/* ============================================================================
 * MF ToDoListe - Stylesheet
 * Modernes, reduziertes Design mit CSS-Variablen fuer Hell-/Dunkelmodus.
 * ========================================================================== */

:root {
    --color-bg: #f4f6f8;
    --color-surface: #ffffff;
    --color-surface-alt: #f0f2f5;
    --color-border: #e0e4e9;
    --color-text: #1f2933;
    --color-text-muted: #6b7684;
    --color-primary: #2c3e50;
    --color-primary-hover: #1a252f;
    --color-accent: #3498db;
    --color-danger: #c0392b;
    --color-danger-bg: #fdecea;
    --color-success: #1e8449;
    --color-warning: #d68910;
    --color-priority-hoch: #e74c3c;
    --color-priority-mittel: #e67e22;
    --color-priority-niedrig: #27ae60;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.14);
    --radius: 8px;
    --header-height: 56px;
    --tabs-height: 48px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #14181c;
        --color-surface: #1d2329;
        --color-surface-alt: #242b32;
        --color-border: #313a42;
        --color-text: #e7ecf0;
        --color-text-muted: #93a0ab;
        --color-primary: #3d566e;
        --color-primary-hover: #4d6a86;
        --color-danger-bg: #3a2323;
    }
}

:root[data-theme="dark"] {
    --color-bg: #14181c;
    --color-surface: #1d2329;
    --color-surface-alt: #242b32;
    --color-border: #313a42;
    --color-text: #e7ecf0;
    --color-text-muted: #93a0ab;
    --color-primary: #3d566e;
    --color-primary-hover: #4d6a86;
    --color-danger-bg: #3a2323;
}

* { box-sizing: border-box; }

/* Das "hidden"-Attribut steuert in dieser App die gesamte Sichtbarkeits-
   Logik (app.js setzt/entfernt es statt mit Klassen zu arbeiten). Ohne
   dieses !important wuerde ein eigenes "display: flex/grid"-Regel auf
   demselben Element (z. B. .login-view) das Standard-[hidden]-Verhalten
   des Browsers ueberschreiben, da Autoren-CSS grundsaetzlich vor dem
   User-Agent-Stylesheet greift - unabhaengig von der Spezifitaet. */
[hidden] { display: none !important; }

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font-family: inherit; font-size: 1rem; }

.muted { color: var(--color-text-muted); font-size: 0.85rem; }

/* ---------------------------------------------------------------------- */
/* Buttons                                                                 */
/* ---------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    background: var(--color-surface-alt);
    color: var(--color-text);
    cursor: pointer;
    font-weight: 500;
    min-height: 40px;
    transition: background-color 0.15s ease, transform 0.05s ease;
    white-space: nowrap;
}
.btn:hover { filter: brightness(0.96); }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-ghost { background: transparent; border-color: var(--color-border); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger-ghost { background: transparent; border-color: var(--color-danger); color: var(--color-danger); }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { min-height: 32px; padding: 6px 10px; font-size: 0.85rem; }
.btn-link {
    background: none; border: none; color: var(--color-accent); cursor: pointer;
    padding: 4px; text-decoration: underline; font-size: 0.9rem;
}
.icon-btn {
    background: none; border: none; cursor: pointer; font-size: 1.1rem;
    width: 40px; height: 40px; border-radius: var(--radius); color: var(--color-text-muted);
    display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--color-surface-alt); color: var(--color-text); }
.icon-btn--danger:hover { background: var(--color-danger-bg); color: var(--color-danger); }

