/* backup-landing — minimal, mobile-first. System fonts, no framework. */

:root {
  --bg: #ffffff;
  --bg-alt: #f4f6f8;
  --fg: #1a1d21;
  --muted: #5b6773;
  --accent: #1f7a4d;
  --accent-fg: #ffffff;
  --border: #d9dee3;
  --maxw: 44rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.1rem;
}

h1, h2 { line-height: 1.2; }
h1 { font-size: 1.7rem; margin: 0 0 0.6rem; }
h2 { font-size: 1.35rem; margin: 0 0 0.9rem; }

a { color: var(--accent); }

/* Sections */
.section { padding: 2.4rem 0; border-top: 1px solid var(--border); }
.section.alt { background: var(--bg-alt); }

/* Hero */
.hero {
  padding: 2.8rem 0 2.4rem;
  background: var(--bg-alt);
}
.hero .lead { color: var(--muted); font-size: 1.05rem; margin: 0 0 1.4rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.3rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--accent-fg); }
.btn-primary:hover { filter: brightness(0.94); }

/* Calculator */
.calc { margin-top: 0.5rem; }
fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  margin: 0 0 1.2rem;
}
legend { font-weight: 600; padding: 0 0.4rem; }

.appliance {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem 0.55rem;
  padding: 0.45rem 0;
}
.appliance label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  cursor: pointer;
}
.segment label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.45rem 0;
  cursor: pointer;
}
.appliance input[type="checkbox"],
.segment input { margin: 0; flex: none; }

.watt-field { font-size: 0.9rem; color: var(--muted); }
.watt-field input.watt {
  width: 4.5rem;
  padding: 0.25rem 0.4rem;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  text-align: right;
}
.watt-field input.watt:invalid { border-color: #b3261e; }

.hint { color: var(--muted); font-size: 0.85rem; }

.field { margin-bottom: 1.2rem; }
.field label { display: block; font-weight: 600; margin-bottom: 0.35rem; }
.field input[type="number"] {
  width: 100%;
  padding: 0.7rem 0.8rem;
  font-size: 1.05rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.field .hint { display: block; margin-top: 0.4rem; }

/* Result */
.result {
  margin-top: 1.6rem;
  padding: 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: #eef7f1;
}
.result-value { font-size: 2rem; font-weight: 700; margin: 0 0 0.5rem; }
.disclaimer { color: var(--muted); font-size: 0.9rem; margin: 0; }

/* Overload warning — station can't run the selected set at once */
.overload {
  margin-top: 1.6rem;
  padding: 1.2rem;
  border: 1px solid #d98a00;
  border-radius: 10px;
  background: #fdf4e3;
}
.overload p { margin: 0; font-size: 0.95rem; line-height: 1.5; }

/* Reasons / FAQ */
.reasons { padding-left: 1.1rem; margin: 0 0 1rem; }
.reasons li { margin-bottom: 0.5rem; }
.emph { font-weight: 600; }

.faq details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.2rem 0.9rem;
  margin-bottom: 0.7rem;
}
.faq summary { cursor: pointer; font-weight: 600; padding: 0.7rem 0; }
.faq details p { margin: 0 0 0.9rem; color: var(--muted); }

/* Pro */
.price { font-size: 1.1rem; margin: 1rem 0 0.35rem; }
.price-frame {
  margin: 0 0 1rem;
  max-width: 34rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}
.pro-reveal {
  margin-top: 1.2rem;
  padding: 1.1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}

/* Email forms */
.email-form input[type="email"] {
  width: 100%;
  padding: 0.7rem 0.8rem;
  font-size: 1.05rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.9rem;
}
.email-form .btn { width: 100%; }
.form-status { min-height: 1.2rem; margin: 0.7rem 0 0; font-size: 0.9rem; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: #b3261e; }

/* Footer */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--muted);
  font-size: 0.9rem;
}
.footer p { margin: 0.3rem 0; }
.footer .fine { font-size: 0.82rem; }

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* Larger screens: modest widening only, no design ambition */
@media (min-width: 40rem) {
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.6rem; }
  .email-form .btn { width: auto; }
}