/* =============================================
   TaskFlow - Main Styles
   Light/Dark Theme Support
   ============================================= */

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

:root {
    /* Light Theme */
    --bg-primary: #f8f9fc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1a1d29;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --accent: #6366f1;
    --accent-light: #eef2ff;
    --accent-hover: #4f46e5;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
    --timeline-line: #e5e7eb;
}

[data-theme="dark"] {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d29;
    --bg-card: #21242f;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border: #2d3140;
    --border-light: #252836;
    --accent: #818cf8;
    --accent-light: rgba(129, 140, 248, 0.15);
    --accent-hover: #a5b4fc;
    --success: #34d399;
    --success-light: rgba(52, 211, 153, 0.15);
    --warning: #fbbf24;
    --warning-light: rgba(251, 191, 36, 0.15);
    --danger: #f87171;
    --danger-light: rgba(248, 113, 113, 0.15);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
    --timeline-line: #2d3140;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    line-height: 1.5;
}

/* =============================================
   Top Bar
   ============================================= */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px 6px 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    cursor: pointer;
    position: relative;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--success));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 11px;
    font-weight: 600;
}

.user-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.user-role {
    font-size: 10px;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.user-badge:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: all 0.15s ease;
}

.user-dropdown a:hover {
    background: var(--accent-light);
    color: var(--accent);
}

.user-dropdown a.danger:hover {
    background: var(--danger-light);
    color: var(--danger);
}

/* =============================================
   Main Content
   ============================================= */
.main-content {
    padding-top: 64px;
    min-height: 100vh;
}

/* =============================================
   Timeline Container
   ============================================= */
.timeline-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 32px;
    bottom: 32px;
    width: 2px;
    background: var(--timeline-line);
    transform: translateX(-50%);
}

@media (max-width: 768px) {
    .timeline-line {
        left: 24px;
    }
}

/* =============================================
   Day Block
   ============================================= */
.day-block {
    display: flex;
    gap: 48px;
    margin-bottom: 40px;
    position: relative;
}

@media (max-width: 768px) {
    .day-block {
        flex-direction: column;
        gap: 16px;
        padding-left: 48px;
    }
}

/* Date Badge */
.date-badge {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    z-index: 10;
}

@media (max-width: 768px) {
    .date-badge {
        left: 24px;
        transform: translateX(-50%);
    }
}

.date-badge-inner {
    width: 56px;
    height: 56px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.date-badge.today .date-badge-inner {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.date-day {
    font-size: 18px;
    font-weight: 700;
    line-height: 1;
    color: var(--text-primary);
}

.date-badge.today .date-day {
    color: white;
}

.date-month {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.date-badge.today .date-month {
    color: rgba(255,255,255,0.8);
}

/* =============================================
   Task Panel
   ============================================= */
.task-panel {
    flex: 1;
    max-width: calc(50% - 52px);
}

@media (max-width: 768px) {
    .task-panel {
        max-width: 100%;
    }
}

.task-panel.left {
    margin-right: auto;
}

.task-panel.right {
    margin-left: auto;
}

.task-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

/* Task Item */
.task-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: background 0.15s ease;
}

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

.task-item:hover {
    background: var(--accent-light);
}

.task-item.active {
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
}

.task-item.has-comments {
    border-left: 3px solid var(--warning);
}

.task-item.has-comments .task-comment-badge {
    background: var(--warning-light);
    color: var(--warning);
    font-weight: 600;
}

.task-checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-radius: 6px;
    flex-shrink: 0;
    margin-top: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 12px;
}

.task-checkbox:hover {
    border-color: var(--accent);
}

.task-checkbox.done {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.task-checkbox.complete {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.task-checkbox.rejected {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
}

.task-content {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.task-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.task-assignee {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 3px 8px;
    border-radius: 12px;
}

.task-assignee-avatar {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--success), #059669);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 8px;
    font-weight: 600;
}

.task-comment-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 3px 8px;
    border-radius: 12px;
}

.task-status {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 8px;
    border-radius: 12px;
}

.task-status.pending {
    background: var(--warning-light);
    color: var(--warning);
}

.task-status.done {
    background: var(--success-light);
    color: var(--success);
}

.task-status.complete {
    background: var(--accent-light);
    color: var(--accent);
}

.task-status.rejected {
    background: var(--danger-light);
    color: var(--danger);
}

/* Task Edit Button */
.task-edit-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-primary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    transition: all 0.2s ease;
    flex-shrink: 0;
    margin-left: 8px;
}

