/* ============================================================
   Signal-DB Admin — Design-System
   orientiert an PiKVM-Infotainment-Pilot + URL-Collector:
     - linke fixierte Sidebar (dark slate)
     - sticky Topbar (light)
     - Body hellgrau, Cards weiss mit weichem Schatten
     - Hover-Lift auf Karten, Glow auf Status-Dots
   ============================================================ */

:root {
  /* Palette (Tailwind-inspired, von URL-Collector) */
  --sd-primary:        #2563eb;
  --sd-primary-hover:  #1d4ed8;
  --sd-primary-soft:   rgba(37, 99, 235, .12);

  --sd-body-bg:        #f1f5f9;
  --sd-surface:        #ffffff;
  --sd-border:         #e2e8f0;

  --sd-text:           #0f172a;
  --sd-text-muted:     #64748b;

  --sd-sidebar-bg:     #1e293b;
  --sd-sidebar-bg-hover: #334155;
  --sd-sidebar-text:   #cbd5e1;
  --sd-sidebar-text-muted: #94a3b8;
  --sd-sidebar-divider: #334155;

  --sd-brand-accent:   #fbbf24;   /* warm yellow fuer "Signal-DB" */

  --sd-success:        #16a34a;
  --sd-warning:        #f59e0b;
  --sd-danger:         #dc2626;
  --sd-info:           #0ea5e9;

  --sd-sidebar-width:  260px;
  --sd-sidebar-collapsed: 72px;
  --sd-topbar-height:  56px;
  --sd-radius-card:    .75rem;
  --sd-radius-pill:    999px;
  --sd-shadow-sm:      0 1px 3px rgba(15, 23, 42, .07);
  --sd-shadow-md:      0 4px 10px rgba(15, 23, 42, .08);
  --sd-shadow-lg:      0 12px 32px rgba(15, 23, 42, .12);
  --sd-transition:     all .15s ease;
}

/* ============================================================
   Basics + Typografie
   ============================================================ */
html, body {
  height: 100%;
  background: var(--sd-body-bg);
  color: var(--sd-text);
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont,
               "Helvetica Neue", Arial, sans-serif;
  font-feature-settings: "tnum";
}
body { margin: 0; min-height: 100vh; }

a { color: var(--sd-primary); }
a:hover { color: var(--sd-primary-hover); }
code { color: #0f172a; background: rgba(15,23,42,.06); padding: .05em .35em; border-radius: 4px; }

/* ============================================================
   Layout-Shell: Sidebar links + Main rechts
   ============================================================ */
.sd-layout {
  display: flex;
  min-height: 100vh;
}

.sd-sidebar {
  width: var(--sd-sidebar-width);
  background: var(--sd-sidebar-bg);
  color: var(--sd-sidebar-text);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
  transition: width .2s ease;
}
.sd-sidebar::-webkit-scrollbar { width: 6px; }
.sd-sidebar::-webkit-scrollbar-thumb { background: var(--sd-sidebar-bg-hover); border-radius: 3px; }

.sd-main {
  flex: 1;
  min-width: 0;        /* damit Tabellen mit overflow-x scrollen koennen */
  display: flex;
  flex-direction: column;
}

/* Sidebar-Brand */
.sd-brand {
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: .75rem;
  font-weight: 600;
  color: #fff;
  border-bottom: 1px solid var(--sd-sidebar-divider);
  font-size: 1.05rem;
  letter-spacing: -.01em;
}
.sd-brand .sd-logo {
  width: 36px; height: 36px;
  background: var(--sd-primary);
  color: #fff;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, .35);
}
.sd-brand .sd-name { color: var(--sd-brand-accent); font-weight: 700; }
.sd-brand small {
  display: block;
  color: var(--sd-sidebar-text-muted);
  font-size: .7rem;
  font-weight: 400;
  letter-spacing: .04em;
  text-transform: uppercase;
}

/* Sidebar-Nav */
.sd-nav {
  padding: .75rem .5rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}
.sd-nav-section {
  color: var(--sd-sidebar-text-muted);
  text-transform: uppercase;
  font-size: .68rem;
  letter-spacing: .07em;
  padding: 1rem .75rem .4rem;
  font-weight: 600;
}
.sd-nav a {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .55rem .75rem;
  color: var(--sd-sidebar-text);
  text-decoration: none;
  border-radius: 8px;
  font-size: .92rem;
  font-weight: 500;
  transition: var(--sd-transition);
}
.sd-nav a:hover {
  background: var(--sd-sidebar-bg-hover);
  color: #fff;
}
.sd-nav a.active {
  background: var(--sd-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, .35);
}
.sd-nav a .sd-icon {
  width: 18px;
  text-align: center;
  flex-shrink: 0;
  font-size: .95rem;
}
.sd-nav a.active .sd-icon { color: #fff; }

