/* ═══════════════════════════════════════════════════════════════
   StageAID Renditekalkulator – Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS-Variablen ─────────────────────────────────────────── */
:root {
  --color-primary:       #1a3a5c;
  --color-primary-light: #274f7a;
  --color-primary-dark:  #112540;
  --color-accent:        #d4880a;
  --color-accent-light:  #f5a623;
  --color-success:       #27ae60;
  --color-warning:       #e67e22;
  --color-danger:        #c0392b;
  --color-info:          #2980b9;

  --color-bg:            #f0f3f7;
  --color-card:          #ffffff;
  --color-border:        #d1d9e2;
  --color-border-light:  #e8edf3;
  --color-text:          #1e2d3d;
  --color-text-muted:    #5a7290;
  --color-text-light:    #8fa5bf;

  --color-green-bg:      #e8f5ed;
  --color-green-border:  #a8d5b5;
  --color-yellow-bg:     #fef9e7;
  --color-yellow-border: #f5d77a;
  --color-red-bg:        #fdf2f2;
  --color-red-border:    #f0a8a8;

  --font-main:    'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:    'Consolas', 'Courier New', monospace;

  --radius-sm:    4px;
  --radius-md:    8px;
  --radius-lg:    12px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:    0 3px 10px rgba(0,0,0,0.10);
  --shadow-lg:    0 8px 24px rgba(0,0,0,0.12);

  --spacing-xs:   4px;
  --spacing-sm:   8px;
  --spacing-md:   16px;
  --spacing-lg:   24px;
  --spacing-xl:   40px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-main);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
  min-height: 100vh;
}
a { color: var(--color-primary); }
img { max-width: 100%; }

/* ── Header ────────────────────────────────────────────────── */
.app-header {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  color: #fff;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header__logo {
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.12);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-accent-light);
  letter-spacing: -1px;
  flex-shrink: 0;
}
.app-header__titles { flex: 1; }
.app-header__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.app-header__subtitle {
  font-size: 0.8rem;
  opacity: 0.75;
  font-style: italic;
}
.app-header__actions { display: flex; gap: var(--spacing-sm); }

/* ── Navigation Tabs ────────────────────────────────────────── */
.tab-nav {
  background: var(--color-primary-dark);
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  border-bottom: 3px solid var(--color-accent);
}
.tab-nav::-webkit-scrollbar { display: none; }
.tab-btn {
  padding: 11px 18px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.65);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  margin-bottom: -3px;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.tab-btn:hover { color: #fff; background: rgba(255,255,255,0.08); }
.tab-btn.active {
  color: var(--color-accent-light);
  border-bottom-color: var(--color-accent-light);
  background: rgba(255,255,255,0.05);
}

/* ── Layout ─────────────────────────────────────────────────── */
.app-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  margin-bottom: var(--spacing-lg);
  overflow: hidden;
}
.card-header {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  padding: 12px var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}
.card-header h2 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
}
.card-header .card-icon { font-size: 1.1rem; opacity: 0.85; }
.card-body { padding: var(--spacing-lg); }

/* ── Grid ───────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--spacing-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}

/* ── Formular-Elemente ──────────────────────────────────────── */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: var(--spacing-md);
}
.field-group:last-child { margin-bottom: 0; }
label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
input[type="text"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 8px 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-family: var(--font-main);
  color: var(--color-text);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
}
input[type="number"] { font-family: var(--font-mono); }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.12);
}
input.error, select.error { border-color: var(--color-danger); }
.field-error {
  font-size: 0.78rem;
  color: var(--color-danger);
  display: none;
}
.field-error.visible { display: block; }
.field-hint {
  font-size: 0.78rem;
  color: var(--color-text-light);
}
.unit-suffix {
  display: flex;
  align-items: center;
  gap: 0;
}
.unit-suffix input { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.unit-suffix .suffix {
  background: var(--color-border-light);
  border: 1px solid var(--color-border);
  border-left: none;
  padding: 8px 10px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  white-space: nowrap;
  line-height: 1.3;
}

/* ── Tooltip ────────────────────────────────────────────────── */
.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-text-light);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  cursor: help;
  position: relative;
}
.tooltip-icon::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #1a2a3a;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 400;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: pre-wrap;
  max-width: 260px;
  min-width: 180px;
  text-align: left;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 200;
  box-shadow: var(--shadow-md);
  line-height: 1.4;
}
.tooltip-icon:hover::after { opacity: 1; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-light); }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-light); }
.btn-success { background: var(--color-success); color: #fff; }
.btn-success:hover { background: #2ecc71; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #e74c3c; }
.btn-outline {
  background: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text-muted);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-sm { padding: 5px 10px; font-size: 0.8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

