:root {
    --pietask-primary: #3b82f6;
    --pietask-secondary: #06b6d4;
    --pietask-accent: #8b5cf6;
    --pietask-success: #10b981;
    --pietask-warning: #f59e0b;
    --pietask-danger: #ef4444;
    --pietask-bg: #fafafa;
    --pietask-card-bg: #ffffff;
    --pietask-border: #e5e7eb;
    --pietask-text: #111827;
    --pietask-text-muted: #6b7280;
    --pietask-shadow: rgba(0, 0, 0, 0.05);
    --pietask-shadow-hover: rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
}

.pietask-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
    background: var(--pietask-bg);
    min-height: 100vh;
    color: var(--pietask-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Action Bar */
.pietask-action-bar {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.pietask-action-btn {
    padding: 0.625rem 1.25rem;
    background: var(--pietask-card-bg);
    border: 1px solid var(--pietask-border);
    border-radius: 8px;
    color: var(--pietask-text);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    box-shadow: 0 1px 3px var(--pietask-shadow);
}

.pietask-action-btn:hover {
    border-color: var(--pietask-primary);
    background: #f9fafb;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px var(--pietask-shadow-hover);
}

.pietask-action-icon {
    font-size: 1rem;
}

/* AI Input Section */
.pietask-ai-section {
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease-out;
}

/* Settings Section */
.pietask-settings-section {
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease-out;
}

.pietask-settings-wrapper {
    background: var(--pietask-card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--pietask-border);
    box-shadow: 0 1px 3px var(--pietask-shadow);
}

.pietask-settings-title {
    margin: 0 0 1.5rem 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--pietask-text);
}

.pietask-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.pietask-setting-item label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--pietask-text);
}

.pietask-setting-item input {
    width: 100%;
    padding: 0.625rem;
    background: var(--pietask-bg);
    border: 1px solid var(--pietask-border);
    border-radius: 8px;
    color: var(--pietask-text);
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.pietask-setting-item input:focus {
    outline: none;
    border-color: var(--pietask-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.pietask-settings-actions {
    display: flex;
    gap: 0.75rem;
}

.pietask-ai-input-wrapper {
    background: var(--pietask-card-bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--pietask-border);
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px var(--pietask-shadow);
}

.pietask-ai-input-wrapper:focus-within {
    border-color: var(--pietask-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.pietask-ai-input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--pietask-text);
    font-size: 1.1rem;
    outline: none;
    resize: vertical;
    font-family: inherit;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.pietask-ai-input::placeholder {
    color: var(--pietask-text-muted);
}

.pietask-ai-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.pietask-ai-status {
    color: var(--pietask-text-muted);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pietask-ai-status.loading::before {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid var(--pietask-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.pietask-btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.pietask-btn-primary {
    background: var(--pietask-primary);
    color: white;
    box-shadow: 0 1px 3px var(--pietask-shadow);
}

.pietask-btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 4px 6px var(--pietask-shadow-hover);
}

.pietask-btn-secondary {
    background: var(--pietask-card-bg);
    color: var(--pietask-text);
    border: 1px solid var(--pietask-border);
}

.pietask-btn-secondary:hover {
    border-color: var(--pietask-primary);
    background: #f9fafb;
}

.pietask-icon {
    font-size: 1.2rem;
}

/* Week Navigation */
.pietask-week-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    padding: 0.25rem 0;
    animation: fadeIn 0.8s ease-out;
}

.pietask-day-btn {
    padding: 0.625rem 1rem;
    background: var(--pietask-card-bg);
    border: 1px solid var(--pietask-border);
    border-radius: 8px;
    color: var(--pietask-text);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    font-weight: 500;
    font-size: 0.875rem;
}

.pietask-day-btn:hover {
    border-color: var(--pietask-primary);
    background: #f9fafb;
}

.pietask-day-btn.active {
    background: var(--pietask-primary);
    border-color: var(--pietask-primary);
    color: white;
}

/* Stats Section */
.pietask-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 1s ease-out;
}

.pietask-stat-card {
    background: var(--pietask-card-bg);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--pietask-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px var(--pietask-shadow);
}

.pietask-stat-card:hover {
    box-shadow: 0 4px 6px var(--pietask-shadow-hover);
}

.pietask-stat-icon {
    font-size: 1.75rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--pietask-primary), var(--pietask-secondary));
    border-radius: 8px;
}

.pietask-stat-label {
    color: var(--pietask-text-muted);
    font-size: 0.75rem;
    margin-bottom: 0.125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pietask-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--pietask-text);
}

/* Add Task Section */
.pietask-add-task-section {
    margin-bottom: 1.5rem;
    animation: fadeIn 1.2s ease-out;
}

