/* --- CSS Variables & Design System --- */
:root {
    --bg-main: #0a0a0f;
    --bg-surface: rgba(18, 18, 30, 0.7);
    --bg-surface-hover: rgba(26, 26, 42, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    --primary-color: #6366f1; /* Indigo */
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.3);
    
    --success-color: #10b981; /* Emerald */
    --success-bg: rgba(16, 185, 129, 0.1);
    
    --warning-color: #f59e0b; /* Amber */
    --warning-bg: rgba(245, 158, 11, 0.1);
    
    --danger-color: #ef4444; /* Rose */
    --danger-hover: #dc2626;
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-display: 'Outfit', var(--font-sans);
    
    --sidebar-width: 260px;
    --border-radius-lg: 16px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* --- Background Glow Effects --- */
#glow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.sphere-1 {
    top: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
}

.sphere-2 {
    bottom: -15%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, #8b5cf6 0%, transparent 70%);
}

/* --- Common Components & UI Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--border-hover);
}

.btn-danger {
    background-color: var(--danger-color);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 0.85rem 2rem;
    font-size: 1.05rem;
    border-radius: var(--border-radius-md);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-error {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--danger-color);
}

.badge-success {
    background-color: var(--success-bg);
    color: var(--success-color);
}

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning-color);
}

/* --- Screens & Navigation logic --- */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: block;
}

/* --- Authorization Page --- */
#auth-screen {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

#auth-screen.active {
    display: flex;
}

.auth-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 440px;
    padding: 2.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.75rem;
    color: #ffffff;
    display: block;
    margin-bottom: 0.75rem;
    letter-spacing: -0.5px;
}

.auth-header h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 0.25rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.tab-btn.active {
    background: var(--primary-color);
    color: #ffffff;
}

.auth-form {
    display: none;
}

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

/* Forms general styling */
.input-group {
    margin-bottom: 1.25rem;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.input-group input[type="text"],
.input-group input[type="password"],
.input-group input[type="datetime-local"],
.input-group textarea,
.input-group select {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

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

.input-readonly {
    opacity: 0.6;
    cursor: not-allowed;
}

.input-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.error-msg {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    min-height: 1.2rem;
}

.success-msg {
    color: var(--success-color);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    min-height: 1.2rem;
}

/* --- APP LAYOUT --- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    z-index: 10;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.logo-icon {
    font-size: 1.8rem;
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.35rem;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-smooth);
    gap: 0.75rem;
}

.nav-item:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.04);
}

.nav-item.active {
    color: #ffffff;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.25);
}

.nav-item .badge {
    margin-left: auto;
}

.sidebar-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #ffffff;
    font-family: var(--font-display);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.btn-logout {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-logout:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 3rem;
    min-height: 100vh;
    max-width: 1200px;
}

.app-view {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.app-view.active {
    display: block;
}

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

.view-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2.5rem;
}

.view-header h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 2.25rem;
    color: #ffffff;
    letter-spacing: -0.5px;
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* --- STATS CARDS --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.icon-blue { background: rgba(99, 102, 241, 0.1); color: var(--primary-color); }
.icon-green { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.icon-purple { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }

.stat-data {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.75rem;
    color: #ffffff;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* --- TASKS CONTAINER & LIST --- */
.tasks-container {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.75rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-buttons {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 0.25rem;
    border: 1px solid var(--border-color);
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.filter-btn.active {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

.search-box input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    width: 240px;
    transition: var(--transition-smooth);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    width: 280px;
}

/* Task Cards */
.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.task-item {
    display: flex;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 1.15rem;
    border-radius: var(--border-radius-md);
    transition: var(--transition-smooth);
    gap: 1rem;
}

.task-item:hover {
    background: rgba(255, 255, 255, 0.04);
    transform: translateX(4px);
    border-color: var(--border-hover);
}

/* Custom Checkbox Design */
.checkbox-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    margin-top: 2px;
}

.checkbox-wrapper input[type="checkbox"] {
    opacity: 0;
    position: absolute;
    width: 0;
    height: 0;
}

.checkbox-custom {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border-hover);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    background: transparent;
}

.checkbox-wrapper:hover .checkbox-custom {
    border-color: var(--primary-color);
    box-shadow: 0 0 8px var(--primary-glow);
}

.checkbox-wrapper input:checked + .checkbox-custom {
    background: var(--success-color);
    border-color: var(--success-color);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

.checkbox-custom::after {
    content: "";
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-bottom: 2px;
}

.checkbox-wrapper input:checked + .checkbox-custom::after {
    transform: rotate(45deg) scale(1);
}

/* Task Info Styling */
.task-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.task-title {
    font-weight: 600;
    font-size: 1.05rem;
    color: #ffffff;
    margin-bottom: 0.25rem;
    transition: var(--transition-smooth);
}

.task-item.completed .task-title {
    color: var(--text-muted);
    text-decoration: line-through;
}

.task-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.task-item.completed .task-desc {
    color: var(--text-muted);
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.meta-item {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.meta-due {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.meta-due.overdue {
    background: var(--danger-color);
    color: #ffffff;
    border: none;
}

.meta-reminder {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.task-actions {
    display: flex;
    gap: 0.25rem;
}

