:root {
    --bg: #1e1e2e;
    --bg-alt: #2d3748;
    --panel: #374151;
    --panel-alt: #1f2937;
    --panel-border: #4b5563;
    --panel-border-alt: #374151;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --accent: #60a5fa;
    --accent-grad: linear-gradient(45deg,#3b82f6,#60a5fa);
    --danger-grad: linear-gradient(45deg,#dc2626,#ef4444);
    --warn-grad: linear-gradient(45deg,#f59e0b,#fbbf24);
    --success-grad: linear-gradient(45deg,#059669,#10b981);
    --neutral-grad: linear-gradient(45deg,#6b7280,#9ca3af);
    --purple-grad: linear-gradient(45deg,#7c3aed,#a855f7);
    --radius: 12px;
    --transition: 0.25s cubic-bezier(.4,.2,.2,1);
    --topbar-height: 72px;
    --z-login: 500;
    --z-sidebar: 400;
    --z-topbar: 450;
    --z-fab: 650;
    --z-modal: 700;
    --z-notification: 800;
}

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

body {
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
    background:radial-gradient(circle at 20% 20%, #243042 0%, #1e1e2e 55%, #161b26 100%);
    color:var(--text);
    min-height:100vh;
    padding:0;
    line-height:1.5;
    position: relative;
}

/* Login Styles */
.login-container {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-login);
}

.login-box {
    background: linear-gradient(160deg,rgba(31,41,55,0.96),rgba(23,30,41,0.94));
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--panel-border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--accent-grad);
    border-radius: 16px;
    margin-bottom: 16px;
    color: white;
    box-shadow: 0 8px 24px rgba(96,165,250,0.3);
}

.login-header h1 {
    color: var(--accent);
    font-size: 2rem;
    margin-bottom: 0;
    font-weight: 700;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
}

.form-input, .form-select, textarea.form-input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    background: rgba(55,65,81,0.55);
    color: var(--text);
    font-size: 16px;
    transition: var(--transition);
    box-shadow: 0 0 0 1px rgba(255,255,255,0.03) inset;
}

.form-input:focus, .form-select:focus, textarea.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(96,165,250,0.15);
    background: rgba(66,80,104,0.75);
}

textarea.form-input {
    resize: vertical;
    min-height: 130px;
    line-height: 1.5;
}

.btn {
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg,rgba(55,65,81,0.75),rgba(31,41,55,0.75));
    color: var(--text);
    border: 1px solid var(--panel-border);
    box-shadow: 0 4px 14px -4px rgba(0,0,0,0.55);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px -4px rgba(0,0,0,0.65);
}

.btn-primary {
    background: var(--accent-grad);
    color: white;
    border: none;
    box-shadow: 0 6px 20px -4px rgba(59,130,246,0.4);
    width: 100%;
}

.btn-primary:hover {
    box-shadow: 0 8px 25px -4px rgba(59,130,246,0.6);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: linear-gradient(135deg,rgba(55,65,81,0.55),rgba(31,41,55,0.55));
    color: var(--text);
}

/* App Styles */
.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.sidebar {
    width: 280px;
    background: linear-gradient(160deg, rgba(31,41,55,0.96), rgba(23,30,41,0.94));
    border-right: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-shadow: 2px 0 10px rgba(0,0,0,0.5);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: var(--z-sidebar);
    transform: translateX(0);
    transition: transform 0.3s ease;
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
    margin: 0;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text);
}

.nav-item.active {
    background: rgba(96,165,250,0.1);
    color: var(--accent);
}

.sidebar-footer {
    border-top: 1px solid var(--panel-border);
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.user-info-sidebar {
    font-size: 0.9rem;
    color: var(--text-dim);
}

.logout-btn-sidebar {
    background: var(--danger-grad);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.logout-btn-sidebar:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(220,38,38,0.3);
}

.main-content {
    flex-grow: 1;
    margin-left: 280px;
    transition: margin-left 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 28px 32px 40px;
}

.main-content.sidebar-collapsed {
    margin-left: 0;
}

.topbar {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 24px 28px;
    min-height: var(--topbar-height);
    background: linear-gradient(110deg,rgba(31,41,55,0.88),rgba(17,24,39,0.82));
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 18px;
    box-shadow: 0 4px 18px -4px rgba(0,0,0,0.55),0 0 0 1px rgba(255,255,255,0.04) inset;
    backdrop-filter: blur(10px);
    z-index: var(--z-topbar);
}