/* Tasks Container */
.pietask-tasks-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    animation: fadeIn 1.4s ease-out;
}

/* Task Card */
.pietask-task-card {
    background: var(--pietask-card-bg);
    border-radius: 8px;
    border: 1px solid var(--pietask-border);
    transition: all 0.2s ease;
    animation: slideInUp 0.5s ease-out;
    box-shadow: 0 1px 3px var(--pietask-shadow);
    cursor: grab;
}

.pietask-task-card:hover {
    box-shadow: 0 4px 6px var(--pietask-shadow-hover);
}

.pietask-task-card.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.pietask-task-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    cursor: pointer;
    user-select: none;
}

.pietask-task-header:hover .pietask-task-expand-icon {
    color: var(--pietask-primary);
}

.pietask-task-expand-icon {
    font-size: 1rem;
    color: var(--pietask-text-muted);
    transition: all 0.2s ease;
    width: 20px;
    text-align: center;
}

.pietask-task-card.expanded .pietask-task-expand-icon {
    transform: rotate(90deg);
}

.pietask-task-drag-handle {
    cursor: grab;
    color: var(--pietask-text-muted);
    font-size: 1.25rem;
    line-height: 1;
}

.pietask-task-drag-handle:active {
    cursor: grabbing;
}

.pietask-task-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--pietask-primary);
}

.pietask-task-title-wrapper {
    flex: 1;
    position: relative;
}

.pietask-task-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--pietask-text);
}

.pietask-task-tooltip {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 0;
    background: var(--pietask-text);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    z-index: 100;
    min-width: 250px;
    max-width: 400px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.pietask-task-title-wrapper:hover .pietask-task-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.pietask-task-tooltip-arrow {
    position: absolute;
    bottom: -6px;
    left: 20px;
    width: 12px;
    height: 12px;
    background: var(--pietask-text);
    transform: rotate(45deg);
}

.pietask-task-tooltip-content {
    position: relative;
    z-index: 1;
    font-size: 0.8125rem;
    line-height: 1.5;
    font-weight: 400;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.pietask-task-header-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.pietask-task-header:hover .pietask-task-header-btn {
    opacity: 1;
}

.pietask-task-header-btn:hover {
    transform: scale(1.2);
}

.pietask-task-priority {
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pietask-task-priority.high {
    background: #fee2e2;
    color: #dc2626;
}

.pietask-task-priority.medium {
    background: #fef3c7;
    color: #d97706;
}

.pietask-task-priority.low {
    background: #d1fae5;
    color: #059669;
}

.pietask-task-body {
    padding: 0 1rem 0.875rem 1rem;
    display: none;
}

.pietask-task-card.expanded .pietask-task-body {
    display: block;
}

.pietask-task-meta {
    display: flex;
    gap: 1rem;
    color: var(--pietask-text-muted);
    font-size: 0.8125rem;
    margin-bottom: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--pietask-border);
}

.pietask-task-meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.pietask-time-breakdown {
    font-size: 0.75rem;
    color: var(--pietask-text-muted);
    font-style: italic;
    margin-left: 0.25rem;
}

.pietask-task-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.pietask-task-btn {
    padding: 0.375rem 0.75rem;
    background: transparent;
    border: 1px solid var(--pietask-border);
    border-radius: 6px;
    color: var(--pietask-text);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8125rem;
}

.pietask-task-btn:hover {
    background: var(--pietask-primary);
    border-color: var(--pietask-primary);
    color: white;
}

/* Progress Bar */
.pietask-progress-bar {
    width: 100%;
    height: 6px;
    background: #e5e7eb;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.pietask-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--pietask-primary), var(--pietask-secondary));
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* Subtasks */
.pietask-subtasks {
    margin-top: 0.75rem;
    padding-left: 1.5rem;
    border-left: 2px solid var(--pietask-border);
}

.pietask-subtask {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    margin-bottom: 0.375rem;
    background: #f9fafb;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.pietask-subtask:hover {
    background: #f3f4f6;
}

.pietask-subtask-title-wrapper {
    flex: 1;
    position: relative;
}

.pietask-subtask-title {
    display: block;
}

.pietask-subtask-tooltip {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 0;
    background: var(--pietask-text);
    color: white;
    padding: 0.625rem 0.875rem;
    border-radius: 6px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    z-index: 100;
    min-width: 200px;
    max-width: 350px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.pietask-subtask-title-wrapper:hover .pietask-subtask-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.pietask-subtask-tooltip-arrow {
    position: absolute;
    bottom: -5px;
    left: 15px;
    width: 10px;
    height: 10px;
    background: var(--pietask-text);
    transform: rotate(45deg);
}

