:root {
    color-scheme: light dark;
    --bg: #f5f7f7;
    --surface: #ffffff;
    --surface-alt: #eef3f2;
    --border: #dde4e3;
    --text: #14161a;
    --text-muted: #707072;
    --primary: #008c85;
    --primary-hover: #00706a;
    --primary-contrast: #ffffff;
    --accent-bg: rgba(99, 185, 179, 0.16);
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #16a34a;
    --success-bg: #dcfce7;
    --danger-bg: #fee2e2;
    --warning-bg: #fef9c3;
    --warning-text: #a16207;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 2px 6px rgba(16, 24, 40, 0.06);
    --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.12), 0 2px 6px rgba(16, 24, 40, 0.08);
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #101615;
        --surface: #1a2120;
        --surface-alt: #212a29;
        --border: #2b3534;
        --text: #e7e9ee;
        --text-muted: #a2a2a3;
        --primary: #14a89f;
        --primary-hover: #2fc0b6;
        --primary-contrast: #ffffff;
        --accent-bg: rgba(99, 185, 179, 0.18);
        --danger: #f87171;
        --danger-hover: #ef4444;
        --success: #4ade80;
        --success-bg: rgba(74, 222, 128, 0.15);
        --danger-bg: rgba(248, 113, 113, 0.15);
        --warning-bg: rgba(250, 204, 21, 0.15);
        --warning-text: #facc15;
        --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.35);
        --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.55), 0 2px 8px rgba(0, 0, 0, 0.4);
    }
}
* { box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0; background: var(--bg); color: var(--text);
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; }

header {
    position: sticky; top: 0; z-index: 10;
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
    flex-wrap: wrap;
}
header .brand {
    display: flex; align-items: center; gap: 0.6rem;
    text-decoration: none; font-weight: 700; font-size: 1.05rem; color: var(--text);
}
header .brand img { height: 1.9rem; width: auto; display: block; }
header nav { display: flex; align-items: center; gap: 0.25rem; flex-wrap: wrap; }
header nav > a, .nav-dropdown summary {
    padding: 0.4rem 0.7rem; border-radius: var(--radius-sm); font-weight: 500; font-size: 0.9rem;
    color: var(--text-muted); text-decoration: none; cursor: pointer; list-style: none;
    transition: background 0.15s ease, color 0.15s ease;
}
header nav > a::-webkit-details-marker { display: none; }
header nav > a:hover, .nav-dropdown summary:hover { background: var(--surface-alt); color: var(--text); }
header nav > a.active { background: var(--accent-bg); color: var(--primary); }
.nav-reload-btn {
    padding: 0.4rem 0.6rem; border-radius: var(--radius-sm); font-weight: 500; font-size: 1rem;
    color: var(--text-muted); background: none; border: none; cursor: pointer; line-height: 1;
    transition: background 0.15s ease, color 0.15s ease, transform 0.4s ease;
}
.nav-reload-btn:hover { background: var(--surface-alt); color: var(--text); }
.nav-reload-btn:active { transform: rotate(180deg); }
.nav-dropdown { position: relative; }
.nav-dropdown summary { display: flex; align-items: center; gap: 0.3rem; }
.nav-dropdown summary::after { content: '▾'; font-size: 0.7em; }
.nav-dropdown[open] summary { background: var(--surface-alt); color: var(--text); }
.nav-dropdown-menu {
    position: absolute; top: calc(100% + 0.4rem); right: 0; z-index: 20; min-width: 12rem;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow-lg); padding: 0.35rem; display: flex; flex-direction: column;
}
.nav-dropdown-menu a {
    padding: 0.5rem 0.6rem; border-radius: var(--radius-sm); font-size: 0.88rem; text-decoration: none;
    color: var(--text); transition: background 0.15s ease;
}
.nav-dropdown-menu a:hover { background: var(--surface-alt); }
.nav-dropdown-menu a.active { color: var(--primary); font-weight: 600; }

main { max-width: 1760px; margin: 2rem auto; padding: 0 1.25rem 3rem; }
main.full-width { max-width: none; margin: 1.25rem auto; }
main.auth-main {
    max-width: 34rem; margin: 0 auto; min-height: calc(100vh - 4.5rem);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 1rem; padding: 1.25rem;
}
main.auth-main .card { margin-bottom: 0; }

h1 { font-size: 1.35rem; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.05rem; margin: 0 0 1rem; letter-spacing: -0.01em; }