.topbar h1 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--accent);
    font-weight: 700;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar-actions input {
    padding: 8px 12px;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    font-size: 14px;
    width: 250px;
}

.topbar-actions input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(96,165,250,0.2);
}

.header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.header-content h1 {
    color: var(--accent);
    font-size: 2.3rem;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    letter-spacing: 0.5px;
    font-weight: 700;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 10px;
    border-radius: 8px;
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: rgba(255,255,255,0.05);
}

.user-menu {
    display: flex;
    gap: 12px;
    align-items: center;
}

.user-info {
    color: var(--text-dim);
    font-size: 0.85rem;
    padding: 8px 16px;
    background: rgba(55,65,81,0.5);
    border-radius: 24px;
    border: 1px solid var(--panel-border);
}

.logout-btn {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    color: var(--text-dim);
    padding: 8px 16px;
    border-radius: 24px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.logout-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-1px);
}

.controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 26px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 14px 22px;
    background: linear-gradient(135deg,rgba(55,65,81,0.55),rgba(31,41,55,0.55));
    border-radius: 14px;
    border: 1px solid var(--panel-border);
    min-width: 120px;
    box-shadow: 0 4px 12px -4px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.05) inset;
}

.stat-number {
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.75rem;
    color: #9ca3af;
    letter-spacing: .7px;
    text-transform: uppercase;
    margin-top: 5px;
}

.search-box {
    max-width: 460px;
    margin: 0 auto 28px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--panel);
    color: var(--text);
    font-size: 16px;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(96,165,250,0.15);
}

.filter-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid var(--panel-border);
    background: linear-gradient(135deg,rgba(55,65,81,0.35),rgba(31,41,55,0.35));
    color: var(--text);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0,0,0,0.35);
}

.filter-btn.active {
    border-color: var(--accent);
    background: linear-gradient(135deg,rgba(96,165,250,0.25),rgba(59,130,246,0.15));
    color: var(--accent);
    box-shadow: 0 0 0 1px rgba(96,165,250,0.4);
}

.cards-container, .archive-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill,minmax(320px,1fr));
    gap: 18px;
    max-width: 1300px;
    margin: 0 auto;
}

.card {
    background: linear-gradient(145deg,rgba(55,65,81,0.92),rgba(31,41,55,0.85));
    backdrop-filter: blur(4px);
    border-radius: 14px;
    padding: 18px 18px 20px;
    border: 1px solid rgba(255,255,255,0.05);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    box-shadow: 0 6px 22px -6px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.04) inset;
}

.note-card {
    background: linear-gradient(135deg,#fef9c3,#fde68a);
    color: #42330a;
    font-size: 0.95rem;
    min-height: 140px;
    border: 1px solid rgba(0,0,0,0.12);
    box-shadow: 0 6px 18px -6px rgba(0,0,0,0.35),0 2px 0 0 rgba(255,255,255,0.35) inset;
    font-family: "Segoe UI", system-ui, sans-serif;
}

.note-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(-45deg,rgba(255,255,255,0.18) 0 6px,transparent 6px 12px);
    opacity: 0.25;
    pointer-events: none;
}

.note-card:hover {
    transform: rotate(-0.7deg) translateY(-4px);
}

.note-card .note-content {
    position: relative;
    white-space: pre-line;
    line-height: 1.5;
    z-index: 1;
}

.note-card .note-date {
    position: absolute;
    bottom: 10px;
    right: 12px;
    font-size: 0.65rem;
    color: rgba(67,52,10,0.7);
}

.card:hover, .card:focus {
    transform: translateY(-4px);
    box-shadow: 0 14px 38px -8px rgba(0,0,0,0.65), 0 0 0 1px rgba(96,165,250,0.35) inset;
    border-color: var(--accent);
    outline: none;
}

.due-today-badge {
    position: absolute;
    top: 12px;
    right: 14px;
    background: var(--warn-grad);
    color: #fff;
    padding: 3px 8px;
    border-radius: 10px;
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: .4px;
}

.card-type {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 18px;
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: .6px;
    border: 1px solid;
    backdrop-filter: blur(2px);
    box-shadow: 0 0 0 1px rgba(255,255,255,0.1) inset;
}

