/* CSS Custom Properties */
:root {
    --primary-color: #154E9B;
    --secondary-color: #4784F1;
    --bg-gradient: linear-gradient(135deg, #154E9B 0%, #4784F1 100%);
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --text-light: #ffffff;
    --border-color: #e0e0e0;
    --shadow-light: 0 2px 8px rgba(21, 78, 155, 0.08);
    --shadow-medium: 0 4px 16px rgba(21, 78, 155, 0.12);
    --shadow-heavy: 0 8px 32px rgba(21, 78, 155, 0.16);
    --border-radius: 12px;
    --border-radius-small: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Category Colors */
    --category-work: #154E9B;
    --category-personal: #10ac84;
    --category-learning: #ff6b6b;
    --category-health: #4834d4;
    --category-creative: #ff9ff3;
    --category-meetings: #3742fa;
    --category-finance: #2ed573;
    --category-household: #ffa502;
    --category-fitness: #ff4757;
    --category-social: #5f27cd;
    --category-travel: #00d2d3;
    --category-entertainment: #ff3838;
    --category-selfcare: #ff6348;
    --category-volunteering: #7bed9f;
    --category-parenting: #70a1ff;
    --category-sidehustle: #ff5252;
    --category-study: #6c5ce7;
    --category-admin: #a4b0be;
    --category-break: #2f3542;
    --category-spiritual: #8e44ad;
    --category-other: #686de0;
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #f8faff 0%, #e8f2ff 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
}

/* Header Styles */
.header {
    padding: 40px 20px 60px 20px;
    text-align: center;
    background: var(--bg-gradient);
    margin: 0 -20px 40px -20px;
    position: relative;
    overflow: hidden;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.header-content {
    position: relative;
    z-index: 1;
}

.app-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    animation: slideInDown 0.8s ease-out;
}

.app-subtitle {
    font-size: 1.2rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    animation: slideInUp 0.8s ease-out 0.2s both;
}

/* Main Content */
.main-content {
    display: grid;
    gap: 40px;
    padding-bottom: 40px;
}

/* Timer Section */
.timer-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-medium);
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

.timer-container {
    max-width: 500px;
    margin: 0 auto;
}

.timer-display {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    font-family: 'Plus Jakarta Sans', monospace;
    letter-spacing: -0.02em;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.timer-status {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-weight: 500;
}

.timer-controls {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Analytics Section */
.analytics-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-light);
    animation: fadeInUp 0.6s ease-out 0.1s both;
    margin-bottom: 40px;
}

.analytics-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.analytics-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.analytics-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.analytics-period {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 0.9rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: white;
    cursor: pointer;
    transition: var(--transition);
}

.analytics-period:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(71, 132, 241, 0.1);
}

/* Export Dropdown */
.export-dropdown {
    position: relative;
    display: inline-block;
}

.export-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropdown-arrow {
    transition: var(--transition-fast);
}

.export-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.export-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    box-shadow: var(--shadow-medium);
    z-index: 1000;
    min-width: 160px;
    margin-top: 4px;
}

.export-dropdown-menu.hidden {
    display: none;
}

.export-option {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.export-option:hover {
    background: #f8f9fa;
    color: var(--primary-color);
}

.export-option:first-child {
    border-radius: var(--border-radius-small) var(--border-radius-small) 0 0;
}

.export-option:last-child {
    border-radius: 0 0 var(--border-radius-small) var(--border-radius-small);
}

.export-option svg {
    opacity: 0.7;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: linear-gradient(135deg, #f8faff 0%, #e8f2ff 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-light);
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 2rem;
    line-height: 1;
}

.stat-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

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

.analytics-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

.chart-container {
    background: #fafbfc;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 24px;
}

.chart-container h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.category-chart, .daily-chart {
    min-height: 200px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chart-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}

.chart-bar-label {
    min-width: 80px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.chart-bar-visual {
    flex: 1;
    height: 20px;
    background: var(--border-color);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.chart-bar-fill {
    height: 100%;
    border-radius: 10px;
    transition: width 1s ease-out;
    background: var(--secondary-color);
}