/* ---------------------------------------------------------------------- */
/* Login / Registrierung                                                   */
/* ---------------------------------------------------------------------- */
.login-view {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.login-card {
    background: var(--color-surface);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    padding: 36px 32px;
    width: 100%;
    max-width: 380px;
}
.login-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; justify-content: center; }
.login-brand h1 { font-size: 1.4rem; margin: 0; }
.brand-logo {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--color-primary); color: #fff; font-size: 1.2rem; font-weight: bold;
}
.login-card form label { display: block; font-size: 0.85rem; font-weight: 600; margin: 14px 0 6px; }
.login-card input {
    width: 100%; padding: 10px 12px; border: 1px solid var(--color-border);
    border-radius: var(--radius); background: var(--color-bg); color: var(--color-text);
}
.login-card .btn { margin-top: 20px; }
.login-switch { text-align: center; margin-top: 16px; }
.field-hint { color: var(--color-text-muted); font-size: 0.8rem; margin: 4px 0 0; }
.form-error, .field-error {
    background: var(--color-danger-bg); color: var(--color-danger);
    padding: 8px 12px; border-radius: var(--radius); font-size: 0.85rem; margin: 8px 0;
}

/* ---------------------------------------------------------------------- */
/* Kopfzeile                                                                */
/* ---------------------------------------------------------------------- */
.app-header {
    height: var(--header-height);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 16px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky; top: 0; z-index: 20;
}
.app-header__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.app-header__name { font-size: 1.05rem; }
.app-header__brand .brand-logo { width: 32px; height: 32px; font-size: 1rem; border-radius: 8px; }
.app-header__user { position: relative; }
.user-menu-trigger {
    background: none; border: none; cursor: pointer; color: var(--color-text);
    display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-radius: var(--radius);
    min-height: 40px;
}
.user-menu-trigger:hover { background: var(--color-surface-alt); }
.chevron { font-size: 0.7rem; }
.user-menu {
    position: absolute; right: 0; top: calc(100% + 6px);
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); box-shadow: var(--shadow-md);
    min-width: 220px; padding: 6px; z-index: 30;
}
.user-menu button {
    display: block; width: 100%; text-align: left; background: none; border: none;
    padding: 10px 12px; border-radius: 6px; cursor: pointer; color: var(--color-text); min-height: 40px;
}
.user-menu button:hover { background: var(--color-surface-alt); }
.user-menu hr { border: none; border-top: 1px solid var(--color-border); margin: 6px 0; }

/* ---------------------------------------------------------------------- */
/* Tab-Leiste                                                               */
/* ---------------------------------------------------------------------- */
.tabs-bar {
    display: flex; align-items: stretch; background: var(--color-surface);
    border-bottom: 1px solid var(--color-border); position: sticky; top: var(--header-height); z-index: 15;
}
.tabs-scroll {
    display: flex; overflow-x: auto; scrollbar-width: thin; flex: 1; min-width: 0;
}
.tabs-scroll::-webkit-scrollbar { height: 4px; }
.tabs-scroll::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
.tab {
    display: flex; align-items: center; gap: 6px;
    padding: 0 16px; height: var(--tabs-height);
    background: none; border: none; border-bottom: 3px solid transparent;
    color: var(--color-text-muted); cursor: pointer; white-space: nowrap; flex-shrink: 0;
    touch-action: pan-y;
}
.tab:hover { color: var(--color-text); background: var(--color-surface-alt); }
.tab--active { color: var(--color-primary); border-bottom-color: var(--color-primary); font-weight: 600; }
.tab__badge { font-size: 0.75rem; opacity: 0.8; }
.tab__count {
    background: var(--color-surface-alt); border-radius: 999px; font-size: 0.7rem;
    padding: 1px 7px; color: var(--color-text-muted);
}
.tab--active .tab__count { background: var(--color-primary); color: #fff; }
.tab-add {
    width: var(--tabs-height); height: var(--tabs-height); flex-shrink: 0;
    border: none; background: none; font-size: 1.4rem; color: var(--color-text-muted); cursor: pointer;
}
.tab-add:hover { color: var(--color-primary); background: var(--color-surface-alt); }
.drag-placeholder { opacity: 0.35; border: 2px dashed var(--color-border) !important; background: transparent !important; }