.card-type.knowledge {
    background: rgba(34,197,94,0.18);
    color: #4ade80;
    border-color: #22c55e;
}

.card-type.task {
    background: rgba(245,158,11,0.18);
    color: #fbbf24;
    border-color: #f59e0b;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: #f1f5f9;
    line-height: 1.35;
    display: flex;
    align-items: center;
    gap: 8px;
}

.type-icon {
    opacity: .9;
    font-size: .95rem;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,.4));
}

.card-preview {
    color: var(--text-dim);
    font-size: 0.86rem;
    line-height: 1.45;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    white-space: pre-line;
}

.card-date {
    position: absolute;
    top: 12px;
    right: 14px;
    font-size: 0.65rem;
    color: #9ca3af;
    letter-spacing: .5px;
}

.status-badge {
    position: absolute;
    top: 10px;
    left: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(0,0,0,0.35);
    padding: 4px 10px;
    border-radius: 16px;
    font-size: .55rem;
    letter-spacing: .5px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.08);
}

.status-badge span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .7rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(5px);
    z-index: var(--z-modal);
    animation: fadeIn .25s ease;
}

@keyframes fadeIn {
    from {opacity: 0}
    to {opacity: 1}
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    background: linear-gradient(160deg,rgba(31,41,55,0.96),rgba(23,30,41,0.94));
    border-radius: 18px;
    padding: 26px 30px 34px;
    width: 90%;
    max-width: 720px;
    max-height: 85vh;
    overflow-y: auto;
    border: 1px solid var(--panel-border-alt);
    box-shadow: 0 26px 70px -10px rgba(0,0,0,0.75), 0 0 0 1px rgba(255,255,255,0.07);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--panel-border-alt);
    position: sticky;
    top: 0;
    background: linear-gradient(160deg,rgba(31,41,55,0.96),rgba(23,30,41,0.94));
    z-index: 5;
}

.modal-header h2 {
    color: #f1f5f9;
    font-size: 1.4rem;
    margin: 0;
}

.close-btn {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    color: #cbd5e1;
    font-size: 18px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.close-btn:hover {
    background: #4b5563;
    color: #fff;
}

.modal-buttons {
    display: flex;
    gap: 10px;
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid var(--panel-border-alt);
    flex-wrap: wrap;
}

.modal-buttons .btn {
    flex: 1;
    justify-content: center;
    padding: 13px 18px;
    font-size: 0.9rem;
}

.delete-btn {
    background: var(--danger-grad);
    color: #fff;
    border: none;
}

.archive-btn {
    background: var(--neutral-grad);
    color: #fff;
    border: none;
}

.complete-btn {
    background: var(--success-grad);
    color: #fff;
    border: none;
}

/* Subtasks */
.subtasks-section {
    margin-top: 14px;
    padding: 14px 16px;
    background: rgba(55,65,81,0.45);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    display: none;
}

.subtasks-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.subtasks-header h3 {
    margin: 0;
    font-size: .85rem;
    letter-spacing: .5px;
    text-transform: uppercase;
    color: var(--text-dim);
}

.subtask-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin: 0 0 10px 0;
    padding: 0;
}

.subtask-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 6px 8px;
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 8px;
    background: linear-gradient(135deg,rgba(55,65,81,0.5),rgba(31,41,55,0.5));
}

.subtask-text {
    flex: 1;
    font-size: .75rem;
    line-height: 1.35;
    background: transparent;
    border: none;
    color: var(--text);
    padding: 2px 4px;
    border-radius: 6px;
    transition: .2s;
}

.subtask-text:focus {
    outline: 2px solid var(--accent);
    background: rgba(96,165,250,0.08);
}

.add-subtask-row {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}

.add-subtask-row input {
    flex: 1;
    padding: 6px 8px;
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    background: rgba(55,65,81,0.5);
    color: var(--text);
    font-size: .7rem;
}

.add-subtask-row button {
    padding: 6px 10px;
    font-size: .7rem;
    border: 1px solid var(--panel-border);
    background: var(--accent-grad);
    color: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

/* Archive */
.archive-section {
    margin-top: 40px;
    border-top: 2px solid var(--panel-border-alt);
    padding-top: 26px;
}

.archive-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 16px;
    cursor: pointer;
    padding: 18px;
    background: rgba(55,65,81,0.35);
    border-radius: 14px;
    border: 2px solid var(--panel-border);
    transition: var(--transition);
    user-select: none;
}

