@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=Sarabun:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette - Premium Blue & White Theme */
    --bg-base: #f4f7fa;
    --bg-surface: #ffffff;
    --bg-input: #f8fafc;
    
    --primary: #2563eb;
    --primary-light: #eff6ff;
    --primary-hover: #1d4ed8;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Status Colors */
    --color-todo: #64748b;
    --color-todo-bg: #f1f5f9;
    
    --color-inprogress: #0284c7;
    --color-inprogress-bg: #e0f2fe;
    
    --color-review: #7c3aed;
    --color-review-bg: #f5f3ff;
    
    --color-completed: #16a34a;
    --color-completed-bg: #dcfce7;
    
    /* Priority Colors */
    --priority-high: #dc2626;
    --priority-high-bg: #fee2e2;
    --priority-medium: #d97706;
    --priority-medium-bg: #fef3c7;
    --priority-low: #2563eb;
    --priority-low-bg: #dbeafe;
    
    /* System Tokens */
    --font-family: 'Plus Jakarta Sans', 'Sarabun', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.1);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-base);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* Base Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Role Navigation */
header {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1e3a8a;
    letter-spacing: -0.025em;
}

.role-selector {
    display: flex;
    background-color: #f1f5f9;
    padding: 0.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.role-btn {
    border: none;
    background: none;
    padding: 0.5rem 1rem;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.role-btn:hover {
    color: var(--text-main);
}

.role-btn.active {
    background-color: var(--bg-surface);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

/* Main Content Area */
main {
    flex: 1;
    padding: 2rem;
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
}

.view-section {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Manager View: Dashboard Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 3fr 1fr;
    }
}

/* Dashboard Summary Cards (Metrics) */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.metric-card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.metric-details h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.metric-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Assignee summary styles in Metrics */
.metric-card.todo .metric-icon { background-color: var(--color-todo-bg); color: var(--color-todo); }
.metric-card.inprogress .metric-icon { background-color: var(--color-inprogress-bg); color: var(--color-inprogress); }
.metric-card.review .metric-icon { background-color: var(--color-review-bg); color: var(--color-review); }
.metric-card.completed .metric-icon { background-color: var(--color-completed-bg); color: var(--color-completed); }

/* Card Styling */
.card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 2rem;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #fafbfc;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1e3a8a;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Forms & Inputs */
.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

@media (min-width: 640px) {
    .form-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .form-col-full {
        grid-column: span 2;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-control {
    font-family: var(--font-family);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-input);
    color: var(--text-main);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background-color: var(--bg-surface);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.btn {
    font-family: var(--font-family);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-inverse);
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.15);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 12px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
    background-color: #f1f5f9;
    color: var(--text-muted);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #e2e8f0;
    color: var(--text-main);
}

.btn-icon {
    padding: 0.5rem;
    border-radius: 50%;
    font-size: 1rem;
    width: 32px;
    height: 32px;
    line-height: 1;
}

.btn-danger {
    background-color: #ef4444;
    color: white;
}

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

/* Team Workload Bars */
.team-workload-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.member-workload-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.member-workload-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.member-name-tag {
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.member-task-count {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.workload-bar-bg {
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.workload-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    border-radius: 4px;
    transition: width 0.5s ease-out;
}

/* Tasks Table / Overview */
.table-filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

table.tasks-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

table.tasks-table th {
    background-color: #fafbfc;
    padding: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

table.tasks-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

table.tasks-table tr:last-child td {
    border-bottom: none;
}

table.tasks-table tr:hover td {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-todo { background-color: var(--color-todo-bg); color: var(--color-todo); }
.badge-inprogress { background-color: var(--color-inprogress-bg); color: var(--color-inprogress); }
.badge-review { background-color: var(--color-review-bg); color: var(--color-review); }
.badge-completed { background-color: var(--color-completed-bg); color: var(--color-completed); }

.badge-priority-high { background-color: var(--priority-high-bg); color: var(--priority-high); }
.badge-priority-medium { background-color: var(--priority-medium-bg); color: var(--priority-medium); }
.badge-priority-low { background-color: var(--priority-low-bg); color: var(--priority-low); }

/* Member Kanban Board */
.kanban-view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.member-profile-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.member-avatar-large {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    border: 2px solid var(--primary);
}

.member-name-large {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.member-desc-large {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.kanban-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    align-items: start;
}

.kanban-column {
    background-color: #f1f5f9;
    border-radius: var(--radius-lg);
    padding: 1rem;
    border: 1px solid var(--border-color);
    min-height: 500px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.kanban-column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.25rem 0.5rem;
}

.kanban-column-title {
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
}

.column-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.column-todo .column-dot { background-color: var(--color-todo); }
.column-inprogress .column-dot { background-color: var(--color-inprogress); }
.column-review .column-dot { background-color: var(--color-review); }
.column-completed .column-dot { background-color: var(--color-completed); }

.kanban-count-badge {
    background-color: #cbd5e1;
    color: var(--text-main);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 9999px;
}

.kanban-cards-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 400px;
    overflow-y: auto;
}

/* Kanban Cards */
.task-card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    cursor: grab;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    user-select: none;
}

.task-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.task-card:active {
    cursor: grabbing;
}

.task-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
}

.task-card-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
    line-height: 1.3;
}

.task-card-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-card-dates {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.date-row {
    display: flex;
    justify-content: space-between;
}

.date-row .overdue {
    color: var(--priority-high);
    font-weight: 700;
}

.task-card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f1f5f9;
    padding-top: 0.75rem;
}

.card-nav-buttons {
    display: flex;
    gap: 0.25rem;
}

.card-nav-btn {
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    color: var(--text-muted);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-family: var(--font-family);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.card-nav-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

/* Modals / Action Dialogs */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn var(--transition-fast);
}

.modal-overlay.active {
    display: flex;
}

.modal-container {
    background-color: var(--bg-surface);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: scaleUp var(--transition-fast);
}

@keyframes scaleUp {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #fafbfc;
}

.modal-title {
    font-weight: 700;
    color: #1e3a8a;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-close:hover {
    color: var(--text-main);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    background-color: #fafbfc;
}

/* Footer Section */
footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* Empty states */
.empty-state {
    padding: 2.5rem 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.empty-icon {
    font-size: 2.5rem;
    color: #cbd5e1;
}

/* Color Dot Helper classes */
.dot-ป๊า { background-color: #2563eb; }
.dot-แม่ { background-color: #ec4899; }
.dot-ไอเดีย { background-color: #10b981; }
.dot-น้องดรีม { background-color: #f59e0b; }

.text-color-ป๊า { color: #2563eb; }
.text-color-แม่ { color: #ec4899; }
.text-color-ไอเดีย { color: #10b981; }
.text-color-น้องดรีม { color: #f59e0b; }

/* Drag and Drop styles */
.kanban-cards-wrapper.drag-over {
    background-color: rgba(37, 99, 235, 0.05);
    border: 2px dashed var(--primary);
    border-radius: var(--radius-md);
}

.task-card.dragging {
    opacity: 0.4;
    cursor: grabbing;
}