td { padding: 12px 14px; border: 1px solid var(--border); text-align: left; }
th { background: var(--bg-soft); color: var(--blue); }

/* ---------- Footer ---------- */
footer {
  background: var(--blue-dark);
  color: #cfdce8;
  padding: 44px 0 30px;
  margin-top: 40px;
  font-size: 0.95rem;
}
footer a { color: #9fd6b4; text-decoration: none; }
footer a:hover { text-decoration: underline; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
.footer-grid h4 { color: #fff; margin-bottom: 10px; font-size: 1rem; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 6px; }
.copyright { margin-top: 30px; font-size: 0.85rem; opacity: 0.7; text-align: center; }

/* ---------- Cookie banner ---------- */
#cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--blue-dark);
  color: #fff;
  padding: 18px 20px;
  z-index: 200;
  display: none;
}
#cookie-banner.visible { display: block; }
.cookie-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
}
.cookie-inner p { font-size: 0.9rem; max-width: 640px; }
.cookie-inner a { color: #9fd6b4; }
.cookie-buttons { display: flex; gap: 10px; }
.cookie-buttons button {
  padding: 10px 20px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
}
#cookie-accept { background: var(--green); color: #fff; }
#cookie-decline { background: transparent; color: #fff; border: 1px solid #ffffff66; }

/* ---------- Prose pages ---------- */
.prose { max-width: 760px; }
.prose ul, .prose ol { margin: 14px 0 14px 26px; }
.prose li { margin-bottom: 6px; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .grid-3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .calc-wrap { padding: 22px; }
  .hero { padding: 48px 0 40px; }
}