.archive-toggle:hover {
    background: rgba(55,65,81,0.6);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0,0,0,0.35);
}

.archive-toggle h3 {
    color: var(--text);
    margin: 0;
    font-size: 1.05rem;
}

.archive-arrow {
    transition: var(--transition);
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: bold;
}

.archive-arrow.expanded {
    transform: rotate(180deg);
}

.archive-content {
    display: none;
    animation: slideDown .3s ease;
}

.archive-content.show {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Notification System */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(140deg,rgba(31,41,55,0.95),rgba(17,24,39,0.92));
    border: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(6px);
    border-radius: 18px;
    padding: 16px 20px;
    color: var(--text);
    box-shadow: 0 10px 28px -6px rgba(0,0,0,0.65), 0 0 0 1px rgba(255,255,255,0.06) inset;
    z-index: var(--z-notification);
    transform: translateX(420px);
    transition: var(--transition);
    max-width: 380px;
    display: flex;
    gap: 12px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(145deg,rgba(6,78,59,0.95),rgba(5,150,105,0.85));
    border-color: rgba(16,185,129,0.55);
}

.notification.error {
    background: linear-gradient(145deg,rgba(127,29,29,0.95),rgba(220,38,38,0.82));
    border-color: rgba(239,68,68,0.6);
}

.notification.info {
    background: linear-gradient(145deg,rgba(30,58,138,0.95),rgba(37,99,235,0.82));
    border-color: rgba(96,165,250,0.55);
}

/* Loading States */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Dashboard Widgets */
.dashboard-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.widget {
    background: linear-gradient(135deg,rgba(55,65,81,0.55),rgba(31,41,55,0.55));
    border-radius: 14px;
    padding: 20px;
    border: 1px solid var(--panel-border);
    box-shadow: 0 4px 12px -4px rgba(0,0,0,0.55);
}

.widget h3 {
    margin: 0 0 16px 0;
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 600;
}

.recent-items, .open-tasks {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.recent-item, .task-item {
    padding: 10px;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    font-size: 0.9rem;
}

.categories-chart {
    height: 200px;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
}

/* Ergänzungen für neue Struktur */
.app-section {display:none; animation: fadeIn .25s ease;}
.app-section.active {display:block;}
.visually-hidden {position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* Dashboard Widget Veredelung */
.dashboard-widgets .widget {position:relative;overflow:hidden;}
.dashboard-widgets .widget:before {content:"";position:absolute;inset:0;background:radial-gradient(circle at 85% 15%,rgba(96,165,250,0.12),transparent 55%);pointer-events:none;}
.dashboard-widgets .widget h3 {display:flex;align-items:center;gap:8px;}
.dashboard-widgets .widget h3:before {content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(96,165,250,0.25);}

/* Section Header Platzhalter */
.section-header {display:flex;align-items:center;justify-content:space-between;margin:0 0 12px;}

/* Verbesserte Filter-Leiste */
#filterBar {position:sticky;top:calc(var(--topbar-height) + 16px);z-index:var(--z-topbar);background:linear-gradient(135deg,rgba(31,41,55,0.85),rgba(17,24,39,0.85));backdrop-filter:blur(6px);padding:8px 12px;border:1px solid var(--panel-border);border-radius:14px;display:flex;flex-wrap:wrap;gap:8px;}
#filterBar .filter-btn {border:1px solid var(--panel-border);background:rgba(55,65,81,0.45);font-size:.7rem;letter-spacing:.5px;text-transform:uppercase;padding:8px 14px;}
#filterBar .filter-btn.active {background:var(--accent-grad);color:#fff;border-color:transparent;box-shadow:0 4px 14px -4px rgba(59,130,246,0.5);}

/* Archiv statischer Header */
#archiveStaticHeader {cursor:default;}
#archiveStaticHeader:hover {transform:none;box-shadow:none;background:rgba(55,65,81,0.35);border-color:var(--panel-border);}

/* Karten Feinschliff */
.card {outline:none;}
.card:focus-visible {border-color:var(--accent);box-shadow:0 0 0 2px rgba(96,165,250,0.4);}

/* Topbar Fix & leichte Verbesserung */
.topbar #pageTitle {flex:1;font-size:1.35rem;display:flex;align-items:center;gap:10px;}
.topbar #pageTitle:before {content:"";width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 6px rgba(96,165,250,0.15);}
.sidebar-toggle {display:inline-flex;}