/* Sidebar-Footer (User) */
.sd-sidebar-footer {
  padding: .75rem 1rem;
  border-top: 1px solid var(--sd-sidebar-divider);
  font-size: .82rem;
  color: var(--sd-sidebar-text-muted);
}
.sd-sidebar-footer .sd-user {
  color: #fff;
  font-weight: 500;
  word-break: break-all;
}
.sd-sidebar-footer .sd-scopes {
  display: inline-block;
  margin-top: .2rem;
  padding: 1px 7px;
  font-size: .65rem;
  background: var(--sd-sidebar-bg-hover);
  color: var(--sd-sidebar-text);
  border-radius: var(--sd-radius-pill);
  letter-spacing: .03em;
}
.sd-sidebar-footer form { margin-top: .75rem; }
.sd-sidebar-footer .btn-logout {
  width: 100%;
  background: transparent;
  border: 1px solid var(--sd-sidebar-bg-hover);
  color: var(--sd-sidebar-text);
  border-radius: 6px;
  padding: .35rem;
  font-size: .82rem;
  transition: var(--sd-transition);
}
.sd-sidebar-footer .btn-logout:hover {
  background: var(--sd-danger);
  color: #fff;
  border-color: var(--sd-danger);
}

/* ============================================================
   Topbar (sticky, in der Main-Spalte)
   ============================================================ */
.sd-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--sd-topbar-height);
  background: var(--sd-surface);
  border-bottom: 1px solid var(--sd-border);
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--sd-shadow-sm);
}
.sd-topbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--sd-text);
  margin: 0;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sd-topbar form.sd-search { flex-shrink: 0; }
.sd-topbar form.sd-search input {
  width: 260px;
  padding: .35rem .75rem .35rem 2rem;
  border: 1px solid var(--sd-border);
  border-radius: var(--sd-radius-pill);
  background-color: var(--sd-body-bg);
  font-size: .85rem;
  transition: var(--sd-transition);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: .65rem center;
}
.sd-topbar form.sd-search input:focus {
  outline: 2px solid var(--sd-primary-soft);
  border-color: var(--sd-primary);
  background-color: var(--sd-surface);
}

/* ============================================================
   Content-Bereich
   ============================================================ */
.sd-content {
  padding: 1.5rem;
  flex: 1;
}

.sd-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.sd-page-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--sd-text);
  margin: 0;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--sd-surface);
  border: none;
  border-radius: var(--sd-radius-card);
  box-shadow: var(--sd-shadow-sm);
  transition: var(--sd-transition);
}
.card.card-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--sd-shadow-md);
}
.card .card-header {
  background: transparent;
  border-bottom: 1px solid var(--sd-border);
  font-weight: 600;
  font-size: .9rem;
  padding: .75rem 1rem;
}
.card .card-footer {
  background: transparent;
  border-top: 1px solid var(--sd-border);
}

/* Stat-Card (Dashboard-Kacheln) */
.sd-stat {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--sd-surface);
  border-radius: var(--sd-radius-card);
  box-shadow: var(--sd-shadow-sm);
  transition: var(--sd-transition);
  color: inherit;
  text-decoration: none;
}
.sd-stat:hover {
  transform: translateY(-2px);
  box-shadow: var(--sd-shadow-md);
  color: inherit;
}
.sd-stat .sd-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--sd-primary-soft);
  color: var(--sd-primary);
  font-size: 1.2rem;
  flex-shrink: 0;
}
.sd-stat .sd-stat-label {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--sd-text-muted);
  font-weight: 600;
}
.sd-stat .sd-stat-value {
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.1;
  margin-top: .2rem;
}
.sd-stat .sd-stat-value small {
  font-size: .65rem;
  color: var(--sd-text-muted);
  font-weight: 400;
}

.sd-stat-icon.icon-green { background: rgba(22,163,74,.12); color: var(--sd-success); }
.sd-stat-icon.icon-amber { background: rgba(245,158,11,.12); color: var(--sd-warning); }
.sd-stat-icon.icon-sky   { background: rgba(14,165,233,.12); color: var(--sd-info); }
.sd-stat-icon.icon-rose  { background: rgba(220,38,38,.12); color: var(--sd-danger); }

/* ============================================================
   Tabellen
   ============================================================ */
.sd-table-wrap {
  background: var(--sd-surface);
  border-radius: var(--sd-radius-card);
  box-shadow: var(--sd-shadow-sm);
  overflow: hidden;
}
.sd-table-wrap .table { margin: 0; }
.sd-table-wrap .table thead th {
  background: var(--sd-body-bg);
  color: var(--sd-text-muted);
  font-size: .73rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
  border-bottom: 1px solid var(--sd-border);
  padding: .6rem .75rem;
}
.sd-table-wrap .table tbody td {
  padding: .6rem .75rem;
  border-color: var(--sd-border);
  font-size: .88rem;
  vertical-align: middle;
}
.sd-table-wrap .table tbody tr:hover { background: rgba(37, 99, 235, .04); }

