/* Zählerblitz / BoltMeter – website styles.
   Light palette from the app (design/DESIGN.md). Rule: yellow only for "light on". */

:root {
  --primary: #006B5F;
  --on-primary: #FFFFFF;
  --primary-container: #A0F2E1;
  --on-primary-container: #00201C;
  --secondary-container: #CCE8E1;
  --on-secondary-container: #05201C;
  --light-on: #FFE16D;
  --on-light-on: #221B00;
  --background: #F5FBF8;
  --surface-lowest: #FFFFFF;
  --surface-container: #E9EFEC;
  --surface-container-high: #E3EAE6;
  --on-surface: #171D1B;
  --on-surface-variant: #3F4946;
  --outline: #6F7976;
  --outline-variant: #BEC9C5;
  --tip: #FFF4C2;
  --on-tip: #211B00;
  --signal-tick: #8F7600;
  --lcd: #C9D3B8;
  --on-lcd: #1E2414;
  --deep: #00382F;

  --font: Roboto, "Roboto Flex", system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: "Roboto Mono", ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --r-chip: 8px;
  --r-field: 12px;
  --r-card: 16px;
  --r-section: 20px;
  --r-pill: 32px;
}

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

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

body {
  margin: 0;
  background: var(--background);
  color: var(--on-surface);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--primary); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--background) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--outline-variant);
}
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 64px; }

.brand { display: flex; align-items: center; gap: 10px; color: var(--on-surface); text-decoration: none; font-weight: 500; font-size: 20px; }
.brand img { width: 36px; height: 36px; border-radius: 30%; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a {
  color: var(--on-surface-variant); text-decoration: none; font-size: 14px; font-weight: 500;
  padding: 8px 12px; border-radius: var(--r-pill);
}
.nav a:hover { background: var(--surface-container); color: var(--on-surface); }
.nav a.lang { border: 1px solid var(--outline-variant); }
@media (max-width: 640px) { .nav .hide-sm { display: none; } }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 56px; padding: 0 28px; border-radius: var(--r-pill);
  font-size: 16px; font-weight: 600; text-decoration: none;
}
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: #005A50; }
.btn-primary svg { color: var(--light-on); }
.btn-tonal { background: var(--secondary-container); color: var(--on-secondary-container); }
.btn-tonal:hover { background: #BBDDD5; }

/* ---------- Hero ---------- */

.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; gap: 32px; } .hero { padding-top: 32px; } }

.eyebrow {
  display: inline-block; margin: 0 0 12px; padding: 4px 12px; border-radius: var(--r-chip);
  background: var(--primary-container); color: var(--on-primary-container);
  font-size: 13px; font-weight: 600; letter-spacing: .02em;
}
.hero h1 { margin: 0 0 16px; font-size: clamp(32px, 5vw, 48px); line-height: 1.12; font-weight: 500; letter-spacing: -.01em; }
.hero .lead { margin: 0 0 28px; font-size: 18px; color: var(--on-surface-variant); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.cta-note { font-size: 13px; color: var(--on-surface-variant); margin: 14px 0 0; }

/* Hero visual: LCD + signal sequence card */
.device {
  background: var(--surface-lowest); border: 1px solid var(--outline-variant);
  border-radius: 28px; padding: 20px; box-shadow: 0 8px 32px rgba(0, 56, 47, .08);
  display: flex; flex-direction: column; gap: 16px;
}
.lcd {
  background: var(--lcd); color: var(--on-lcd); border-radius: var(--r-field);
  padding: 18px 20px; font-family: var(--mono); font-weight: 600;
  display: flex; align-items: baseline; justify-content: space-between;
  box-shadow: inset 0 2px 6px rgba(30, 36, 20, .18);
}
.lcd .lcd-label { font-size: 18px; letter-spacing: .08em; }
.lcd .lcd-digits { font-size: 34px; letter-spacing: 14px; }
.lcd .cur { text-decoration: underline; text-underline-offset: 6px; }

.seq-title { display: flex; justify-content: space-between; align-items: baseline; font-size: 14px; font-weight: 500; }
.seq-title span { font-size: 12px; color: var(--on-surface-variant); font-weight: 400; }
.seq { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.seq-group { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.seq-ticks { display: flex; gap: 4px; height: 36px; align-items: flex-end; }
.tick { width: 7px; height: 36px; border-radius: 4px; background: var(--light-on); box-shadow: inset 0 0 0 1px rgba(143, 118, 0, .35); }
.tick.wake { height: 24px; background: var(--primary-container); box-shadow: none; }
.tick.none { width: 18px; height: 3px; background: var(--outline-variant); box-shadow: none; }
.seq-label { font-size: 12px; color: var(--on-surface-variant); font-family: var(--mono); font-weight: 600; }
.seq-gap { width: 1px; align-self: stretch; background: var(--outline-variant); margin: 0 2px; }

