/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #1a1f2e;
    --bg-card: #242938;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --border: #374151;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Login Screen */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0a0e1a 0%, #1a1f2e 100%);
}

.login-box {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.login-box h1 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

#loginForm input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1rem;
    transition: border-color 0.3s;
}

#loginForm input:focus {
    outline: none;
    border-color: var(--accent);
}

#loginForm button {
    width: 100%;
    padding: 1rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

#loginForm button:hover {
    background: var(--accent-hover);
}

.error-msg {
    color: var(--error);
    text-align: center;
    margin-top: 1rem;
    font-size: 0.875rem;
}

/* Dashboard Container */
.dashboard-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.dashboard-header {
    background: var(--bg-secondary);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-left h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.status-badge {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.logout-btn {
    padding: 0.5rem 1rem;
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s;
}

.logout-btn:hover {
    background: var(--error);
    color: white;
}

/* Main Content */
.dashboard-main {
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    font-size: 2.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Categories */
.categories-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.category-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
}

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

.category-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.add-btn {
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background 0.3s;
}

.add-btn:hover {
    background: var(--accent-hover);
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.empty-state small {
    font-size: 0.75rem;
    opacity: 0.7;
}

.task-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: start;
    transition: transform 0.2s;
}

.task-item:hover {
    transform: translateX(4px);
}

.task-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.task-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.task-status {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.task-status.pending { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.task-status.active { background: rgba(34, 197, 94, 0.1); color: var(--success); }
.task-status.completed { background: rgba(99, 102, 241, 0.1); color: var(--accent); }
.task-status.error { background: rgba(239, 68, 68, 0.1); color: var(--error); }

.task-actions {
    display: flex;
    gap: 0.5rem;
}

.task-actions button {
    padding: 0.25rem 0.5rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    transition: all 0.2s;
}

.task-actions button:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Activity Log */
.activity-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.activity-section h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.activity-log {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 0.875rem;
}

.activity-time {
    color: var(--text-secondary);
    min-width: 80px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    border: 1px solid var(--border);
}

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

.modal-header h3 {
    font-size: 1.25rem;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

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

#taskForm {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.form-actions button {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-cancel {
    background: transparent;
    border: 1px solid var(--border) !important;
    color: var(--text-secondary);
}

.btn-cancel:hover {
    background: var(--bg-secondary);
}

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

.btn-submit:hover {
    background: var(--accent-hover);
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .categories-container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}