/* CSS Design System & Stylesheet for Team TaskFlow */

/* 1. ROOT DESIGN SYSTEM VARIABLES */
:root[data-theme="light"] {
    --bg-primary: #f0f3f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8fafc;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(200, 210, 230, 0.5);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --primary: #5850ec;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(88, 80, 236, 0.15);
    
    --success: #10b981;
    --success-bg: #ecfdf5;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --todo-color: #3b82f6;
    --todo-bg: #eff6ff;

    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    --header-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
    --sidebar-border: #e2e8f0;
}

:root[data-theme="dark"] {
    --bg-primary: #0b0f19;
    --bg-secondary: #131a2b;
    --bg-tertiary: #1e293b;
    --glass-bg: rgba(19, 26, 43, 0.8);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.25);
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #f43f5e;
    --danger-bg: rgba(244, 63, 94, 0.1);
    --todo-color: #38bdf8;
    --todo-bg: rgba(56, 189, 248, 0.1);

    --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    --header-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --sidebar-border: #1e293b;
}

/* 2. BASE STYLES & RESET */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Outfit', sans-serif;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* 3. APP LAYOUT */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.app-header {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--header-shadow);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary), #818cf8);
    color: #ffffff;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.35);
}

.logo-text h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.1;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.ctrl-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--card-shadow);
}

.ctrl-btn:hover {
    background: var(--glass-border);
    transform: translateY(-2px);
}

.role-selector-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-tertiary);
    padding: 0.4rem 0.8rem;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
}

.role-selector-wrapper label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.role-select {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
    padding-right: 0.5rem;
}

.role-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* 4. CONTENT SECTIONS & PANEL SWITCHING */
.app-main {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

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

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

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

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.panel-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-border);
}

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

.btn-danger:hover {
    background: #e11d48;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    cursor: pointer;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.btn-icon:hover {
    background: var(--primary);
    color: #ffffff;
}

.btn-icon.edit:hover {
    background: var(--warning);
    color: #ffffff;
}

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

/* 5. STATS WIDGETS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.stat-card.total::before { background-color: var(--primary); }
.stat-card.pending::before { background-color: var(--warning); }
.stat-card.completed::before { background-color: var(--success); }
.stat-card.overdue::before { background-color: var(--danger); }

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-card.total .stat-icon { background: rgba(99, 102, 241, 0.12); color: var(--primary); }
.stat-card.pending .stat-icon { background: rgba(245, 158, 11, 0.12); color: var(--warning); }
.stat-card.completed .stat-icon { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.stat-card.overdue .stat-icon { background: rgba(244, 63, 94, 0.12); color: var(--danger); }

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

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

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    line-height: 1.2;
}

/* 6. CHARTS CONTAINER */
.charts-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

@media (max-width: 992px) {
    .charts-container {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
}

.chart-card h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chart-wrapper {
    position: relative;
    height: 300px;
    width: 100%;
}

/* 7. TABLES STYLING */
.team-overview-section, .global-tasks-section {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    margin-bottom: 2.5rem;
}

.team-overview-section h3, .global-tasks-section h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.section-header h3 {
    margin-bottom: 0;
}

.filters-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.search-box input {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem 0.5rem 2.2rem;
    border-radius: 8px;
    font-size: 0.85rem;
    width: 240px;
    outline: none;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.filter-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    font-weight: 500;
}

.filter-select:focus {
    border-color: var(--primary);
}

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

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

th {
    padding: 0.85rem 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-primary);
}

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

/* Table elements detail styling */
.tr-hover:hover {
    background-color: rgba(99, 102, 241, 0.02);
}

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

.avatar-small {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: #ffffff;
}

.progress-bar-container {
    width: 100px;
    background: var(--bg-tertiary);
    height: 6px;
    border-radius: 3px;
    overflow: hidden;
    display: inline-block;
    vertical-align: middle;
    margin-right: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--success);
    border-radius: 3px;
    width: 0%;
    transition: width 0.6s ease;
}

/* Badge Tags styling */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge.todo { background-color: var(--todo-bg); color: var(--todo-color); }
.badge.inprogress { background-color: var(--warning-bg); color: var(--warning); }
.badge.done { background-color: var(--success-bg); color: var(--success); }
.badge.overdue { background-color: var(--danger-bg); color: var(--danger); animation: pulse 2s infinite; }

.badge.high { background-color: var(--danger-bg); color: var(--danger); }
.badge.medium { background-color: var(--warning-bg); color: var(--warning); }
.badge.low { background-color: var(--todo-bg); color: var(--todo-color); }

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    70% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

/* 8. TEAM MEMBER VIEW DETAILS */
.member-profile-header {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.profile-info {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.profile-avatar {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), #818cf8);
    color: #ffffff;
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    box-shadow: 0 6px 15px rgba(99, 102, 241, 0.3);
}

.profile-info h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
}

.profile-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.member-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* 9. KANBAN BOARD STYLING */
.kanban-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 900px) {
    .kanban-board {
        grid-template-columns: 1fr;
    }
}

.kanban-column {
    background-color: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.25rem;
    min-height: 500px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--card-shadow);
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--bg-primary);
}

.column-title {
    font-weight: 700;
    font-size: 1rem;
    font-family: 'Outfit', sans-serif;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.text-todo { color: var(--todo-color); }
.text-inprogress { color: var(--warning); }
.text-done { color: var(--success); }

.column-count {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.2rem 0.6rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 700;
}

.kanban-cards-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 400px;
    transition: background-color 0.2s ease, border-style 0.2s ease;
    border-radius: 8px;
    padding: 0.25rem;
}

/* Drag hover indicators */
.kanban-cards-container.drag-over {
    background-color: rgba(99, 102, 241, 0.05);
    outline: 2px dashed var(--primary);
    outline-offset: 4px;
}

/* Task Cards */
.task-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.25rem;
    cursor: grab;
    position: relative;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.task-card:active {
    cursor: grabbing;
}

.task-card.dragging {
    opacity: 0.4;
    transform: scale(0.98);
}

.task-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--card-shadow);
    border-color: rgba(99, 102, 241, 0.3);
}

.task-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
}

.task-card-header h4 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.3;
}

.task-card-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.task-card:hover .task-card-actions {
    opacity: 1;
}

.task-card-desc {
    font-size: 0.825rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--glass-border);
    padding-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.task-date {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 500;
}

.task-date.overdue {
    color: var(--danger);
    font-weight: 600;
}

.task-member-badge {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.7rem;
}

/* 10. MODAL STYLING */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
    animation: modalFadeIn 0.3s forwards;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    width: 90%;
    max-width: 550px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.modal-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.75rem;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.required {
    color: var(--danger);
}

input[type="text"], select, textarea, input[type="date"] {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
    width: 100%;
}

input[type="text"]:focus, select:focus, textarea:focus, input[type="date"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

textarea {
    resize: vertical;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.75rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 1.25rem;
}