/* ---------------------------------------------------------------------- */
/* Hauptbereich / Toolbar                                                   */
/* ---------------------------------------------------------------------- */
.app-main { max-width: 900px; margin: 0 auto; padding: 20px 16px 80px; }
.list-toolbar {
    display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
    margin-bottom: 16px;
}
.list-toolbar h2 { margin: 0; font-size: 1.3rem; word-break: break-word; }
.list-toolbar__actions { display: flex; flex-wrap: wrap; gap: 8px; }
.readonly-notice {
    background: var(--color-surface-alt); border-left: 3px solid var(--color-accent);
    padding: 8px 12px; border-radius: 6px; font-size: 0.85rem; margin-bottom: 12px;
}

.new-item-form {
    display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap;
    background: var(--color-surface); padding: 12px; border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.new-item-form input[type="text"] {
    flex: 1 1 220px; min-width: 0; padding: 10px 12px; border: 1px solid var(--color-border);
    border-radius: var(--radius); background: var(--color-bg); color: var(--color-text); min-height: 40px;
}
.new-item-form select, .new-item-form input[type="date"] {
    padding: 8px 10px; border: 1px solid var(--color-border); border-radius: var(--radius);
    background: var(--color-bg); color: var(--color-text); min-height: 40px;
}

.items-list-header {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px;
}

/* ---------------------------------------------------------------------- */
/* ToDo-Eintraege                                                           */
/* ---------------------------------------------------------------------- */
.items-list { list-style: none; margin: 0 0 20px; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.items-list--done { border-top: 1px dashed var(--color-border); padding-top: 12px; }

.item-row {
    display: flex; align-items: center; gap: 10px;
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 10px 12px; box-shadow: var(--shadow-sm);
    touch-action: pan-y;
}
.item-row--overdue { border-left: 3px solid var(--color-danger); }
.item-row--done { opacity: 0.65; }
.item-row--done .item-row__text { text-decoration: line-through; }
.item-row--editing { align-items: stretch; }

.item-row__handle {
    cursor: grab; color: var(--color-text-muted); font-size: 1.1rem; padding: 4px;
    touch-action: none; user-select: none;
}
.item-row.dragging { box-shadow: var(--shadow-md); }

.item-row__checkbox { width: 20px; height: 20px; flex-shrink: 0; cursor: pointer; }

.priority-badge {
    flex-shrink: 0; font-size: 0.7rem; font-weight: 700; padding: 3px 9px; border-radius: 999px;
    color: #fff; text-transform: uppercase; letter-spacing: 0.3px;
}
.priority-badge--hoch { background: var(--color-priority-hoch); }
.priority-badge--mittel { background: var(--color-priority-mittel); }
.priority-badge--niedrig { background: var(--color-priority-niedrig); }

.item-row__content { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.item-row__text { word-break: break-word; }
.item-row__due { font-size: 0.75rem; color: var(--color-text-muted); }

.item-row__actions { display: flex; gap: 2px; flex-shrink: 0; }

.item-edit-form { display: flex; flex-wrap: wrap; gap: 8px; width: 100%; align-items: center; }
.item-edit-form input[type="text"] {
    flex: 1 1 200px; min-width: 0; padding: 8px 10px; border: 1px solid var(--color-border);
    border-radius: 6px; background: var(--color-bg); color: var(--color-text);
}
.item-edit-form select, .item-edit-form input[type="date"] {
    padding: 8px; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-bg); color: var(--color-text);
}

.empty-state { text-align: center; color: var(--color-text-muted); padding: 40px 20px; }

