/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #10b981;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
    --gray-color: #9ca3af;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    background-color: #f9fafb;
    color: var(--dark-color);
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

.hidden {
    display: none !important;
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--light-color);
    color: var(--dark-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

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

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

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

.btn-success:hover {
    background-color: #0ca678;
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

/* App Container */
.app-container {
    min-height: 100vh;
    width: 100%;
}

/* Authentication Section */
.auth-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f3f4f6;
    background-image: linear-gradient(135deg, #4f46e5 0%, #10b981 100%);
}

.auth-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    width: 100%;
    max-width: 450px;
    text-align: center;
}

.auth-container h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.auth-form {
    text-align: left;
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.auth-form button {
    width: 100%;
    margin-top: 1rem;
}

.auth-form p {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.logo h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--dark-color);
    font-weight: 500;
    position: relative;
}

.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-menu span {
    font-weight: 500;
}

/* Main Content Area */
.main-content {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.view {
    animation: fadeIn 0.3s ease;
}

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

/* Today View */
.daily-goal-section {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.daily-goal-container {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

#daily-goal {
    flex-grow: 1;
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    min-height: 100px;
    resize: vertical;
    font-size: 1rem;
    transition: var(--transition);
}

#daily-goal:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.tasks-pomodoro-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Tasks Section */
.tasks-section {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.task-input-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

#new-task {
    flex-grow: 1;
    padding: 0.75rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

#new-task:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.task-list {
    list-style-type: none;
}

.task-list li {
    padding: 1rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-list li:last-child {
    border-bottom: none;
}

.task-list .task-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.task-list .task-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.task-list .task-text {
    margin: 0;
    transition: var(--transition);
}

.task-list .task-completed .task-text {
    text-decoration: line-through;
    color: var(--gray-color);
}

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

.task-list .task-actions button {
    padding: 0.25rem;
    background: none;
    border: none;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

.task-list .task-actions .btn-edit:hover {
    color: var(--primary-color);
}

.task-list .task-actions .btn-delete:hover {
    color: var(--danger-color);
}

/* Pomodoro Section */
.pomodoro-section {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.timer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.timer-display {
    font-size: 5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.timer-mode {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.timer-controls {
    display: flex;
    gap: 1rem;
}

.timer-controls button {
    width: 60px;
    height: 60px;
    font-size: 1.25rem;
}

.pomodoro-stats {
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--gray-color);
}

/* Analytics View */
.analytics-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.analytics-card {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.analytics-card:first-child {
    grid-column: 1 / -1;
}

.chart-container {
    height: 300px;
    margin-top: 1.5rem;
}

.stats-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background-color: #f9fafb;
    border-radius: var(--border-radius);
}

.stat-label {
    font-weight: 500;
}

.stat-value {
    font-weight: 600;
    color: var(--primary-color);
}

/* Settings View */
.settings-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.settings-section {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.setting-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.setting-item label {
    font-weight: 500;
}

.setting-item input[type="number"] {
    width: 80px;
    padding: 0.5rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    text-align: center;
}

.setting-item input[type="text"] {
    width: 250px;
    padding: 0.5rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
}

.setting-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .tasks-pomodoro-container {
        grid-template-columns: 1fr;
    }
    
    .analytics-container {
        grid-template-columns: 1fr;
    }
    
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        width: 100%;
        justify-content: space-between;
    }
    
    .user-menu {
        width: 100%;
        justify-content: space-between;
        margin-top: 1rem;
    }
}

@media (max-width: 480px) {
    .timer-display {
        font-size: 3.5rem;
    }
    
    .daily-goal-container {
        flex-direction: column;
    }
    
    #daily-goal {
        width: 100%;
    }
    
    .daily-goal-container button {
        width: 100%;
    }
}