/* ============================================================
   Badges + Status-Dots
   ============================================================ */
.sd-badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem .55rem;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .04em;
  border-radius: var(--sd-radius-pill);
  background: var(--sd-body-bg);
  color: var(--sd-text-muted);
  border: 1px solid var(--sd-border);
}
.sd-badge.success { background: rgba(22,163,74,.12); color: var(--sd-success); border-color: transparent; }
.sd-badge.warning { background: rgba(245,158,11,.15); color: var(--sd-warning); border-color: transparent; }
.sd-badge.info    { background: rgba(14,165,233,.12); color: var(--sd-info); border-color: transparent; }
.sd-badge.muted   { background: var(--sd-body-bg); color: var(--sd-text-muted); }

.sd-dot {
  width: .55rem; height: .55rem; border-radius: 50%;
  display: inline-block; background: var(--sd-text-muted);
  vertical-align: middle;
}
.sd-dot.online  { background: var(--sd-success); box-shadow: 0 0 6px var(--sd-success); }
.sd-dot.offline { background: var(--sd-danger); }

/* ============================================================
   Forms
   ============================================================ */
.form-control, .form-select {
  border-radius: 6px;
  border-color: var(--sd-border);
  font-size: .9rem;
}
.form-control:focus, .form-select:focus {
  outline: 2px solid var(--sd-primary-soft);
  border-color: var(--sd-primary);
  box-shadow: none;
}
.form-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--sd-text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: .25rem;
}

/* ============================================================
   Buttons — Bootstrap-Werte verfeinert
   ============================================================ */
.btn {
  border-radius: 8px;
  font-weight: 500;
  transition: var(--sd-transition);
}
.btn-primary, .btn-warning {
  background-color: var(--sd-primary);
  border-color: var(--sd-primary);
}
.btn-primary:hover, .btn-warning:hover {
  background-color: var(--sd-primary-hover);
  border-color: var(--sd-primary-hover);
}

/* ============================================================
   Login-Seite (eigenes Layout, kein Sidebar)
   ============================================================ */
.sd-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at top right, rgba(37,99,235,.10), transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(251,191,36,.08), transparent 50%),
    var(--sd-body-bg);
  padding: 2rem 1rem;
}
.sd-login-card {
  background: var(--sd-surface);
  border-radius: 14px;
  box-shadow: var(--sd-shadow-lg);
  padding: 2rem 2rem 1.75rem;
  width: 100%; max-width: 420px;
}
.sd-login-logo {
  width: 64px; height: 64px;
  background: var(--sd-primary);
  color: #fff;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.7rem;
  margin: 0 auto 1.25rem;
  box-shadow: 0 8px 24px rgba(37, 99, 235, .35);
}
.sd-login h1 {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 .25rem;
}
.sd-login .sd-tagline {
  text-align: center;
  color: var(--sd-text-muted);
  font-size: .85rem;
  margin-bottom: 1.5rem;
}

/* ============================================================
   Breadcrumb-Slim
   ============================================================ */
.breadcrumb {
  background: transparent;
  padding: 0;
  margin: -.25rem 0 1rem;
  font-size: .82rem;
}
.breadcrumb a { text-decoration: none; }
.breadcrumb-item.active { color: var(--sd-text-muted); }

/* ============================================================
   Footer
   ============================================================ */
.sd-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--sd-border);
  font-size: .78rem;
  color: var(--sd-text-muted);
  text-align: center;
}
.sd-footer code { font-size: .8em; }

/* ============================================================
   Responsive — Sidebar wird auf Mobile zum Burger
   ============================================================ */
@media (max-width: 768px) {
  .sd-sidebar {
    position: fixed;
    left: 0; top: 0;
    z-index: 100;
    transform: translateX(-100%);
    box-shadow: var(--sd-shadow-lg);
  }
  .sd-sidebar.open { transform: translateX(0); }
  .sd-main { width: 100%; }
  .sd-topbar form.sd-search input { width: 160px; }
}

/* Burger-Knopf nur auf Mobile sichtbar */
.sd-burger {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.2rem;
  color: var(--sd-text);
}
@media (max-width: 768px) {
  .sd-burger { display: inline-flex; }
}

/* Overlay hinter offener Sidebar */
.sd-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(15,23,42,.4);
  z-index: 90;
}
.sd-overlay.show { display: block; }