/* ---------------------------------------------------------------------- */
/* Modals                                                                   */
/* ---------------------------------------------------------------------- */
.modal-backdrop {
    position: fixed; inset: 0; background: rgba(15, 20, 25, 0.5); z-index: 40;
}
#modal-root {
    position: fixed; inset: 0; z-index: 41; display: flex; align-items: center; justify-content: center;
    padding: 16px; pointer-events: none;
}
#modal-root:empty { display: none; }
.modal {
    background: var(--color-surface); border-radius: 14px; padding: 24px;
    width: 100%; max-width: 440px; max-height: 85vh; overflow-y: auto;
    box-shadow: var(--shadow-md); pointer-events: auto;
}
.modal-lg { max-width: 560px; }
.modal-title { margin: 0 0 12px; font-size: 1.15rem; }
.modal-message { color: var(--color-text-muted); }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }
.modal form label { display: block; font-weight: 600; font-size: 0.85rem; margin: 12px 0 6px; }
.modal form input[type="text"], .modal form input[type="email"], .modal form input[type="password"], .modal form select {
    width: 100%; padding: 9px 11px; border: 1px solid var(--color-border); border-radius: 6px;
    background: var(--color-bg); color: var(--color-text);
}
.checkbox-label { display: flex !important; align-items: center; gap: 8px; }
.checkbox-label input { width: auto !important; }
body.modal-open { overflow: hidden; }

/* Freigabe-Dialog */
.share-add-form { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.share-search-wrap { position: relative; flex: 1 1 200px; }
.share-search-wrap input { width: 100%; padding: 9px 11px; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-bg); color: var(--color-text); }
.share-search-results {
    position: absolute; top: calc(100% + 4px); left: 0; right: 0; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: 8px; box-shadow: var(--shadow-md); z-index: 5; max-height: 180px; overflow-y: auto;
}
.share-search-result { display: block; width: 100%; text-align: left; padding: 8px 12px; background: none; border: none; cursor: pointer; color: var(--color-text); }
.share-search-result:hover { background: var(--color-surface-alt); }
.share-list, .trash-list { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; max-height: 260px; overflow-y: auto; }
.share-row, .trash-row { display: flex; align-items: center; gap: 8px; padding: 8px; background: var(--color-surface-alt); border-radius: 8px; }
.share-row span, .trash-row__text { flex: 1; min-width: 0; word-break: break-word; }

/* ---------------------------------------------------------------------- */
/* Administration                                                           */
/* ---------------------------------------------------------------------- */
.table-wrap { overflow-x: auto; background: var(--color-surface); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.admin-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.admin-table th, .admin-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--color-border); }
.admin-table th { font-size: 0.75rem; text-transform: uppercase; color: var(--color-text-muted); }
.admin-table__actions { display: flex; gap: 2px; white-space: nowrap; }
.status-badge { padding: 3px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.status-badge--active { background: #e8f8ee; color: var(--color-success); }
.status-badge--inactive { background: var(--color-danger-bg); color: var(--color-danger); }

/* ---------------------------------------------------------------------- */
/* Toasts                                                                   */
/* ---------------------------------------------------------------------- */
.toast-container {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
    z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center;
    pointer-events: none; width: 100%; padding: 0 16px;
}
.toast {
    background: var(--color-primary); color: #fff; padding: 10px 18px; border-radius: 999px;
    box-shadow: var(--shadow-md); opacity: 0; transform: translateY(10px); transition: all 0.25s ease;
    font-size: 0.9rem; max-width: 90vw; text-align: center;
}
.toast--visible { opacity: 1; transform: translateY(0); }
.toast--error { background: var(--color-danger); }

/* ---------------------------------------------------------------------- */
/* Responsive: Tablet / Smartphone                                          */
/* ---------------------------------------------------------------------- */
@media (max-width: 720px) {
    .app-header__name { display: none; }
    .list-toolbar__actions { width: 100%; justify-content: flex-start; }
    .list-toolbar__actions .btn { flex: 1 1 auto; justify-content: center; }
    .new-item-form { flex-direction: column; }
    .new-item-form input[type="text"] { flex: 1 1 auto; }
    .item-row { flex-wrap: wrap; }
    .item-row__content { order: 5; flex-basis: 100%; }
    .item-row__actions { margin-left: auto; }
}

@media (max-width: 420px) {
    .app-main { padding: 14px 10px 80px; }
    .modal { padding: 18px; border-radius: 10px; }
}