/* ==========================================================================
   Nebenkosten-Check – Stylesheet
   Mobile-first, Light/Dark über prefers-color-scheme.
   ========================================================================== */

:root {
  /* Farbpalette (Light) – Petrol/Grün mit warmem Amber-Akzent */
  --color-bg: #f4f6f5;
  --color-surface: #ffffff;
  --color-surface-alt: #eaf1ef;
  --color-text: #1d2a29;
  --color-text-muted: #5a6b69;
  --color-primary: #0f5c5a;
  --color-primary-strong: #0a4443;
  --color-primary-contrast: #ffffff;
  --color-accent: #c98b1e;
  --color-border: #d4ddda;
  --color-green: #2e7d43;
  --color-green-bg: #e2f2e6;
  --color-yellow: #a06a00;
  --color-yellow-bg: #fdf1d8;
  --color-red: #b3261e;
  --color-red-bg: #fbe4e2;
  --color-bar-track: #e3e9e7;
  --shadow: 0 2px 10px rgba(16, 42, 41, 0.08);
  --radius: 12px;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-head: "Source Serif 4", Georgia, "Times New Roman", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #101817;
    --color-surface: #1a2423;
    --color-surface-alt: #14201f;
    --color-text: #e6edeb;
    --color-text-muted: #9db0ad;
    --color-primary: #4fb3ae;
    --color-primary-strong: #6cc7c2;
    --color-primary-contrast: #08201f;
    --color-accent: #e0a83f;
    --color-border: #2c3a38;
    --color-green: #6fce88;
    --color-green-bg: #16301d;
    --color-yellow: #e5b45b;
    --color-yellow-bg: #33290f;
    --color-red: #f2867e;
    --color-red-bg: #3a1a17;
    --color-bar-track: #253230;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: 1.7rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.25rem; margin: 0 0 1rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
h4 { font-size: 1rem; margin: 0 0 0.4rem; }

.wrap {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1rem;
}

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

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-primary);
}

.brand-icon { width: 1.8rem; height: 1.8rem; }

.brand-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
}

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

.hero { padding: 2rem 0 1rem; }

.hero-sub {
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0;
}

/* Karten ------------------------------------------------------------------ */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1rem;
  margin: 1.25rem 0;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7em;
  height: 1.7em;
  margin-right: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  font-family: var(--font-body);
  font-size: 0.85em;
  font-weight: 700;
}

.section-intro {
  color: var(--color-text-muted);
  margin-top: -0.5rem;
}

/* Formulare --------------------------------------------------------------- */

.field-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

input[type="number"],
input[type="text"],
input[type="month"],
textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  font: inherit;
  color: var(--color-text);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.positions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.position-row {
  display: grid;
  grid-template-columns: 1fr 8.5rem;
  gap: 0.5rem;
  align-items: center;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface-alt);
}

.position-label { font-size: 0.92rem; font-weight: 500; }

.position-note {
  grid-column: 1 / -1;
  font-size: 0.8rem;
  color: var(--color-red);
  margin: 0;
}

.position-avg {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.btn {
  font: inherit;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}

.btn-primary:hover:not(:disabled) { background: var(--color-primary-strong); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-ghost:hover { color: var(--color-text); border-color: var(--color-text-muted); }

.btn-small { font-size: 0.85rem; padding: 0.4rem 0.85rem; }

.link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--color-primary);
  text-decoration: underline;
  cursor: pointer;
}

/* Ergebnis ---------------------------------------------------------------- */

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.summary-tile {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.7rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.summary-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.summary-value {
  font-size: 1.15rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.saldo-negative .summary-value { color: var(--color-red); }
.saldo-positive .summary-value { color: var(--color-green); }

.overall-verdict {
  padding: 0.75rem 0.9rem;
  border-radius: 8px;
  font-weight: 500;
  border: 1px solid var(--color-border);
}

.overall-verdict.verdict-green { background: var(--color-green-bg); color: var(--color-green); }
.overall-verdict.verdict-yellow { background: var(--color-yellow-bg); color: var(--color-yellow); }
.overall-verdict.verdict-red { background: var(--color-red-bg); color: var(--color-red); }

.legend { font-size: 0.82rem; color: var(--color-text-muted); }

.dot {
  display: inline-block;
  width: 0.7em;
  height: 0.7em;
  border-radius: 50%;
  vertical-align: baseline;
}