.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1.5rem; box-shadow: var(--shadow); margin-bottom: 1.5rem;
}
.card.viewer-card { padding: 1rem; }
.card.auth-card { width: 100%; box-shadow: var(--shadow-lg); }

.table-scroll { overflow-x: auto; margin: -0.25rem; padding: 0.25rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.65rem 0.75rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr { transition: background 0.12s ease; }
tbody tr:hover { background: var(--surface-alt); }
tbody tr:last-child td { border-bottom: none; }

.status-online, .status-offline {
    /* Muss auf einem <span> sitzen, nicht direkt auf dem <td> - display:inline-flex auf
       einem Table-Cell selbst hebelt dessen display:table-cell aus und bringt die Zelle
       gegenueber den anderen Zeilenzellen aus der vertikalen Mitte (siehe Templates, die
       diese Klasse immer auf ein <span> innerhalb des <td> setzen). */
    display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 600; font-size: 0.85rem;
}
.status-online { color: var(--success); }
.status-offline { color: var(--text-muted); }
.status-online::before, .status-offline::before {
    content: ''; width: 0.45rem; height: 0.45rem; border-radius: 999px; background: currentColor;
}

.badge-unclaimed {
    display: inline-block; margin-left: 0.5rem; padding: 0.15rem 0.5rem; border-radius: 999px;
    background: var(--warning-bg); color: var(--warning-text); font-size: 0.72rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.02em;
}

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
    background: var(--primary); color: var(--primary-contrast); border: 1px solid transparent;
    padding: 0.5rem 1rem; border-radius: var(--radius-sm); cursor: pointer; text-decoration: none;
    font-size: 0.88rem; font-weight: 600; transition: background 0.15s ease, transform 0.05s ease;
}
.btn:hover { background: var(--primary-hover); }
.btn:active { transform: translateY(1px); }
.btn.secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn.secondary:hover { background: var(--surface-alt); }
.btn.secondary.active { background: var(--primary); color: var(--primary-contrast); border-color: var(--primary); }
.btn.secondary.active:hover { background: var(--primary-hover); }
.btn.danger { background: transparent; color: var(--danger); border-color: var(--border); }
.btn.danger:hover { background: var(--danger-bg); border-color: var(--danger); }

input[type=text], input[type=password], input[type=file], select, textarea {
    padding: 0.55rem 0.7rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
    width: 100%; background: var(--surface); color: var(--text); font-size: 0.9rem;
    font-family: inherit; transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input[type=text]:focus, input[type=password]:focus, select:focus, textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent);
}
form.inline { display: inline-block; }
.error {
    color: var(--danger); background: var(--danger-bg); border-radius: var(--radius-sm);
    padding: 0.6rem 0.8rem; margin-bottom: 1rem; font-size: 0.9rem;
}
label { display: block; margin: 0.6rem 0 0.3rem; font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
code {
    background: var(--surface-alt); padding: 0.15rem 0.45rem; border-radius: 4px;
    font-size: 0.85em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.hint { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.75rem; }

details > summary { cursor: pointer; }
details.inline-details { display: inline-block; vertical-align: middle; }

