:root {
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --danger: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 25%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow: hidden;
}

/* Typography */
h1, h2, h3 { font-weight: 600; letter-spacing: -0.025em; }
.text-muted { color: var(--text-secondary); font-size: 0.9rem; }

/* Screens & Views */
.screen { display: none; width: 100%; height: 100vh; }
.screen.active { display: flex; }
.view { display: none; flex-direction: column; height: 100%; }
.view.active { display: flex; animation: fadeIn 0.3s ease; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Glassmorphism Panels */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Login */
#login-screen {
    align-items: center;
    justify-content: center;
}
.login-panel {
    padding: 3rem;
    border-radius: 1.5rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.login-panel h1 { margin-bottom: 0.5rem; font-size: 2rem; }
.login-panel .subtitle { color: var(--text-secondary); margin-bottom: 2rem; }

/* Dashboard Layout */
.sidebar {
    width: 280px;
    height: 100vh;
    border-right: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
}
.brand {
    padding: 2rem;
    border-bottom: 1px solid var(--panel-border);
}
.badge {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
    padding: 0.2rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 0.5rem;
    display: inline-block;
}
.sidebar nav {
    padding: 1.5rem 1rem;
    flex: 1;
}
.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    transition: all 0.2s;
}
.nav-item svg { width: 1.25rem; height: 1.25rem; margin-right: 0.75rem; }
.nav-item:hover { background: rgba(255, 255, 255, 0.05); color: var(--text-primary); }
.nav-item.active { background: var(--accent); color: white; box-shadow: 0 4px 12px var(--accent-glow); }
.sidebar-footer { padding: 1.5rem; border-top: 1px solid var(--panel-border); }

.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 2rem 3rem;
}

/* Header */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}
.header-actions { display: flex; gap: 1rem; }

/* Forms & Inputs */
.input-group {
    text-align: left;
    margin-bottom: 1.5rem;
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}
input, textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--panel-border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
textarea { resize: vertical; font-family: monospace; }

/* Buttons */
button {
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.primary-btn {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 4px 12px var(--accent-glow);
}
.primary-btn:hover { background: var(--accent-hover); transform: translateY(-1px); }
.primary-btn svg { width: 1.25rem; height: 1.25rem; margin-right: 0.5rem; }
.secondary-btn {
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--panel-border);
    border-radius: 0.5rem;
}
.secondary-btn:hover { background: rgba(255, 255, 255, 0.15); }
.text-btn {
    width: 100%;
    padding: 0.75rem;
    background: transparent;
    color: var(--text-secondary);
    border: none;
}
.text-btn:hover { color: var(--danger); }

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}
.card {
    padding: 1.5rem;
    border-radius: 1rem;
    transition: transform 0.2s, border-color 0.2s;
    cursor: pointer;
    position: relative;
}
.card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}
.card h3 { margin-bottom: 0.5rem; }
.card .actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    opacity: 0;
    transition: opacity 0.2s;
}
.card:hover .actions { opacity: 1; }
.icon-btn {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border: none;
    border-radius: 0.25rem;
    padding: 0.25rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    backdrop-filter: blur(12px);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}
.toast.show { transform: translateY(0); opacity: 1; }

/* Tabellen, Eingabezeilen, Hinweiskaesten
   ---------------------------------------
   Die Berichte kamen bisher ohne aus. Mit Mitgliedern, Geraeten und
   Pruefprotokoll gibt es drei Tabellen auf einer Seite - ohne gemeinsame
   Regel bekaeme jede ihre eigene. */

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: 0.9rem;
}

.data-table th {
    text-align: left;
    padding: 8px 12px;
    color: var(--text-secondary);
    font-weight: 500;
    border-bottom: 1px solid var(--panel-border);
}

.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    vertical-align: middle;
}

.data-table tr:last-child td { border-bottom: none; }

.data-table code {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.input-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 12px;
    flex-wrap: wrap;
}

.input-row input,
.input-row select {
    flex: 1 1 200px;
    padding: 10px 12px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
}

.input-row input:focus,
.input-row select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-row button { flex: 0 0 auto; }

/* Einmal angezeigte Geheimnisse - Einladungscode, Geraetetoken.
   Sie stehen bewusst auffaellig da: ein zweites Mal gibt es sie nicht. */
.hinweis {
    margin-top: 12px;
    padding: 12px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--accent);
    border-radius: 8px;
    word-break: break-all;
}

.hinweis code {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.text-btn.gefahr { color: var(--danger); }

/* Kennzahlkarten
   --------------
   Eine Zahl gross, darueber woher, darunter was sie bedeutet. Eigene Klasse,
   nicht `.card-grid .card`: Im Autorenwerkzeug ist `.card-grid` auch die
   Ablaufliste, und deren Karten sind Klickflaechen. Eine Regel ueber den
   Elternteil haette sie stumm mitgeaendert. */

.card.kennzahl {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: default;
}

.card.kennzahl:hover {
    transform: none;
    border-color: var(--panel-border);
}

.card.kennzahl strong {
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: -0.03em;
}

.toast.error {
    border-color: var(--danger);
    color: var(--danger);
}

.sidebar-footer a.text-btn {
    display: block;
    margin-bottom: 8px;
    text-decoration: none;
}

/* Diagramme
   ---------
   Inline SVG, kein Paket. Die Breite passt sich an, die Hoehe kommt aus dem
   viewBox-Verhaeltnis - so bleibt es auf einem schmalen Fenster lesbar, ohne
   dass jemand nachrechnet. */

.diagramm {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 8px;
}

.diagramm text {
    font-family: 'Inter', sans-serif;
}