/* Styles partagés entre toutes les apps (landing page, calories, macros, locatif, simple-invest) */

:root {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --input-bg: #334155;
  --border: #475569;
  --warning: #f59e0b;
  --positive: #34d399;
  --negative: #f87171;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.top-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

.back-link { color: var(--accent); text-decoration: none; font-size: 0.85rem; font-weight: 600; transition: color 0.2s ease; }
.back-link:hover { color: var(--accent-hover); }

.lang-selector select {
  background: transparent;
  color: var(--text-sub);
  border: 1px solid var(--border);
  padding: 3px 6px;
  border-radius: 6px;
  cursor: pointer;
  outline: none;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}
.lang-selector select:hover {
  color: var(--text-main);
  border-color: var(--accent);
}