.viewer-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.viewer-header h1 { flex: 1 1 auto; margin: 0; }
.codec-switch { display: inline-flex; vertical-align: middle; margin-left: 0.4rem; border-radius: 999px; overflow: hidden; border: 1px solid var(--border); font-size: 0.6rem; }
.codec-switch .codec-btn { border: none; background: var(--surface-alt); color: var(--text-muted); font: inherit; font-weight: 700; letter-spacing: 0.02em; padding: 0.2rem 0.55rem; cursor: pointer; }
.codec-switch .codec-btn.active { background: var(--primary); color: var(--primary-contrast); cursor: default; }
.codec-switch .codec-btn:hover:not(.active) { background: var(--accent-bg); }
.viewer-status { font-size: 0.85rem; padding: 0.25rem 0.7rem; border-radius: 999px; background: var(--surface-alt); color: var(--text-muted); font-weight: 600; }
.viewer-status.online { background: var(--success-bg); color: var(--success); }
.viewer-status.offline { background: var(--danger-bg); color: var(--danger); }
.viewer-status.connecting { background: var(--warning-bg); color: var(--warning-text); }
.viewer-body { display: flex; gap: 1rem; align-items: flex-start; flex-wrap: wrap; }
.viewer-canvas-wrap {
    background: #111827; border-radius: var(--radius); display: flex; justify-content: center;
    align-items: center; position: relative; overflow: hidden; flex: 3 1 480px; min-width: 0;
    height: calc(100vh - 220px); min-height: 320px;
}
.viewer-canvas-wrap:fullscreen { height: 100vh; width: 100vw; border-radius: 0; }
#screen { max-width: 100%; max-height: 100%; width: auto; height: auto; display: block; outline: none; cursor: default; touch-action: none; }
/* Touch-Trackpad-Modus (siehe viewer.js): zeigt die virtuelle Mausposition an, da Fingertipps
   anders als ein echter Mauszeiger keine sichtbare Position auf dem Bildschirm haben. */
.touch-cursor {
    position: absolute; top: 0; left: 0; width: 22px; height: 30px;
    background: #ffffff;
    clip-path: polygon(0% 0%, 0% 70%, 25% 55%, 40% 92%, 56% 85%, 42% 50%, 72% 50%);
    filter: drop-shadow(0 0 1.5px #000000) drop-shadow(0 0 1.5px #000000);
    pointer-events: none; opacity: 0; z-index: 5;
    transition: opacity 0.2s ease, transform 0.08s ease;
}
.touch-cursor.visible { opacity: 0.95; }
.touch-cursor.tap { transform: scale(1.35); }
/* Eingabefeld, das per Fokus die mobile Bildschirmtastatur oeffnet (siehe viewer.js).
   Ist per default display:none - viewer.js schaltet IMMER zuerst auf display:block (Klasse
   "visible"), bevor focus() aufgerufen wird, da manche Mobilbrowser bei focus() auf ein
   noch display:none-Element gar keine Tastatur oeffnen. font-size:16px verhindert
   zusaetzlich iOS' Auto-Zoom-Effekt beim Fokussieren eines Eingabefelds. */
.keyboard-input {
    position: absolute; left: 0.75rem; right: 0.75rem; bottom: 0.75rem; z-index: 6;
    display: none; box-sizing: border-box; width: calc(100% - 1.5rem);
    padding: 0.55rem 0.75rem; border-radius: var(--radius-sm); border: 1px solid var(--border);
    font-size: 16px; background: var(--surface); color: var(--text);
}
.keyboard-input.visible { display: block; }
/* Frei verschiebbarer Container fuer Zoom-Leiste + Monitor-Auswahl (viewer.js,
   setupOverlayControls) - beide sassen frueher fest in Bildschirmecken und lagen dadurch
   manchmal genau ueber dem Bereich, den man als naechstes anklicken wollte. Position und
   Eingeklappt-Zustand werden pro Browser in localStorage gemerkt. */
.viewer-overlay-controls {
    position: absolute; bottom: 0.75rem; right: 0.75rem; z-index: 3;
    display: flex; flex-direction: column; gap: 0.35rem; max-width: calc(100% - 1.5rem);
}
.viewer-overlay-handle {
    display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
    background: rgba(17, 24, 39, 0.85); color: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.3); border-radius: var(--radius-sm);
    padding: 0.1rem 0.2rem 0.1rem 0.5rem; cursor: move; touch-action: none;
    font-size: 0.8rem; user-select: none;
}
.viewer-overlay-grip { opacity: 0.8; }
.viewer-overlay-collapse {
    background: none; border: none; color: inherit; cursor: pointer; font-size: 1rem;
    line-height: 1.4; padding: 0 0.35rem;
}
.viewer-overlay-collapse:hover { color: #fff; }
.viewer-overlay-controls.collapsed .viewer-overlay-body { display: none; }
.viewer-overlay-body { display: flex; flex-direction: column; gap: 0.35rem; align-items: flex-end; }
.monitor-select {
    width: auto; background: rgba(17, 24, 39, 0.85); color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3); border-radius: var(--radius-sm);
    padding: 0.35rem 0.5rem; font-size: 0.85rem;
}
.zoom-toolbar { display: flex; gap: 0.25rem; }
.zoom-toolbar .btn {
    background: rgba(17, 24, 39, 0.85); color: #fff; border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.3rem 0.55rem; font-size: 0.85rem; min-width: 2.4rem;
}
.zoom-toolbar .btn.active { background: var(--primary); border-color: var(--primary); }
.viewer-hint { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.75rem; }