.pietask-subtask-tooltip-content {
    position: relative;
    z-index: 1;
    font-size: 0.75rem;
    line-height: 1.5;
    font-weight: 400;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.pietask-subtask-edit-btn,
.pietask-subtask-delete-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.75rem;
    padding: 0.125rem 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.pietask-subtask:hover .pietask-subtask-edit-btn,
.pietask-subtask:hover .pietask-subtask-delete-btn {
    opacity: 1;
}

.pietask-subtask-edit-btn:hover,
.pietask-subtask-delete-btn:hover {
    transform: scale(1.2);
}

/* Modal */
.pietask-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease-out;
}

.pietask-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.pietask-modal-content {
    background: var(--pietask-card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--pietask-border);
    animation: slideInUp 0.4s ease-out;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.pietask-modal-close {
    float: right;
    font-size: 2rem;
    cursor: pointer;
    color: var(--pietask-text-muted);
    transition: color 0.3s ease;
}

.pietask-modal-close:hover {
    color: var(--pietask-danger);
}

.pietask-modal h2 {
    margin-bottom: 1.5rem;
    color: var(--pietask-text);
}

/* Form Styles */
.pietask-form-group {
    margin-bottom: 1.5rem;
}

.pietask-form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--pietask-text);
    font-weight: 500;
}

.pietask-form-group input,
.pietask-form-group textarea,
.pietask-form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--pietask-bg);
    border: 2px solid var(--pietask-border);
    border-radius: 10px;
    color: var(--pietask-text);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.pietask-form-group input:focus,
.pietask-form-group textarea:focus,
.pietask-form-group select:focus {
    outline: none;
    border-color: var(--pietask-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.pietask-form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.pietask-btn-cancel {
    background: transparent;
    color: var(--pietask-text-muted);
    border: 2px solid var(--pietask-border);
}

.pietask-btn-cancel:hover {
    background: var(--pietask-danger);
    border-color: var(--pietask-danger);
    color: white;
}

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

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

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

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Login Required */
.pietask-login-required {
    padding: 2rem;
    text-align: center;
    background: var(--pietask-card-bg);
    border-radius: 15px;
    color: var(--pietask-text);
    border: 2px solid var(--pietask-border);
}

/* Pomodoro Timer */
.pietask-pomodoro-section {
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease-out;
}

.pietask-pomodoro-container {
    background: var(--pietask-card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--pietask-border);
    box-shadow: 0 4px 6px var(--pietask-shadow-hover);
    text-align: center;
}

.pietask-pomodoro-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.pietask-pomodoro-mode {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--pietask-text);
}

.pietask-pomodoro-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--pietask-text-muted);
}

.pietask-pomodoro-tomato {
    font-size: 1.25rem;
}

.pietask-pomodoro-close-btn {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--pietask-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.pietask-pomodoro-close-btn:hover {
    background: #fee2e2;
    color: var(--pietask-danger);
}

.pietask-pomodoro-timer-wrapper {
    position: relative;
    width: 250px;
    height: 250px;
    margin: 0 auto 2rem;
}

.pietask-pomodoro-progress {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.pietask-pomodoro-progress-bg {
    fill: none;
    stroke: #e5e7eb;
    stroke-width: 8;
}

.pietask-pomodoro-progress-bar {
    fill: none;
    stroke: #3b82f6;
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke 0.3s ease;
}

.pietask-pomodoro-time {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: 700;
    color: var(--pietask-text);
    font-variant-numeric: tabular-nums;
}

.pietask-pomodoro-task-info {
    margin-bottom: 2rem;
}

.pietask-pomodoro-task-label {
    font-size: 0.875rem;
    color: var(--pietask-text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pietask-pomodoro-task-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--pietask-text);
}

.pietask-pomodoro-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.pietask-subtask-start-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.75rem;
    padding: 0.125rem 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.pietask-subtask:hover .pietask-subtask-start-btn {
    opacity: 1;
}

.pietask-subtask-start-btn:hover {
    transform: scale(1.2);
}

/* Responsive */
@media (max-width: 768px) {
    .pietask-container {
        padding: 1rem;
    }
    
    .pietask-form-row {
        grid-template-columns: 1fr;
    }
    
    .pietask-week-nav {
        flex-wrap: wrap;
    }
    
    .pietask-ai-input-wrapper {
        flex-direction: column;
    }
    
    .pietask-pomodoro-timer-wrapper {
        width: 200px;
        height: 200px;
    }
    
    .pietask-pomodoro-time {
        font-size: 2.5rem;
    }
    
    .pietask-pomodoro-controls {
        flex-direction: column;
    }
}