/* ==========================================================================
   Fuhrparkverwaltung — Design System
   ==========================================================================
   Leitidee: eine "Leitstellen-Tafel" für den Fuhrpark — ruhige, neutrale
   Arbeitsflächen, ein klar erkennbares Petrol als einzige Markenfarbe,
   und Statuswerte, die IMMER als Icon + Text + Farbe kodiert sind (nie
   Farbe allein). Betriebsstatus und Sicherheitsstatus werden im gesamten
   System als zwei getrennte, nebeneinanderstehende Badges dargestellt —
   das ist das wiederkehrende Signaturelement der Anwendung.
   ========================================================================== */

:root {
  /* --- Farben: neutrale Basis ------------------------------------------ */
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-surface-sunken: #eceef1;
  --color-border: #dde1e6;
  --color-border-strong: #c3c9d1;

  --color-text: #1c2530;
  --color-text-muted: #5b6675;
  --color-text-faint: #8994a3;

  /* --- Markenfarbe: Petrol (Fuhrpark/Leitstelle, bewusst kein Bootstrap-Blau) */
  --color-brand: #0d5c63;
  --color-brand-strong: #094448;
  --color-brand-soft: #e3f0ef;

  /* --- Statusfarben: immer mit Icon/Text kombiniert, nie isoliert ------- */
  --color-ok: #1a7a3c;
  --color-ok-bg: #e6f4ea;
  --color-ok-border: #b6dfc2;

  --color-warn: #a15c00;
  --color-warn-bg: #fdf1de;
  --color-warn-border: #f0cf9a;

  --color-critical: #b3261e;
  --color-critical-bg: #fbe9e7;
  --color-critical-border: #f0b8b2;

  --color-neutral-badge-bg: #eceef1;
  --color-neutral-badge-text: #4b5563;

  /* --- Typografie -------------------------------------------------------- */
  --font-ui: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-data: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.8125rem;
  --fs-base: 0.9375rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.625rem;
  --fs-xxl: 2rem;

  --lh-base: 1.5;

  /* --- Abstände (4px-Raster) ---------------------------------------------- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;

  /* --- Radien / Schatten / Übergänge --------------------------------------- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(20, 30, 40, 0.06);
  --shadow-md: 0 4px 12px rgba(20, 30, 40, 0.10);
  --shadow-focus: 0 0 0 3px rgba(13, 92, 99, 0.30);

  --transition-fast: 120ms ease;

  /* --- Touch-Ziele --------------------------------------------------------- */
  --tap-target: 44px;

  /* --- Layout -------------------------------------------------------------- */
  --sidebar-width: 248px;
  --topbar-height: 56px;
  --bottom-nav-height: 64px;
  --content-max-width: 1180px;
}

@media (prefers-color-scheme: dark) {
  /* Bewusst kein automatisches Dark Mode -- interne Betriebsanwendung mit
     definierter Markenidentität. Reserviert für eine spätere, explizite
     Umschaltung statt stiller Systemabhängigkeit. */
}

/* --- Reset / Grundgerüst -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0 0 var(--space-3); font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-xxl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }
p { margin: 0 0 var(--space-3); color: var(--color-text-muted); }
a { color: var(--color-brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.numeric, .mono { font-family: var(--font-data); font-variant-numeric: tabular-nums; }

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

/* --- Layout-Grundgerüst ---------------------------------------------------- */
.app-shell {
  display: flex;
  min-height: 100vh;
}
.app-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}
.app-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.app-topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.app-content {
  flex: 1;
  padding: var(--space-5);
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
}

/* --- Navigation (Desktop-Sidebar) ------------------------------------------ */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4);
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--color-brand-strong);
  border-bottom: 1px solid var(--color-border);
}
.brand-mark {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: var(--fs-sm);
  font-weight: 700;
}
.nav-group { padding: var(--space-3) 0; }
.nav-group-label {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  font-weight: 600;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-link:hover { background: var(--color-surface-sunken); color: var(--color-text); text-decoration: none; }
.nav-link.active {
  color: var(--color-brand-strong);
  background: var(--color-brand-soft);
  border-left-color: var(--color-brand);
  font-weight: 600;
}
.nav-icon { width: 18px; text-align: center; flex-shrink: 0; }

.user-chip {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.user-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--color-brand-soft);
  color: var(--color-brand-strong);
  display: grid; place-items: center;
  font-weight: 700; font-size: var(--fs-sm);
  flex-shrink: 0;
}
.user-meta { min-width: 0; }
.user-name { font-size: var(--fs-sm); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: var(--fs-xs); color: var(--color-text-faint); }