/* ── Ergebnis-Bereich ───────────────────────────────────────── */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}
.result-tile {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.result-tile.tile-green { border-top: 4px solid var(--color-success); }
.result-tile.tile-yellow { border-top: 4px solid var(--color-warning); }
.result-tile.tile-red { border-top: 4px solid var(--color-danger); }
.result-tile.tile-blue { border-top: 4px solid var(--color-info); }
.result-tile__label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.result-tile__value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-text);
  font-family: var(--font-mono);
  line-height: 1.15;
}
.result-tile__sub {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 3px;
}
.result-tile__value.positive { color: var(--color-success); }
.result-tile__value.negative { color: var(--color-danger); }

/* ── Ampel ──────────────────────────────────────────────────── */
.ampel-box {
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border-left: 6px solid;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}
.ampel-box.gruen {
  background: var(--color-green-bg);
  border-color: var(--color-success);
}
.ampel-box.gelb {
  background: var(--color-yellow-bg);
  border-color: var(--color-warning);
}
.ampel-box.rot {
  background: var(--color-red-bg);
  border-color: var(--color-danger);
}
.ampel-box__icon { font-size: 1.6rem; flex-shrink: 0; }
.ampel-box__title { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.ampel-box__msg { font-size: 0.875rem; line-height: 1.5; }
.ampel-box__list { margin: 6px 0 0 0; padding-left: 18px; font-size: 0.875rem; }
.ampel-box__list li { margin-bottom: 2px; }

/* ── Kostenaufstellung ──────────────────────────────────────── */
.kosten-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.kosten-table th, .kosten-table td {
  padding: 7px 10px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}
.kosten-table th {
  background: var(--color-bg);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.kosten-table td:last-child { text-align: right; font-family: var(--font-mono); font-weight: 600; }
.kosten-table .total-row td {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  border-bottom: none;
}
.kosten-table .subtotal-row td {
  background: var(--color-bg);
  font-weight: 700;
}

/* ── Szenarien ──────────────────────────────────────────────── */
.szenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}
@media (max-width: 768px) { .szenario-grid { grid-template-columns: 1fr; } }
.szenario-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.szenario-card.vorsichtig { border-color: var(--color-warning); }
.szenario-card.realistisch { border-color: var(--color-success); }
.szenario-card.optimistisch { border-color: var(--color-info); }
.szenario-card__head {
  padding: 10px var(--spacing-md);
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
}
.szenario-card.vorsichtig .szenario-card__head { background: var(--color-warning); }
.szenario-card.realistisch .szenario-card__head { background: var(--color-success); }
.szenario-card.optimistisch .szenario-card__head { background: var(--color-info); }
.szenario-card__body { padding: var(--spacing-md); }
.szenario-row { display: flex; justify-content: space-between; padding: 4px 0; font-size: 0.85rem; border-bottom: 1px solid var(--color-border-light); }
.szenario-row:last-child { border-bottom: none; font-weight: 700; }
.szenario-row__label { color: var(--color-text-muted); }
.szenario-row__value { font-family: var(--font-mono); }

/* ── Sensitivität ───────────────────────────────────────────── */
.sensitiv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.sensitiv-table th, .sensitiv-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border-light);
  text-align: right;
}
.sensitiv-table th:first-child, .sensitiv-table td:first-child { text-align: left; }
.sensitiv-table th { background: var(--color-bg); font-size: 0.78rem; color: var(--color-text-muted); text-transform: uppercase; }
.sensitiv-table .pos { color: var(--color-success); font-weight: 600; }
.sensitiv-table .neg { color: var(--color-danger); font-weight: 600; }

/* ── Geräteliste ────────────────────────────────────────────── */
.geraete-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.geraete-table th, .geraete-table td {
  padding: 7px 8px;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: middle;
}
.geraete-table th { background: var(--color-bg); text-align: left; font-size: 0.78rem; color: var(--color-text-muted); }
.geraete-table td input { padding: 5px 7px; font-size: 0.85rem; }
.geraete-table .sum-row td { background: var(--color-primary); color: #fff; font-weight: 700; }

/* ── Projekte / Speichern ───────────────────────────────────── */
.projekt-list { display: flex; flex-direction: column; gap: var(--spacing-sm); }
.projekt-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px var(--spacing-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}
.projekt-item__name { flex: 1; font-weight: 600; }
.projekt-item__date { color: var(--color-text-light); font-size: 0.78rem; }

/* ── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 500;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}
.modal-overlay.open { display: flex; }
.modal {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  padding: var(--spacing-lg);
}
.modal h3 { margin-bottom: var(--spacing-md); }
.modal-actions { display: flex; gap: var(--spacing-sm); justify-content: flex-end; margin-top: var(--spacing-lg); }