.send-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  height: 56px; border-radius: var(--r-pill); background: var(--primary); color: var(--on-primary);
  font-weight: 600;
}
.send-btn svg { color: var(--light-on); }

/* ---------- Sections ---------- */

section.block { padding: 48px 0; }
section.block.alt { background: var(--surface-lowest); border-top: 1px solid var(--outline-variant); border-bottom: 1px solid var(--outline-variant); }
h2 { margin: 0 0 12px; font-size: clamp(26px, 3.4vw, 32px); line-height: 1.2; font-weight: 500; }
.section-lead { margin: 0 0 32px; color: var(--on-surface-variant); max-width: 44em; font-size: 17px; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface-lowest); border: 1px solid var(--outline-variant);
  border-radius: var(--r-card); padding: 20px;
}
.alt .card { background: var(--background); }
.card h3 { margin: 12px 0 6px; font-size: 18px; font-weight: 500; }
.card p { margin: 0; color: var(--on-surface-variant); font-size: 15px; }
.icon {
  width: 44px; height: 44px; border-radius: var(--r-field);
  background: var(--secondary-container); color: var(--on-secondary-container);
  display: grid; place-items: center;
}
.icon.light { background: var(--light-on); color: var(--on-light-on); }
.icon svg { width: 24px; height: 24px; }

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; counter-reset: step; }
.steps li {
  counter-increment: step; position: relative;
  background: var(--surface-lowest); border: 1px solid var(--outline-variant); border-radius: var(--r-card);
  padding: 18px 20px 18px 72px; min-height: 64px;
}
.alt .steps li { background: var(--background); }
.steps li::before {
  content: counter(step); position: absolute; left: 18px; top: 16px;
  width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: var(--primary); color: var(--on-primary); font-weight: 600; font-family: var(--mono);
}
.steps strong { display: block; font-weight: 500; font-size: 17px; margin-bottom: 2px; }
.steps span { color: var(--on-surface-variant); font-size: 15px; }

.tip {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--tip); color: var(--on-tip); border-radius: var(--r-card);
  padding: 16px 18px; margin-top: 20px; font-size: 15px;
}
.tip svg { flex-shrink: 0; width: 22px; height: 22px; color: var(--signal-tick); margin-top: 1px; }

/* Meter display table */
.table-wrap { overflow-x: auto; border: 1px solid var(--outline-variant); border-radius: var(--r-card); background: var(--surface-lowest); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--surface-container-high); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { font-size: 13px; font-weight: 600; color: var(--on-surface-variant); background: var(--surface-container); }
td.code { font-family: var(--mono); font-weight: 600; color: var(--primary); white-space: nowrap; }

/* FAQ */
.faq { display: grid; gap: 10px; }
details {
  background: var(--surface-lowest); border: 1px solid var(--outline-variant); border-radius: var(--r-card);
  padding: 0 20px;
}
.alt details { background: var(--background); }
summary { cursor: pointer; list-style: none; padding: 16px 28px 16px 0; font-weight: 500; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 0; top: 12px; font-size: 22px; color: var(--primary); }
details[open] summary::after { content: "–"; }
details p { margin: 0 0 16px; color: var(--on-surface-variant); }

/* Final CTA */
.cta-band {
  background: var(--primary); color: var(--on-primary); border-radius: var(--r-section);
  padding: 32px; display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between;
}
.cta-band h2 { margin: 0 0 4px; }
.cta-band p { margin: 0; color: var(--primary-container); }
.cta-band .btn { background: var(--light-on); color: var(--on-light-on); }
.cta-band .btn:hover { background: #F5D44F; }
.cta-band .btn svg { color: var(--on-light-on); }

/* ---------- Legal pages ---------- */

.legal { padding: 40px 0 56px; }
.legal .wrap { max-width: 780px; }
.legal h1 { margin: 0 0 8px; font-size: clamp(30px, 4vw, 40px); font-weight: 500; line-height: 1.15; }
.legal .stand { margin: 0 0 32px; color: var(--on-surface-variant); font-size: 14px; }
.legal h2 { font-size: 22px; margin: 36px 0 10px; }
.legal h3 { font-size: 17px; font-weight: 500; margin: 22px 0 6px; }
.legal p, .legal li { color: var(--on-surface); }
.legal ul { padding-left: 22px; }
.legal li { margin: 4px 0; }
.summary-box {
  background: var(--primary-container); color: var(--on-primary-container);
  border-radius: var(--r-card); padding: 18px 20px;
}
.summary-box ul { margin: 8px 0 0; }
.summary-box strong { font-weight: 600; }
address { font-style: normal; }

/* Placeholder that still has to be filled in before going live. */
.todo { background: #FFDAD6; color: #410002; padding: 0 4px; border-radius: 4px; font-weight: 600; }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--outline-variant); padding: 28px 0 36px; color: var(--on-surface-variant); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.site-footer a { color: var(--on-surface-variant); }
.site-footer .disclaimer { flex-basis: 100%; margin: 0; font-size: 13px; line-height: 1.5; }