/* --- Buttons ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--tap-target);
  padding: 0 var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--color-brand); color: #fff; }
.btn-primary:hover { background: var(--color-brand-strong); }
.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border-strong); }
.btn-secondary:hover { background: var(--color-surface-sunken); }
.btn-danger { background: var(--color-critical); color: #fff; }
.btn-danger:hover { filter: brightness(0.92); }
.btn-ghost { background: transparent; color: var(--color-text-muted); }
.btn-ghost:hover { background: var(--color-surface-sunken); }
.btn-block { width: 100%; }
.btn-lg { min-height: 52px; font-size: var(--fs-base); padding: 0 var(--space-5); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* --- Formulare ---------------------------------------------------------------- */
.field { margin-bottom: var(--space-4); }
.field label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.field-hint { font-size: var(--fs-xs); color: var(--color-text-faint); margin-top: var(--space-1); }
.field-error { font-size: var(--fs-xs); color: var(--color-critical); margin-top: var(--space-1); font-weight: 600; }

input[type="text"], input[type="password"], input[type="number"],
input[type="date"], input[type="email"], select, textarea {
  width: 100%;
  min-height: var(--tap-target);
  padding: var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
textarea { min-height: 96px; resize: vertical; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-brand);
  box-shadow: var(--shadow-focus);
}
input.has-error, textarea.has-error { border-color: var(--color-critical); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

/* Große Auswahlfelder für mobile Formulare (Dringlichkeit, Kategorie etc.) */
.choice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.choice-btn {
  min-height: 56px;
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-weight: 600;
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.choice-btn[aria-pressed="true"] {
  border-color: var(--color-brand);
  background: var(--color-brand-soft);
  color: var(--color-brand-strong);
}
.choice-btn.tone-critical[aria-pressed="true"] {
  border-color: var(--color-critical);
  background: var(--color-critical-bg);
  color: var(--color-critical);
}

/* --- Karten -------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.card-body { padding: var(--space-5); }
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* --- Statusbadges: Signaturelement der Anwendung -----------------------------
   IMMER Icon + Text + Farbe. Betriebsstatus und Sicherheitsstatus werden
   nebeneinander, aber klar getrennt dargestellt (.status-pair). */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--fs-xs);
  font-weight: 700;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-icon { font-size: 0.9em; line-height: 1; }
.badge-ok { background: var(--color-ok-bg); color: var(--color-ok); border-color: var(--color-ok-border); }
.badge-warn { background: var(--color-warn-bg); color: var(--color-warn); border-color: var(--color-warn-border); }
.badge-critical { background: var(--color-critical-bg); color: var(--color-critical); border-color: var(--color-critical-border); }
.badge-neutral { background: var(--color-neutral-badge-bg); color: var(--color-neutral-badge-text); }

.status-pair { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.status-pair .status-label { font-size: var(--fs-xs); color: var(--color-text-faint); margin-right: var(--space-1); }

/* Ampel-Punkte für Fristen (immer zusätzlich zum Text, nie allein) */
.deadline-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.deadline-dot.gruen { background: var(--color-ok); }
.deadline-dot.gelb { background: #d4a017; }
.deadline-dot.orange { background: #e07b1a; }
.deadline-dot.rot { background: var(--color-critical); }

/* --- Tabellen (Desktop) / Karten (Mobile) -------------------------------------- */
.data-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.data-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-faint);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-border);
}
.data-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.data-table tbody tr { transition: background var(--transition-fast); }
.data-table tbody tr:hover { background: var(--color-surface-sunken); cursor: pointer; }

/* Unter 720px werden Tabellen zu Listen von Karten (keine horizontale
   Scroll-Falle auf dem Smartphone). */
@media (max-width: 720px) {
  .data-table thead { display: none; }
  .data-table, .data-table tbody, .data-table tr, .data-table td { display: block; width: 100%; }
  .data-table tr {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    padding: var(--space-3) var(--space-4);
    box-shadow: var(--shadow-sm);
  }
  .data-table td {
    border: none;
    padding: var(--space-1) 0;
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
  }
  .data-table td::before {
    content: attr(data-label);
    font-size: var(--fs-xs);
    color: var(--color-text-faint);
    font-weight: 600;
    flex-shrink: 0;
  }
}