.chart-bar-value {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 40px;
    text-align: right;
}

.chart-bar-values {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    min-width: 60px;
}

.chart-bar-total {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--text-muted);
    white-space: nowrap;
}

.productivity-insights {
    background: #fafbfc;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 24px;
}

.productivity-insights h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.insights-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.insight-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    background: white;
    border-radius: var(--border-radius-small);
    border-left: 4px solid var(--secondary-color);
}

.insight-icon {
    font-size: 1.2rem;
    line-height: 1;
    margin-top: 2px;
}

.insight-text {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.insight-text strong {
    color: var(--primary-color);
    font-weight: 600;
}

.chart-empty {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: var(--border-radius-small);
    border: 2px dashed var(--border-color);
}

/* Task Creation */
.task-creation {
    background: white;
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-light);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.task-creation h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

#task-name, #task-category {
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: var(--transition);
    background: #fafbfc;
}

#task-name:focus, #task-category:focus {
    outline: none;
    border-color: var(--secondary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(71, 132, 241, 0.1);
}

#task-name::placeholder {
    color: #a0a0a0;
}

#task-category {
    cursor: pointer;
}

/* Tasks Section */
.tasks-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-light);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.tasks-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.tasks-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.category-filter {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 0.9rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: white;
    cursor: pointer;
    transition: var(--transition);
}

.category-filter:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(71, 132, 241, 0.1);
}

#tasks-count {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.tasks-list {
    display: grid;
    gap: 12px;
}

.task-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    background: #fafbfc;
    transition: var(--transition);
    animation: slideInRight 0.4s ease-out;
    cursor: pointer;
}

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

.task-item.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(21, 78, 155, 0.05) 0%, rgba(71, 132, 241, 0.05) 100%);
    box-shadow: var(--shadow-medium);
}

.task-info {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
}

.task-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    transition: var(--transition);
}

.task-item.active .task-indicator {
    animation: blink 1.5s ease-in-out infinite;
}

/* Category color indicators */
.task-item[data-category="work"] .task-indicator {
    background: var(--category-work);
}

.task-item[data-category="personal"] .task-indicator {
    background: var(--category-personal);
}

.task-item[data-category="learning"] .task-indicator {
    background: var(--category-learning);
}

.task-item[data-category="health"] .task-indicator {
    background: var(--category-health);
}

.task-item[data-category="creative"] .task-indicator {
    background: var(--category-creative);
}

.task-item[data-category="meetings"] .task-indicator {
    background: var(--category-meetings);
}

.task-item[data-category="finance"] .task-indicator {
    background: var(--category-finance);
}

.task-item[data-category="household"] .task-indicator {
    background: var(--category-household);
}

.task-item[data-category="fitness"] .task-indicator {
    background: var(--category-fitness);
}

.task-item[data-category="social"] .task-indicator {
    background: var(--category-social);
}

.task-item[data-category="travel"] .task-indicator {
    background: var(--category-travel);
}

.task-item[data-category="entertainment"] .task-indicator {
    background: var(--category-entertainment);
}

.task-item[data-category="selfcare"] .task-indicator {
    background: var(--category-selfcare);
}

.task-item[data-category="volunteering"] .task-indicator {
    background: var(--category-volunteering);
}

.task-item[data-category="parenting"] .task-indicator {
    background: var(--category-parenting);
}

.task-item[data-category="sidehustle"] .task-indicator {
    background: var(--category-sidehustle);
}

.task-item[data-category="study"] .task-indicator {
    background: var(--category-study);
}

.task-item[data-category="admin"] .task-indicator {
    background: var(--category-admin);
}

.task-item[data-category="break"] .task-indicator {
    background: var(--category-break);
}

.task-item[data-category="spiritual"] .task-indicator {
    background: var(--category-spiritual);
}