/* ── Toggle Gruppe ──────────────────────────────────────────── */
.toggle-group { display: flex; gap: 0; border: 1px solid var(--color-border); border-radius: var(--radius-sm); overflow: hidden; }
.toggle-btn {
  flex: 1;
  padding: 7px 12px;
  background: #fff;
  border: none;
  font-size: 0.85rem;
  font-family: var(--font-main);
  cursor: pointer;
  color: var(--color-text-muted);
  font-weight: 600;
  transition: background 0.1s, color 0.1s;
}
.toggle-btn.active { background: var(--color-primary); color: #fff; }
.toggle-btn + .toggle-btn { border-left: 1px solid var(--color-border); }

/* ── Info-Box ───────────────────────────────────────────────── */
.info-box {
  background: #eef4fb;
  border: 1px solid #b8d0eb;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-size: 0.85rem;
  margin-top: var(--spacing-md);
  color: #1a3a5c;
}
.info-box strong { display: block; margin-bottom: 4px; }

/* ── Disclaimer ─────────────────────────────────────────────── */
.disclaimer {
  background: #fff8e8;
  border: 1px solid #f5d77a;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-size: 0.8rem;
  color: #6b4c00;
  margin-top: var(--spacing-lg);
  line-height: 1.5;
}
.disclaimer strong { color: #7a5800; }

/* ── Datenschutz-Hinweis ────────────────────────────────────── */
.privacy-note {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--color-text-light);
  padding: var(--spacing-sm) var(--spacing-md);
  background: #f7fafd;
  border-top: 1px solid var(--color-border-light);
}

/* ── Footer ─────────────────────────────────────────────────── */
.app-footer {
  text-align: center;
  padding: var(--spacing-lg);
  font-size: 0.78rem;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border-light);
}

/* ── Trennlinie ─────────────────────────────────────────────── */
.section-sep { border: none; border-top: 1px solid var(--color-border-light); margin: var(--spacing-lg) 0; }
.section-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-border-light);
}

/* ── Loader / Badge ─────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-green { background: var(--color-green-bg); color: var(--color-success); }
.badge-yellow { background: var(--color-yellow-bg); color: var(--color-warning); }
.badge-red { background: var(--color-red-bg); color: var(--color-danger); }

/* ── Test-Output ────────────────────────────────────────────── */
.test-result { font-family: var(--font-mono); font-size: 0.82rem; }
.test-pass { color: var(--color-success); }
.test-fail { color: var(--color-danger); font-weight: 700; }
.test-summary { padding: var(--spacing-md); font-weight: 700; margin-bottom: var(--spacing-sm); }

/* ── KvZ Vergleich ──────────────────────────────────────────── */
.kvz-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}
@media (max-width: 600px) { .kvz-compare { grid-template-columns: 1fr; } }
.kvz-tile {
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
}
.kvz-tile.kauf { background: #e8f5ed; border: 2px solid var(--color-success); }
.kvz-tile.miete { background: #eef4fb; border: 2px solid var(--color-info); }
.kvz-tile.winner { box-shadow: 0 0 0 3px var(--color-accent); }
.kvz-tile__label { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 4px; font-weight: 700; text-transform: uppercase; }
.kvz-tile__value { font-size: 1.8rem; font-weight: 800; font-family: var(--font-mono); }
.kvz-winner-badge { display: block; margin-top: 8px; font-size: 0.8rem; font-weight: 700; color: var(--color-accent); }

/* ── Druckansicht ───────────────────────────────────────────── */
@media print {
  * { -webkit-print-color-adjust: exact !important; print-color-adjust: exact !important; }
  .app-header { position: static; box-shadow: none; }
  .tab-nav, .app-header__actions, .btn, .no-print { display: none !important; }
  .tab-panel { display: block !important; }
  .tab-panel:not(.active) { display: none !important; }
  #tab-print { display: block !important; }
  body { background: #fff; font-size: 11pt; }
  .card { box-shadow: none; border: 1px solid #ccc; break-inside: avoid; }
  .card-header { background: #1a3a5c !important; color: #fff !important; }
  .result-tile { border: 1px solid #ccc; }
  .ampel-box { border: 1px solid #ccc; }
  @page { margin: 15mm; }
}

/* ── Fokuszustände (Barrierefreiheit) ───────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ── Hilfeklassen ───────────────────────────────────────────── */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.font-mono { font-family: var(--font-mono); }
.fw-bold { font-weight: 700; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.gap-sm { gap: var(--spacing-sm); }
.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }
.hidden { display: none !important; }