/* --- Warnungen / Banner -------------------------------------------------------- */
.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: var(--fs-sm);
  margin-bottom: var(--space-4);
}
.alert-warn { background: var(--color-warn-bg); border-color: var(--color-warn-border); color: var(--color-warn); }
.alert-critical { background: var(--color-critical-bg); border-color: var(--color-critical-border); color: var(--color-critical); }
.alert-info { background: var(--color-brand-soft); border-color: var(--color-border); color: var(--color-brand-strong); }
.alert-icon { font-size: 1.1rem; flex-shrink: 0; }

/* --- Dialoge (nativer <dialog>, leichtgewichtig) ------------------------------- */
dialog.modal {
  border: none;
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: var(--shadow-md);
  width: min(480px, 92vw);
}
dialog.modal::backdrop { background: rgba(20, 30, 40, 0.45); }
.modal-header { padding: var(--space-5) var(--space-5) 0; }
.modal-body { padding: var(--space-4) var(--space-5); }
.modal-footer { padding: var(--space-4) var(--space-5) var(--space-5); display: flex; justify-content: flex-end; gap: var(--space-3); }

/* --- Toasts -------------------------------------------------------------------- */
#toast-region {
  position: fixed;
  bottom: calc(var(--space-5) + env(safe-area-inset-bottom, 0px));
  right: var(--space-5);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.toast {
  background: var(--color-text);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-md);
  max-width: 320px;
}
.toast.tone-critical { background: var(--color-critical); }
.toast.tone-ok { background: var(--color-ok); }

/* --- Empty States --------------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-faint);
}
.empty-state h3 { color: var(--color-text-muted); }

/* --- Utility ---------------------------------------------------------------------- */
.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.cluster { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.spread { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.muted { color: var(--color-text-muted); }
.faint { color: var(--color-text-faint); }
.text-sm { font-size: var(--fs-sm); }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }

/* ==========================================================================
   Mobile-First: Fahrer-Oberfläche
   ========================================================================== */
.mobile-shell { display: none; }

@media (max-width: 900px) {
  .app-sidebar { display: none; }
  .app-content { padding: var(--space-4); padding-bottom: calc(var(--bottom-nav-height) + var(--space-6)); }
}

.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--bottom-nav-height);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  z-index: 30;
}
@media (max-width: 900px) {
  .bottom-nav { display: flex; }
}
.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--color-text-faint);
  font-size: var(--fs-xs);
  font-weight: 600;
}
.bottom-nav-item.active { color: var(--color-brand); }
.bottom-nav-icon { font-size: 1.25rem; }

/* Große primäre Aktionskacheln für die mobile Startseite */
.action-tile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 420px) { .action-tile-grid { grid-template-columns: 1fr; } }
.action-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 128px;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
  font-size: var(--fs-base);
  color: var(--color-text);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.action-tile:hover { box-shadow: var(--shadow-md); text-decoration: none; }
.action-tile:active { transform: scale(0.97); }
.action-tile-icon { font-size: 2rem; }
.action-tile.tone-brand { background: var(--color-brand); color: #fff; border-color: var(--color-brand); }

/* Vehicle-Picker (grosse Touch-Liste) */
.vehicle-picker-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin-bottom: var(--space-3);
  cursor: pointer;
}
.vehicle-picker-item:active { background: var(--color-surface-sunken); }
.vehicle-plate { font-family: var(--font-data); font-weight: 700; font-size: var(--fs-md); }

/* Checklisten-Item (Abfahrtskontrolle) */
.checklist-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-3);
}
.checklist-item:last-child { border-bottom: none; }
.checklist-toggle { display: flex; gap: var(--space-2); }
.check-btn {
  min-width: 52px; min-height: 44px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-border-strong);
  background: var(--color-surface);
  font-weight: 700;
  cursor: pointer;
}
.check-btn.ok[aria-pressed="true"] { border-color: var(--color-ok); background: var(--color-ok-bg); color: var(--color-ok); }
.check-btn.issue[aria-pressed="true"] { border-color: var(--color-critical); background: var(--color-critical-bg); color: var(--color-critical); }

/* --- Login-Seite ------------------------------------------------------------------- */
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--color-brand-strong), var(--color-brand) 60%);
  padding: var(--space-4);
}
.login-card {
  width: min(380px, 100%);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
}
.login-brand { text-align: center; margin-bottom: var(--space-5); }
.login-brand .brand-mark { width: 44px; height: 44px; font-size: var(--fs-lg); margin: 0 auto var(--space-3); }

/* --- Skip Link (Tastaturbedienung) --------------------------------------------------- */
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--color-brand); color: #fff;
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm);
  z-index: 200;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* --- Reduzierte Bewegung respektieren -------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}