.task-edit-btn:hover {
    background: var(--accent-light);
    color: var(--accent);
}

/* =============================================
   Comment Panel
   ============================================= */
.comment-panel {
    flex: 1;
    max-width: calc(50% - 52px);
    opacity: 0;
    transform: translateX(20px);
    pointer-events: none;
    transition: all 0.3s ease;
}

.comment-panel.visible {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

@media (max-width: 768px) {
    .comment-panel {
        max-width: 100%;
        transform: translateY(20px);
    }
    
    .comment-panel.visible {
        transform: translateY(0);
    }
}

.comment-card {
    background: var(--bg-card);
    border: 2px solid var(--accent);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comment-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--accent-light);
}

.comment-task-ref {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.comment-close {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--bg-card);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.comment-close:hover {
    background: var(--danger-light);
    color: var(--danger);
}

.comment-body {
    padding: 16px;
    max-height: 250px;
    overflow-y: auto;
}

.comment-item {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.comment-item:last-child {
    margin-bottom: 0;
}

.comment-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    color: white;
}

.comment-avatar.admin {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
}

.comment-avatar.worker {
    background: linear-gradient(135deg, var(--success), #059669);
}

.comment-bubble {
    flex: 1;
    background: var(--bg-primary);
    padding: 10px 12px;
    border-radius: 12px;
    border-top-left-radius: 4px;
}

.comment-author {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 4px;
}

.comment-text {
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.4;
    word-wrap: break-word;
}

.comment-time {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 4px;
}

.comment-input-area {
    padding: 12px 16px;
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 10px;
}

.comment-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease;
}

.comment-input:focus {
    border-color: var(--accent);
}

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

.comment-send {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--accent);
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    transition: all 0.2s ease;
}

.comment-send:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

/* Admin Actions */
.admin-actions {
    padding: 12px 16px;
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 8px;
}

.action-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
}

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

.action-btn.complete:hover {
    background: #059669;
}

.action-btn.reject {
    background: var(--danger-light);
    color: var(--danger);
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 14px;
}

.empty-comment {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
}

.empty-comment-icon {
    font-size: 32px;
    margin-bottom: 8px;
    opacity: 0.5;
}

.empty-comment-text {
    font-size: 13px;
}

/* =============================================
   Add Task Button (FAB)
   ============================================= */
.add-task-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    box-shadow: var(--shadow-lg), 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: all 0.2s ease;
    z-index: 50;
}

.add-task-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-lg), 0 8px 30px rgba(99, 102, 241, 0.5);
}

/* =============================================
   Modal
   ============================================= */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background: var(--bg-card);
    z-index: 1;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-primary);
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 18px;
    transition: all 0.2s ease;
}

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

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input, .form-select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease;
}

.form-input:focus, .form-select:focus {
    border-color: var(--accent);
}

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

textarea.form-input {
    resize: vertical;
    min-height: 100px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

.btn-secondary:hover {
    background: var(--border-light);
}

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

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

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

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

/* =============================================
   Load More
   ============================================= */
.load-more {
    text-align: center;
    padding: 20px;
}

.load-more-btn {
    padding: 12px 32px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.load-more-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
}

/* =============================================
   Login Page
   ============================================= */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

.login-logo .logo-icon {
    width: 48px;
    height: 48px;
    font-size: 20px;
}

.login-logo span {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.login-title {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form .btn {
    width: 100%;
    padding: 14px;
    margin-top: 8px;
}

.login-error {
    background: var(--danger-light);
    color: var(--danger);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 13px;
    margin-bottom: 20px;
    text-align: center;
}

/* =============================================
   Scrollbar
   ============================================= */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.day-block {
    animation: fadeIn 0.4s ease forwards;
}

/* Loading Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 100px;
    right: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    z-index: 300;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--danger);
}

/* =============================================
   Workers List (Admin)
   ============================================= */
.workers-section {
    margin-bottom: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.worker-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 8px;
}

.worker-card .user-avatar {
    width: 40px;
    height: 40px;
    font-size: 14px;
}

.worker-info {
    flex: 1;
}

.worker-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.worker-email {
    font-size: 12px;
    color: var(--text-secondary);
}

.worker-status {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
}

.worker-status.online {
    background: var(--success-light);
    color: var(--success);
}

.worker-status.offline {
    background: var(--bg-primary);
    color: var(--text-muted);
}