/* handelskalkulator.de - Stylesheet
   Mobile-first, single file, custom properties for theming.
   Variante D: Neutral-Grau + Orange */

:root {
  --color-primary: #f97316;
  --color-primary-dark: #ea580c;
  --color-primary-light: #fed7aa;

  --color-success-bg: #fef3c7;
  --color-success-border: #fcd34d;
  --color-success-text: #713f12;

  --color-text: #171717;
  --color-text-muted: #525252;
  --color-text-faint: #a3a3a3;
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-border: #e5e5e5;
  --color-input-border: #d4d4d4;
  --color-error: #dc2626;
  --color-footer-bg: #171717;
  --color-footer-text: #a3a3a3;

  --r-input: 4px;
  --r-card: 6px;
  --r-container: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); text-decoration: underline; }
h1, h2, h3 { font-weight: 700; color: var(--color-text); margin: 0 0 .5em; line-height: 1.25; }
h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
p  { margin: 0 0 1em; }

/* Layout */
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* Top-Bar */
.topbar {
  background: var(--color-text-muted);
  color: #fff;
  padding: 10px 0;
}
.topbar-inner { display: flex; align-items: center; gap: 14px; }
.topbar .brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; color: #fff; }
.topbar .brand:hover { color: #fff; text-decoration: none; }
.topbar nav { margin-left: auto; display: flex; gap: 14px; }
.topbar nav a { color: #fff; font-size: 14px; }
.topbar nav a:hover { color: var(--color-primary-light); text-decoration: none; }

/* Ad Slots */
.ad-slot {
  background: #fffbe6;
  border: 2px dashed #facc15;
  text-align: center;
  color: #854d0e;
  font-weight: 600;
  font-size: 12px;
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ad-slot[data-size="728x90"]  { min-height: 96px; }
.ad-slot[data-size="300x250"] { min-height: 250px; border-radius: var(--r-card); }
.ad-slot[data-size="728x90"]:not(.sidebar) { margin: 14px 0; }

/* Main grid */
.main { padding: 24px 0; }
.main h1 { margin-bottom: 8px; }
.intro { color: var(--color-text-muted); max-width: 760px; margin-bottom: 18px; }

.grid { display: grid; gap: 18px; grid-template-columns: 1fr; }
@media (min-width: 900px) {
  .grid { grid-template-columns: 1fr 300px; }
}

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--color-border); margin-bottom: 18px; flex-wrap: wrap; }
.tab {
  padding: 10px 18px;
  background: #fff;
  color: var(--color-text-muted);
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--r-card) var(--r-card) 0 0;
  margin-left: -1px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
}
.tab[aria-selected="true"] {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.tab:focus-visible { outline: 2px solid var(--color-primary-dark); outline-offset: 2px; }

/* Card */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-container);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* Examples */
.examples {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--r-card);
  padding: 12px 14px;
  margin-bottom: 14px;
}
.examples .label { font-size: 11px; font-weight: 600; color: var(--color-text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .04em; }
.examples .row { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-example {
  background: #fff;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  padding: 5px 10px;
  border-radius: var(--r-input);
  font: 600 12px var(--font-sans);
  cursor: pointer;
}
.btn-example:hover { background: var(--color-primary); color: #fff; }

/* Form */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 12px; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }
.field label { display: block; font: 600 11px var(--font-sans); color: var(--color-text-muted); margin-bottom: 3px; }
.field .input-wrap { display: flex; }
.field input[type="number"] {
  flex: 1;
  border: 1px solid var(--color-input-border);
  border-right: 0;
  padding: 8px 10px;
  border-radius: var(--r-input) 0 0 var(--r-input);
  font: 13px var(--font-sans);
  font-variant-numeric: tabular-nums;
  background: #fff;
  color: var(--color-text);
  min-width: 0;
}
.field .unit {
  background: var(--color-bg);
  border: 1px solid var(--color-input-border);
  border-left: 0;
  padding: 8px 10px;
  border-radius: 0 var(--r-input) var(--r-input) 0;
  font: 13px var(--font-sans);
  color: var(--color-text-muted);
  min-width: 28px;
  text-align: center;
}
.field input:focus, .field .unit:focus-within { outline: 2px solid var(--color-primary); outline-offset: 0; }
.field.span-2 { grid-column: 1 / 3; }
@media (max-width: 600px) { .field.span-2 { grid-column: 1; } }

/* Action buttons */
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.btn {
  background: #fff;
  color: var(--color-text-muted);
  border: 1px solid var(--color-input-border);
  padding: 8px 12px;
  border-radius: var(--r-input);
  font: 600 12px var(--font-sans);
  cursor: pointer;
}
.btn:hover { border-color: var(--color-text-muted); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.btn-outline { color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }

/* Result */
.result {
  margin-top: 18px;
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  border-radius: var(--r-card);
  padding: 14px;
}
.result h3 { font-size: 12px; color: var(--color-success-text); margin-bottom: 8px; }
.result .row { display: grid; grid-template-columns: 1fr auto; gap: 4px 18px; font: 13px var(--font-sans); color: var(--color-text); }
.result .row .total { font-weight: 700; padding-top: 6px; border-top: 1px solid var(--color-success-border); }
.result .row .total-value { color: var(--color-primary); font-size: 15px; }

/* Chart */
.chart {
  margin-top: 18px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--r-card);
  padding: 14px;
}
.chart svg { width: 100%; height: auto; display: block; }

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 14px; align-self: start; position: sticky; top: 20px; }
.sidebar .widget { background: #fff; border: 1px solid var(--color-border); border-radius: var(--r-card); padding: 14px; }
.sidebar .widget h3 { font-size: 13px; margin-bottom: 8px; }
.sidebar select {
  width: 100%; padding: 8px; border: 1px solid var(--color-input-border);
  border-radius: var(--r-input); font: 13px var(--font-sans); background: #fff;
}
.sidebar .quicklinks a { display: block; padding: 4px 0; font-size: 12px; }

/* SEO content section */
.seo-section { margin-top: 36px; max-width: 760px; }
.seo-section details { background: #fff; border: 1px solid var(--color-border); border-radius: var(--r-card); padding: 12px 14px; margin-bottom: 8px; }
.seo-section summary { font: 600 13px var(--font-sans); color: var(--color-text); cursor: pointer; }
.seo-section details[open] summary { color: var(--color-primary); }
.seo-section details p { font-size: 13px; line-height: 1.6; color: var(--color-text-muted); margin: 8px 0 0; }

/* Modal (Share) */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(23, 23, 23, 0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  padding: 16px;
}
.modal {
  background: #fff;
  border-radius: var(--r-container);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  padding: 20px;
  max-width: 480px;
  width: 100%;
}
.modal h3 { font-size: 16px; margin-bottom: 8px; }
.modal p { font-size: 13px; color: var(--color-text-muted); margin-bottom: 12px; }
.modal .share-input {
  display: flex; gap: 6px; align-items: stretch;
}
.modal .share-input input {
  flex: 1;
  border: 1px solid var(--color-input-border);
  border-radius: var(--r-input);
  padding: 8px 10px;
  font: 12px ui-monospace, "SF Mono", Menlo, monospace;
  background: var(--color-bg);
  color: var(--color-text);
  min-width: 0;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.modal .share-input input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.18);
}
.modal .share-input .btn-icon {
  display: inline-flex; align-items: center; gap: 6px;
  flex-shrink: 0;
  white-space: nowrap;
}
.modal .copied-toast {
  display: block;
  font: 600 12px var(--font-sans);
  color: var(--color-success-text);
  margin-top: 6px;
  min-height: 16px;
  opacity: 0;
  transition: opacity .2s;
}
.modal .copied-toast.show { opacity: 1; }
.modal .share-actions {
  display: flex; gap: 8px; justify-content: flex-end; margin-top: 14px;
}

/* Footer */
footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 18px 0;
  font-size: 12px;
  margin-top: 24px;
}
footer .inner { display: flex; gap: 18px; flex-wrap: wrap; justify-content: space-between; align-items: center; }
footer a { color: var(--color-footer-text); }
footer a:hover { color: #fff; }
footer .brand-line { color: #fff; font-weight: 600; font-size: 13px; margin-bottom: 4px; }

/* Error */
.error {
  color: var(--color-error);
  background: #fee2e2;
  border: 1px solid #fca5a5;
  border-radius: var(--r-card);
  padding: 10px 12px;
  font-size: 13px;
  margin-top: 12px;
}

/* No-JS fallback */
.nojs-notice {
  background: #fffbe6;
  border: 1px solid #facc15;
  color: #854d0e;
  padding: 10px 14px;
  border-radius: var(--r-card);
  margin: 14px 0;
  font-size: 13px;
}

/* Print */
@media print {
  .topbar, .ad-slot, .actions, .examples, .sidebar, footer, nav { display: none !important; }
  body { background: #fff; color: #000; }
  .main { padding: 0; }
  .card { border: none; box-shadow: none; padding: 0; }
  .result { background: #fff; border: 1px solid #000; }
  a { color: #000; text-decoration: underline; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}