.action-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.4rem;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

.action-btn.btn-delete:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

/* Empty State styling */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-family: var(--font-display);
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 0.9rem;
    max-width: 320px;
    margin: 0 auto;
}

/* --- TELEGRAM VIEWS --- */
.telegram-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
}

.tg-status-banner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--border-radius-md);
    margin-bottom: 2rem;
}

.tg-status-icon {
    font-size: 2.5rem;
}

.tg-status-details {
    flex: 1;
}

.tg-status-details h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.tg-status-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tg-setup-instructions h3 {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.instructions-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.instructions-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-num {
    background: var(--primary-color);
    color: #ffffff;
    font-family: var(--font-display);
    font-weight: 800;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.instructions-list li p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding-top: 2px;
}

.linked-info-box {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 1.25rem;
    border-radius: var(--border-radius-md);
    margin-bottom: 1.5rem;
}

.linked-info-box p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.linked-info-box p:last-child {
    margin-bottom: 0;
}

.notice {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.tg-actions {
    display: flex;
    gap: 1rem;
}

/* --- ADMIN PANEL TABLES --- */
.admin-users-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin-top: 2rem;
}

.admin-users-card h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.users-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.users-table th {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--text-secondary);
    padding: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.users-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

.users-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* --- MODAL OVERLAYS & CONTAINER --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    animation: fadeIn 0.25s ease-out;
}

.modal-overlay.active {
    display: flex;
}

.modal-card {
    background: #12121e;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 520px;
    padding: 2.25rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleUp {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.75rem;
}

.modal-header h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    color: #ffffff;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-smooth);
}

.modal-close:hover {
    color: #ffffff;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.col {
    flex: 1;
}

.reminder-toggle-section {
    margin-bottom: 1.25rem;
    padding-top: 0.5rem;
}

/* Switch styling */
.toggle-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    gap: 0.75rem;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.toggle-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 2rem;
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 900px) {
    .sidebar {
        width: 70px;
        padding: 2rem 0.5rem;
        align-items: center;
    }
    
    .logo-text, .nav-label, .user-info, .sidebar-footer::after {
        display: none;
    }
    
    .sidebar-brand {
        justify-content: center;
        margin-bottom: 2.5rem;
    }
    
    .nav-item {
        justify-content: center;
        padding: 0.75rem;
        border-radius: 50%;
    }
    
    .nav-item .badge {
        display: none;
    }
    
    .sidebar-footer {
        flex-direction: column;
        gap: 1rem;
        border-top: none;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 2rem;
    }
}

@media (max-width: 600px) {
    .view-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .view-header .btn {
        width: 100%;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .search-box input:focus {
        width: 100%;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .modal-card {
        padding: 1.5rem;
    }
    
    .tg-actions {
        flex-direction: column;
    }
}

/* --- CALENDAR VIEW STYLES --- */
.calendar-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.75rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.calendar-nav h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    color: #ffffff;
    font-weight: 700;
}

.calendar-grid-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-weight: 600;
    font-family: var(--font-display);
    color: var(--text-secondary);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.calendar-grid-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-auto-rows: minmax(90px, auto);
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
}

.calendar-day-cell {
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.01);
    transition: var(--transition-smooth);
    min-height: 90px;
    display: flex;
    flex-direction: column;
}

.calendar-day-cell:hover {
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
}

.calendar-day-cell.other-month {
    opacity: 0.3;
}

.calendar-day-cell.today {
    background: rgba(99, 102, 241, 0.05);
    box-shadow: inset 0 0 10px rgba(99, 102, 241, 0.1);
}

.calendar-day-cell.today .day-number {
    background: var(--primary-color);
    color: #ffffff;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.day-number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
    align-self: flex-start;
}

.calendar-day-tasks {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow-y: auto;
    flex: 1;
}

.calendar-task-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    background: var(--primary-color);
    color: #ffffff;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    max-width: 100%;
    font-weight: 500;
}

.calendar-task-badge.completed {
    background: var(--success-bg);
    color: var(--success-color);
    text-decoration: line-through;
    opacity: 0.7;
}

/* --- GROUPS VIEW STYLES --- */
.groups-layout {
    display: flex;
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    min-height: 520px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.groups-sidebar {
    width: 240px;
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.groups-sidebar h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: #ffffff;
}

.groups-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
}

.group-item-btn {
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.group-item-btn:hover {
    background: rgba(255, 255, 255, 0.04);
    color: #ffffff;
}

.group-item-btn.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.25);
    color: #ffffff;
}

.group-detail-panel {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.group-detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.group-detail-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: #ffffff;
    font-weight: 700;
}

.group-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.group-members-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.group-member-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 0.65rem 0.85rem;
    border-radius: var(--border-radius-sm);
}

.member-name {
    font-weight: 500;
    font-size: 0.9rem;
}

.btn-remove-member {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.btn-remove-member:hover {
    color: var(--danger-color);
}

.member-invite-box {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
}

.member-invite-box h4 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    color: #ffffff;
}

@media (max-width: 800px) {
    .groups-layout {
        flex-direction: column;
    }
    
    .groups-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .group-grid {
        grid-template-columns: 1fr;
    }
}