/* Reiner Dateitransfer-Modus (?mode=files, siehe connect.php) - kein Bildschirm-Stream,
   das Dateien-Panel nimmt die volle Breite ein, die übrigen Tabs sind serverseitig gar
   nicht erst gerendert (siehe connect.php). */
.viewer-card.files-only #fullscreen-btn,
.viewer-card.files-only .viewer-canvas-wrap { display: none; }
.viewer-card.files-only .viewer-sidepanel { flex: 1 1 100%; height: auto; min-height: 420px; }

/* Sofort-Support-Sitzung, bei der die hilfesuchende Person im Verbindungsdialog nur den
   Bildschirm freigegeben hat (siehe 0x0C SessionMode, docs/binary-protocol.md) - Dateien/
   Zwischenablage/Tastaturbefehle sind serverseitig ohnehin wirkungslos (CaptureHelper
   bekommt diese Frames gar nicht erst), die Bedienelemente dafuer werden deshalb ausgeblendet
   statt eine Illusion von Funktionalitaet zu zeigen. Klasse wird von viewer.js gesetzt. */
.viewer-card.view-only #keyboard-btn,
.viewer-card.view-only #control-toggle-btn,
.viewer-card.view-only .viewer-sidepanel { display: none; }
.viewer-card.view-only .viewer-canvas-wrap { flex: 1 1 100%; }
.view-only-badge { background: var(--warning-bg); color: var(--warning-text); }

.viewer-sidepanel {
    flex: 1 1 320px; display: flex; flex-direction: column;
    height: calc(100vh - 220px); min-height: 320px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.sidepanel-tabs { display: flex; border-bottom: 1px solid var(--border); flex: 0 0 auto; }
.sidepanel-tab {
    flex: 1 1 auto; background: none; border: none; padding: 0.65rem; cursor: pointer;
    font-size: 0.85rem; font-weight: 500; color: var(--text-muted); border-bottom: 2px solid transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
}
.sidepanel-tab:hover { color: var(--text); }
.sidepanel-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.sidepanel-content {
    flex: 1 1 auto; overflow-y: auto; padding: 0.85rem; display: flex; flex-direction: column; gap: 0.6rem;
}
.file-toolbar { display: flex; align-items: center; gap: 0.5rem; }
.file-toolbar .btn { padding: 0.35rem 0.6rem; font-size: 0.85rem; }
.file-path {
    flex: 1 1 auto; font-size: 0.8rem; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis;
    white-space: nowrap;
}
.file-upload-label { cursor: pointer; }
.file-bulk-toolbar {
    display: flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; color: var(--text-muted);
}
.file-bulk-toolbar .btn { padding: 0.3rem 0.55rem; font-size: 0.8rem; }
.file-bulk-count { flex: 1 1 auto; }
.file-error { color: var(--danger); font-size: 0.85rem; }
.file-transfer-progress { display: flex; flex-wrap: wrap; align-items: center; gap: 0.3rem 0.5rem; font-size: 0.8rem; }
.file-transfer-progress #file-transfer-label {
    flex: 1 1 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.file-transfer-progress progress { flex: 1 1 auto; accent-color: var(--primary); }
.file-transfer-speed { flex: 0 0 auto; color: var(--text-muted); white-space: nowrap; }
.file-transfer-progress .btn { padding: 0.25rem 0.5rem; font-size: 0.8rem; }
.file-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.file-table th { padding: 0.2rem 0.3rem; border-bottom: 1px solid var(--border); }
.file-table td { padding: 0.4rem 0.3rem; border-bottom: 1px solid var(--border); white-space: normal; }
.file-table tr.file-row { cursor: pointer; }
.file-table tr.file-row:hover { background: var(--surface-alt); }
.file-table td.file-size, .file-table td.file-mtime, .file-table th.file-size, .file-table th.file-mtime { color: var(--text-muted); white-space: nowrap; text-align: right; }
.file-table td.file-actions, .file-table th.file-actions { white-space: nowrap; text-align: right; width: 1%; }
.file-table td.file-checkbox-col, .file-table th.file-checkbox-col { width: 1%; white-space: nowrap; }
.file-table td.file-checkbox-col input, .file-table th.file-checkbox-col input { cursor: pointer; }
.file-action-btn {
    background: none; border: none; cursor: pointer; padding: 0.15rem 0.35rem; font-size: 0.9rem;
    color: var(--text-muted); border-radius: var(--radius-sm);
}
.file-action-btn:hover { color: var(--text); background: var(--surface-alt); }
.sidepanel-content textarea {
    width: 100%; min-height: 90px; resize: vertical;
}
.sidepanel-content label { margin: 0; font-weight: 600; color: var(--text); }
.clipboard-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.clipboard-actions .btn { font-size: 0.8rem; padding: 0.4rem 0.6rem; }
.shortcut-grid { display: flex; flex-direction: column; gap: 0.4rem; }
.shortcut-btn { font-size: 0.85rem; padding: 0.5rem 0.7rem; text-align: left; }

