:root {
    /* Accent color will be injected dynamically based on logo */
    --accent-color: #0066cc;
    --accent-light: #4d94ff;
    --accent-dark: #004499;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-gray: #f8f9fa;
    --dark-gray: #343a40;
    --border-color: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 8px rgba(0,0,0,0.15);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--light-gray);
    color: var(--text-color);
    line-height: 1.6;
}

/* Login Page Styles */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

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

.login-logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin-bottom: 20px;
    object-fit: cover;
}

.login-header h2 {
    margin: 0 0 10px 0;
    color: var(--accent-color);
    font-size: 24px;
}

.login-header p {
    margin: 0;
    color: var(--text-muted);
    font-size: 14px;
}

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

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.login-form input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.error-message {
    background: var(--danger-color);
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

/* Main Layout */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background: var(--accent-color);
    color: white;
    padding: 20px;
    box-sizing: border-box;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.sidebar-logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-bottom: 15px;
    object-fit: cover;
}

.sidebar h2 {
    margin: 0 0 10px 0;
    font-size: 20px;
    font-weight: 600;
}

.sidebar p {
    margin: 0;
    font-size: 14px;
    opacity: 0.8;
}

.sidebar nav {
    margin-bottom: 30px;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    color: white;
    text-decoration: none;
    padding: 12px 16px;
    margin: 8px 0;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.sidebar nav a:hover {
    background: rgba(255,255,255,0.1);
    transform: translateX(5px);
}

.sidebar nav a.active {
    background: rgba(255,255,255,0.2);
    font-weight: 600;
}

.sidebar nav a i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
}

.content {
    margin-left: 280px;
    padding: 20px;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
    margin: 0;
    color: var(--accent-color);
    font-size: 28px;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

/* Notifications */
.notification-container {
    position: relative;
    display: inline-block;
}

.notification-bell {
    position: relative;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.notification-bell:hover {
    background: var(--light-gray);
}

.notification-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.notification-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    width: 350px;
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
}

.notification-dropdown.show {
    display: block;
}

.notification-item {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.notification-item:hover {
    background: var(--light-gray);
}

.notification-item:last-child {
    border-bottom: none;
}

.notification-title {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-color);
}

.notification-message {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.notification-time {
    font-size: 12px;
    color: var(--text-muted);
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 25px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    margin: 0;
    color: var(--accent-color);
    font-size: 20px;
    font-weight: 600;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    gap: 8px;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-warning {
    background: var(--warning-color);
    color: var(--dark-gray);
}

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

.btn-info {
    background: var(--info-color);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-outline:hover {
    background: var(--accent-color);
    color: white;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--light-gray);
    font-weight: 600;
    color: var(--text-color);
}

.table tr:hover {
    background: var(--light-gray);
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

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

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

.badge-danger {
    background: var(--danger-color);
    color: white;
}

.badge-info {
    background: var(--info-color);
    color: white;
}

.badge-secondary {
    background: var(--text-muted);
    color: white;
}

/* Task styles */
.task-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.task-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.task-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 5px 0;
}

.task-meta {
    display: flex;
    gap: 15px;
    font-size: 14px;
    color: var(--text-muted);
}

.task-description {
    color: var(--text-muted);
    margin-bottom: 15px;
    line-height: 1.5;
}

.task-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.task-assignees {
    display: flex;
    gap: 5px;
}

.assignee-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
}

/* Grid layouts */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Stats cards */
.stats-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.stats-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.stats-label {
    color: var(--text-muted);
    font-size: 14px;
    text-transform: uppercase;
    font-weight: 600;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .content {
        margin-left: 0;
        padding: 15px;
    }
    
    .page-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 14px;
    }
    
    .table th,
    .table td {
        padding: 8px 12px;
    }
    
    .task-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .task-footer {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }
    
    .card {
        padding: 20px 15px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Loading spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}