/* Einheitliche Button Skins */
.btn, .filter-btn {position:relative;overflow:hidden;}
.btn:before, .filter-btn:before {content:"";position:absolute;inset:0;background:linear-gradient(140deg,rgba(255,255,255,0.08),transparent);opacity:0;transition:var(--transition);}
.btn:hover:before, .filter-btn:hover:before {opacity:1;}
.btn-primary {background:var(--accent-grad);border:none;}
.btn-secondary {background:linear-gradient(135deg,rgba(55,65,81,0.65),rgba(31,41,55,0.65));}

/* FAB / Chat Fixes */
/* Reset frühere harte Overrides und an UI anpassen */
.fab-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    z-index: var(--z-fab);
}

.main-fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg,rgba(55,65,81,0.92),rgba(31,41,55,0.84));
    color: var(--accent);
    border: 1px solid rgba(96,165,250,0.35);
    box-shadow: 0 10px 26px -8px rgba(59,130,246,0.45),0 0 0 1px rgba(96,165,250,0.28) inset;
    backdrop-filter: blur(10px);
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.main-fab:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 32px -10px rgba(59,130,246,0.6),0 0 0 1px rgba(96,165,250,0.32) inset;
}

.fab-menu {
    position: absolute;
    bottom: 4px;
    right: 68px;
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(16px) scale(0.9);
    pointer-events: none;
    transition: opacity 0.35s var(--transition), transform 0.35s var(--transition), visibility 0.35s linear;
}

.fab-menu.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0) scale(1);
}

.fab-item {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg,rgba(55,65,81,0.9),rgba(31,41,55,0.8));
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--accent);
    box-shadow: 0 10px 22px -8px rgba(0,0,0,0.45),0 0 0 1px rgba(255,255,255,0.04) inset;
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateX(14px) scale(0.9);
    transition: opacity 0.35s var(--transition), transform 0.35s var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.fab-menu.show .fab-item {
    opacity: 1;
    transform: translateX(0) scale(1);
}

.fab-menu.show .fab-item:nth-child(1) { transition-delay: 0.04s; }
.fab-menu.show .fab-item:nth-child(2) { transition-delay: 0.08s; }
.fab-menu.show .fab-item:nth-child(3) { transition-delay: 0.12s; }

.fab-item:hover {
    box-shadow: 0 14px 28px -10px rgba(59,130,246,0.55),0 0 0 1px rgba(96,165,250,0.3) inset;
}

.chat-fab {
    position: fixed;
    bottom: 110px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg,rgba(6,78,59,0.94),rgba(5,150,105,0.78));
    color: #10b981;
    border: 1px solid rgba(16,185,129,0.45);
    box-shadow: 0 12px 28px -8px rgba(16,185,129,0.45),0 0 0 1px rgba(16,185,129,0.25) inset;
    backdrop-filter: blur(10px);
    z-index: var(--z-fab);
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.chat-fab:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 36px -10px rgba(16,185,129,0.55),0 0 0 1px rgba(16,185,129,0.3) inset;
}

.main-fab svg,
.fab-item svg,
.chat-fab svg {
    stroke: currentColor;
    fill: none;
}

.chat-fab:focus-visible,
.main-fab:focus-visible,
.fab-item:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

@media (max-width: 1024px) {
    .app-container {flex-direction: column;}
    .sidebar {
        transform: translateX(-100%);
        width: 260px;
        box-shadow: 0 16px 40px -16px rgba(0,0,0,0.55);
    }
    .sidebar.open {transform: translateX(0);}
    .main-content {
        margin-left: 0;
        padding: 24px 20px 36px;
    }
    .main-content.sidebar-collapsed {margin-left: 0;}
    #filterBar {top: calc(var(--topbar-height) + 12px);}
}

@media (max-width: 640px) {
    .cards-container, .archive-cards {
        grid-template-columns: repeat(auto-fill,minmax(240px,1fr));
    }
    .stats {flex-direction: column; align-items: stretch;}
    .main-fab, .chat-fab {width: 52px; height: 52px;}
    .fab-menu {right: 60px; gap: 10px;}
    .fab-item {width: 44px; height: 44px;}
    .fab-container {right: 20px; bottom: 24px;}
    .chat-fab {right: 20px; bottom: 96px;}
}