.dot-green { background: var(--color-green); }
.dot-yellow { background: var(--color-yellow); }
.dot-red { background: var(--color-red); }

.results-list { display: grid; gap: 0.7rem; }

.result-row {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  display: grid;
  gap: 0.35rem;
}

.result-row.status-green { border-left: 5px solid var(--color-green); }
.result-row.status-yellow { border-left: 5px solid var(--color-yellow); }
.result-row.status-red { border-left: 5px solid var(--color-red); background: var(--color-red-bg); }

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.result-name { font-weight: 600; font-size: 0.95rem; }

.result-values {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.result-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}

.status-green .result-badge { background: var(--color-green-bg); color: var(--color-green); }
.status-yellow .result-badge { background: var(--color-yellow-bg); color: var(--color-yellow); }
.status-red .result-badge { background: var(--color-red); color: #fff; }

/* Balken-Visualisierung */

.bar-track {
  position: relative;
  height: 0.8rem;
  border-radius: 999px;
  background: var(--color-bar-track);
  overflow: hidden;
}

.bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 999px;
  min-width: 2px;
}

.status-green .bar-fill { background: var(--color-green); }
.status-yellow .bar-fill { background: var(--color-yellow); }
.status-red .bar-fill { background: var(--color-red); }

.bar-marker {
  position: absolute;
  top: -0.15rem;
  bottom: -0.15rem;
  width: 2px;
  background: var(--color-text-muted);
  opacity: 0.7;
}

.bar-caption {
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

/* Hinweise / Boxen -------------------------------------------------------- */

.check-hints { padding-left: 1.2rem; display: grid; gap: 0.6rem; }
.check-hints li { font-size: 0.92rem; }
.check-hints .hint-pos { font-weight: 700; }

.info-box {
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  font-size: 0.92rem;
}

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

#eingabe-fehler { color: var(--color-red); font-weight: 600; }

/* Checkliste -------------------------------------------------------------- */

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.checklist label {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  align-items: start;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface-alt);
  cursor: pointer;
  font-size: 0.92rem;
}

.checklist input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.2rem;
  accent-color: var(--color-primary);
}

.checklist em { display: block; font-style: normal; color: var(--color-text-muted); font-size: 0.82rem; }

/* Musterbrief ------------------------------------------------------------- */

.letter {
  margin-top: 1rem;
  font-family: "Courier New", ui-monospace, monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  resize: vertical;
}

/* Ad-Slot ----------------------------------------------------------------- */

.ad-slot {
  margin: 1.25rem 0;
  padding: 1rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  text-align: center;
}

.ad-slot-label {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0 0.4rem;
}

.ad-slot-text {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Disclaimer & Footer ----------------------------------------------------- */

.disclaimer-card { background: var(--color-surface-alt); font-size: 0.92rem; }

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-inner {
  padding-top: 1.1rem;
  padding-bottom: 1.4rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-nav { display: flex; gap: 1rem; }

/* Modals ------------------------------------------------------------------ */

.modal {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  max-width: min(92vw, 480px);
  width: 100%;
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.modal::backdrop { background: rgba(10, 20, 20, 0.55); }

.modal-body { padding: 1.4rem 1.3rem; }

.feature-list { padding-left: 1.2rem; }
.feature-list li { margin-bottom: 0.3rem; }

.price { font-size: 1.1rem; }

/* Größere Screens --------------------------------------------------------- */

@media (min-width: 600px) {
  h1 { font-size: 2.1rem; }
  .card { padding: 1.6rem 1.5rem; }
  .field-grid { grid-template-columns: 1fr 1fr; }
  .positions-grid { grid-template-columns: 1fr 1fr; }
  .summary-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-inner { flex-direction: row; justify-content: space-between; align-items: center; }
}

@media print {
  .site-header, .ad-slot, .actions, .site-footer { display: none; }
  .card { box-shadow: none; }
}

/* Erste-Schritte-Hilfe ---------------------------------------------------- */

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.help-btn {
  inline-size: 2rem;
  block-size: 2rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  flex: 0 0 auto;
}

.help-btn:hover,
.help-btn:focus-visible {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.tour-intro { color: var(--color-text-muted); }

.tour-steps {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.6rem;
}

.tour-steps li strong { color: var(--color-primary); }

.know-box {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
}

.know-box h3 { margin: 0 0 0.5rem; font-size: 0.95rem; }

.know-box ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
}

.know-box li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}