.task-item[data-category="other"] .task-indicator {
    background: var(--category-other);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.task-details h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.task-category-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 12px;
    color: white;
    margin-bottom: 4px;
    text-transform: capitalize;
}

.task-category-label.work {
    background: var(--category-work);
}

.task-category-label.personal {
    background: var(--category-personal);
}

.task-category-label.learning {
    background: var(--category-learning);
}

.task-category-label.health {
    background: var(--category-health);
}

.task-category-label.creative {
    background: var(--category-creative);
}

.task-category-label.meetings {
    background: var(--category-meetings);
}

.task-category-label.finance {
    background: var(--category-finance);
}

.task-category-label.household {
    background: var(--category-household);
}

.task-category-label.fitness {
    background: var(--category-fitness);
}

.task-category-label.social {
    background: var(--category-social);
}

.task-category-label.travel {
    background: var(--category-travel);
}

.task-category-label.entertainment {
    background: var(--category-entertainment);
}

.task-category-label.selfcare {
    background: var(--category-selfcare);
}

.task-category-label.volunteering {
    background: var(--category-volunteering);
}

.task-category-label.parenting {
    background: var(--category-parenting);
}

.task-category-label.sidehustle {
    background: var(--category-sidehustle);
}

.task-category-label.study {
    background: var(--category-study);
}

.task-category-label.admin {
    background: var(--category-admin);
}

.task-category-label.break {
    background: var(--category-break);
}

.task-category-label.spiritual {
    background: var(--category-spiritual);
}

.task-category-label.other {
    background: var(--category-other);
}

.task-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.task-actions {
    display: flex;
    gap: 8px;
}

.task-select-btn {
    padding: 8px 16px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.task-select-btn:hover {
    background: var(--primary-color);
    transform: translateY(-1px);
}

.task-delete-btn {
    padding: 8px;
    background: #ff4757;
    color: white;
    border: none;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.task-delete-btn:hover {
    background: #ff3742;
    transform: translateY(-1px);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    margin-bottom: 24px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 1rem;
    opacity: 0.8;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--bg-gradient);
    color: white;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.btn-danger {
    background: #ff4757;
    color: white;
}

.btn-danger:hover {
    background: #ff3742;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled::before {
    display: none;
}

/* Active Task Indicator */
.active-task-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    padding: 16px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
    z-index: 1000;
    animation: slideInRight 0.4s ease-out;
}

.active-task-indicator.hidden {
    transform: translateX(120%);
    opacity: 0;
}

.indicator-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.indicator-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: blink 1.5s ease-in-out infinite;
}

#active-task-name {
    font-weight: 600;
    color: var(--text-primary);
}

#active-task-time {
    font-weight: 500;
    color: var(--secondary-color);
    font-family: monospace;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: white;
    padding: 16px 20px;
    border-radius: var(--border-radius-small);
    box-shadow: var(--shadow-heavy);
    border-left: 4px solid var(--primary-color);
    animation: slideInRight 0.4s ease-out;
    max-width: 300px;
}

.toast.success {
    border-left-color: #2ed573;
}

.toast.error {
    border-left-color: #ff4757;
}

.toast.warning {
    border-left-color: #ffa502;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        padding: 0 16px;
    }
    
    .app-title {
        font-size: 2.5rem;
    }
    
    .timer-display {
        font-size: 3rem;
    }
    
    .timer-section,
    .task-creation,
    .tasks-section {
        padding: 24px;
    }
    
    .timer-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 200px;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .form-group {
        width: 100%;
    }
    
    #task-name, #task-category {
        width: 100%;
    }
    
    .task-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .task-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .active-task-indicator {
        bottom: 16px;
        right: 16px;
        left: 16px;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 2rem;
    }
    
    .timer-display {
        font-size: 2.5rem;
    }
    
    .tasks-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .tasks-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        width: 100%;
    }
    
    .category-filter {
        width: 100%;
    }
    
    .analytics-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .analytics-controls {
        width: 100%;
        flex-direction: column;
        gap: 12px;
    }
    
    .analytics-period {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .analytics-charts {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}