/* =========================================================
   AEVO – Trainer – Global Design System (v1.1)
   Einheitliches Layout für: Login, App, Admin
   Fix: bessere Select/Dropdown-Lesbarkeit (Dark UI)
   ========================================================= */

/* ---------- Reset / Base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Helvetica, Arial, sans-serif;
  line-height: 1.45;
  background: var(--bg);
  color: var(--text);
}

a { color: inherit; }
img { max-width: 100%; height: auto; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }

/* ---------- Theme Tokens ---------- */
:root {
  /* Layout */
  --container: 1100px;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 10px 30px rgba(0,0,0,.08);

  /* Colors */
  --bg: #0b1020;          /* deep navy */
  --surface: #111a33;     /* cards */
  --surface-2: #0f1730;   /* secondary panels */
  --border: rgba(255,255,255,.12);

  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.68);

  --primary: #4ea1ff;
  --primary-2: #2f7fe0;

  --good: #35d07f;
  --warn: #ffcc66;
  --bad:  #ff5c7a;

  /* Controls */
  --input-bg: rgba(255,255,255,.06);
  --input-border: rgba(255,255,255,.16);
  --focus: rgba(78,161,255,.35);

  /* Spacing */
  --p-1: 10px;
  --p-2: 14px;
  --p-3: 18px;
  --p-4: 24px;
}

/* ---------- Containers ---------- */
.aiu-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--p-2);
}
.aiu-page {
  padding: 28px 0 42px;
}

/* ---------- Topbar / Navigation (App + Admin) ---------- */
.aiu-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(11,16,32,.75);
  border-bottom: 1px solid var(--border);
}
.aiu-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}
.aiu-brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.aiu-brand strong { font-size: 15px; letter-spacing: .2px; }
.aiu-brand span { color: var(--muted); font-size: 12px; }

.aiu-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.aiu-tab {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 650;
  font-size: 13px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.aiu-tab:hover { background: rgba(255,255,255,.07); }
.aiu-tab.is-active {
  border-color: rgba(78,161,255,.55);
  background: rgba(78,161,255,.12);
}

/* ---------- Cards / Panels ---------- */
.aiu-grid {
  display: grid;
  gap: 14px;
}
.aiu-grid.cols-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.aiu-grid.cols-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.aiu-grid.cols-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }

@media (max-width: 980px) { .aiu-grid.cols-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 860px) { .aiu-grid.cols-3 { grid-template-columns: 1fr; } }
@media (max-width: 780px) { .aiu-grid.cols-2 { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .aiu-grid.cols-4 { grid-template-columns: 1fr; } }

.aiu-card, .aiu-panel {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.aiu-card { padding: var(--p-3); }
.aiu-panel { padding: var(--p-3); }

.aiu-card h3, .aiu-panel h2 { margin: 0 0 8px; }
.aiu-sub { color: var(--muted); font-size: 13px; margin: 0; }

/* ---------- Buttons ---------- */
.aiu-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 750;
  font-size: 13px;
}
.aiu-btn:hover { background: rgba(255,255,255,.07); }

.aiu-btn.primary {
  border: none;
  background: linear-gradient(180deg, var(--primary), var(--primary-2));
  color: #081024;
}
.aiu-btn.primary:hover { filter: brightness(1.05); }

.aiu-btn.danger {
  border: none;
  background: linear-gradient(180deg, var(--bad), #e64562);
  color: #1a0810;
}

.aiu-btn.small { padding: 7px 10px; border-radius: 10px; font-weight: 700; }

/* ---------- Inputs ---------- */
.aiu-field { margin: 10px 0; }
.aiu-label { display:block; font-weight: 750; margin: 0 0 6px; font-size: 13px; }
.aiu-input, .aiu-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  outline: none;
}
.aiu-input:focus, .aiu-select:focus {
  border-color: rgba(78,161,255,.55);
  box-shadow: 0 0 0 4px var(--focus);
}

/* ---------- SELECT FIX (Dark, kontrastreich, consistent) ---------- */
/* Viele Browser nutzen OS-UI für Dropdowns; wir erzwingen Dark-Scheme + bessere Kontraste */
.aiu-select {
  color-scheme: dark;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;

  /* Platz für Pfeil */
  padding-right: 42px;

  /* Custom Pfeil */
  background-image:
    linear-gradient(45deg, transparent 50%, rgba(255,255,255,.8) 50%),
    linear-gradient(135deg, rgba(255,255,255,.8) 50%, transparent 50%),
    linear-gradient(to right, transparent, transparent);
  background-position:
    calc(100% - 22px) calc(50% - 2px),
    calc(100% - 16px) calc(50% - 2px),
    calc(100% - 2.6rem) 50%;
  background-size:
    6px 6px,
    6px 6px,
    1px 2.2rem;
  background-repeat: no-repeat;
}
.aiu-select:hover { border-color: rgba(255,255,255,.22); }

/* Options: funktioniert nicht überall gleich, hilft aber in vielen Browsern deutlich */
.aiu-select option {
  background: #111a33;
  color: rgba(255,255,255,.92);
}

/* ---------- Badges ---------- */
.aiu-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  font-size: 12px;
  font-weight: 750;
}
.aiu-badge.good { border-color: rgba(53,208,127,.35); background: rgba(53,208,127,.10); }
.aiu-badge.warn { border-color: rgba(255,204,102,.35); background: rgba(255,204,102,.10); }
.aiu-badge.bad  { border-color: rgba(255,92,122,.35); background: rgba(255,92,122,.10); }

/* ---------- Tables (Admin) ---------- */
.aiu-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius);
}
.aiu-table th, .aiu-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
.aiu-table th {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .2px;
  font-weight: 800;
}
.aiu-table tr:hover td { background: rgba(255,255,255,.03); }

/* ---------- Messages ---------- */
.aiu-msg {
  margin: 12px 0;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
}
.aiu-msg.good { border-color: rgba(53,208,127,.35); background: rgba(53,208,127,.10); }
.aiu-msg.bad  { border-color: rgba(255,92,122,.35); background: rgba(255,92,122,.10); }
.aiu-msg.warn { border-color: rgba(255,204,102,.35); background: rgba(255,204,102,.10); }

/* ---------- Auth layout ---------- */
.aiu-auth {
  max-width: 520px;
  margin: 54px auto;
  padding: 0 var(--p-2);
}
.aiu-auth h1 { margin: 0 0 6px; }
.aiu-auth .aiu-sub { margin-bottom: 14px; }

/* ---------- Utility ---------- */
.aiu-row { display:flex; gap:10px; flex-wrap:wrap; align-items:center; }
.aiu-hidden { display:none !important; }