@media (max-width: 640px) {
    header { padding: 0.65rem 1rem; }
    main { margin: 1.25rem auto; padding: 0 1rem 2rem; }
    .viewer-canvas-wrap, .viewer-sidepanel { height: 60vh; min-height: 260px; flex: 1 1 100%; }
    th, td { padding: 0.5rem 0.5rem; }
}

/* Eingebettete Fernwartungs-Tabs (siehe dashboard.php, session-tabs-bar) - jede offene
   Fernwartung laeuft in einem eigenen <iframe> auf /connect?...&embed=1, das layout_embed.php
   statt layout.php nutzt (kein doppelter Seiten-Header/Nav innerhalb des Tabs). Body braucht
   hier deutlich weniger Vertikal-Abzug als im normalen Layout, da Header/Nav/Main-Aussenabstand
   wegfallen. */
body.embed { height: 100vh; overflow: hidden; }
body.embed main { margin: 0; padding: 0.6rem; height: 100vh; }
body.embed .card.viewer-card { height: 100%; display: flex; flex-direction: column; margin-bottom: 0; }
body.embed .viewer-canvas-wrap, body.embed .viewer-sidepanel { height: calc(100vh - 110px); }

.session-tabs-bar {
    display: flex; align-items: flex-end; gap: 0.25rem; margin-bottom: 1rem;
    border-bottom: 1px solid var(--border); overflow-x: auto;
}
.session-tab {
    display: flex; align-items: center; gap: 0.5rem; flex: 0 0 auto; max-width: 16rem;
    background: var(--surface-alt); color: var(--text-muted); border: 1px solid var(--border);
    border-bottom: none; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: 0.5rem 0.5rem 0.5rem 0.85rem; cursor: pointer; font-size: 0.85rem; font-weight: 500;
    transition: background 0.15s ease, color 0.15s ease;
}
.session-tab:hover { color: var(--text); }
.session-tab.active { background: var(--surface); color: var(--text); font-weight: 600; }
.session-tab-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-tab-close {
    flex: 0 0 auto; background: none; border: none; cursor: pointer; color: inherit; opacity: 0.65;
    font-size: 1rem; line-height: 1; padding: 0.1rem 0.3rem; border-radius: var(--radius-sm);
}
.session-tab-close:hover { opacity: 1; background: var(--danger-bg); color: var(--danger); }
.session-tab-content-wrap { display: none; height: calc(100vh - 170px); min-height: 420px; }
.session-tab-content-wrap.active { display: block; }
.session-tab-content-wrap iframe { width: 100%; height: 100%; border: none; border-radius: var(--radius); }