/* ============================================
   Design Task Manager — Main Stylesheet
   ============================================ */

/* --- CSS Variables --- */
:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    --secondary: #64748B;
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    --info: #3B82F6;
    --info-light: #DBEAFE;

    --bg: #F1F5F9;
    --bg-white: #FFFFFF;
    --bg-card: #FFFFFF;

    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --text-white: #FFFFFF;

    --border: #E2E8F0;
    --border-focus: #4F46E5;

    --sidebar-width: 260px;
    --sidebar-bg: #1E293B;
    --sidebar-text: #CBD5E1;
    --sidebar-active: #4F46E5;
    --sidebar-hover: #334155;

    --radius: 8px;
    --radius-lg: 12px;
    --radius-sm: 4px;

    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);

    --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --font-ar: 'Segoe UI', 'Tahoma', 'Arial', sans-serif;

    --transition: all 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 15px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

body.rtl {
    font-family: var(--font-ar);
}

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

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

img {
    max-width: 100%;
}

/* --- Layout --- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.rtl .main-content {
    margin-left: 0;
    margin-right: var(--sidebar-width);
}

.content-wrapper {
    padding: 24px;
    flex: 1;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.rtl .sidebar {
    left: auto;
    right: 0;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-img {
    height: 48px;
    width: auto;
    border-radius: 6px;
}

.logo-img-sm {
    height: 32px;
    width: auto;
    border-radius: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin: 2px 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: var(--sidebar-text);
    border-radius: var(--radius);
    transition: var(--transition);
    font-size: 0.93rem;
}

.nav-link:hover {
    background: var(--sidebar-hover);
    color: var(--text-white);
}

.nav-item.active .nav-link {
    background: var(--sidebar-active);
    color: var(--text-white);
}

.nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 12px 8px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.logout-link {
    color: var(--danger) !important;
}

.logout-link:hover {
    background: rgba(239,68,68,0.15) !important;
}

/* --- Top Bar --- */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    gap: 16px;
    flex-wrap: wrap;
}

.top-bar-left {
    flex: 1;
    min-width: 0;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.badge-role {
    font-size: 0.75rem;
    padding: 2px 8px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
}

.lang-switch {
    font-size: 0.85rem;
}

/* --- Mobile Header --- */
.mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--sidebar-bg);
    color: var(--text-white);
    position: sticky;
    top: 0;
    z-index: 90;
}

.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-white);
    border-radius: 2px;
    transition: var(--transition);
}

.lang-toggle-mobile {
    color: var(--text-white) !important;
    font-size: 0.85rem;
    padding: 4px 10px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-sm);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 95;
}

/* --- Cards --- */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px;
    border: 1px solid var(--border);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.kpi-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.kpi-icon svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

.kpi-icon.total { background: var(--primary-light); color: var(--primary); }
.kpi-icon.new { background: var(--info-light); color: var(--info); }
.kpi-icon.progress { background: var(--warning-light); color: var(--warning); }
.kpi-icon.delivered { background: var(--success-light); color: var(--success); }

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

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

.kpi-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

thead {
    background: var(--bg);
}

th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.rtl th {
    text-align: right;
}

td {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    color: var(--text-primary);
    vertical-align: middle;
}

.rtl td {
    text-align: right;
}

tr:hover td {
    background: var(--bg);
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    white-space: nowrap;
}

.badge-new { background: var(--info-light); color: var(--info); }
.badge-progress { background: var(--warning-light); color: var(--warning); }
.badge-delivered { background: var(--success-light); color: var(--success); }
.badge-overdue { background: var(--danger-light); color: var(--danger); }
.badge-default { background: var(--bg); color: var(--text-secondary); }

/* --- Progress Bar --- */
.progress-bar-container {
    width: 100%;
    max-width: 120px;
    background: var(--bg);
    border-radius: 10px;
    height: 8px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    border-radius: 10px;
    transition: width 0.4s ease;
}

.progress-complete .progress-bar,
.progress-bar.progress-complete { background: var(--success); }
.progress-high .progress-bar,
.progress-bar.progress-high { background: #34D399; }
.progress-mid .progress-bar,
.progress-bar.progress-mid { background: var(--warning); }
.progress-low .progress-bar,
.progress-bar.progress-low { background: #FB923C; }
.progress-zero .progress-bar,
.progress-bar.progress-zero { background: var(--text-muted); }

.progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-success { background: var(--success); color: var(--text-white); }
.btn-success:hover { background: #059669; color: var(--text-white); }

.btn-warning { background: var(--warning); color: var(--text-primary); }
.btn-warning:hover { background: #D97706; }

.btn-danger { background: var(--danger); color: var(--text-white); }
.btn-danger:hover { background: #DC2626; color: var(--text-white); }

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.82rem;
}

.btn-lg {
    padding: 12px 28px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

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

.form-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-white);
    transition: var(--transition);
    line-height: 1.5;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

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

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8.825L.35 3.175l.7-.7L6 7.425l4.95-4.95.7.7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.rtl select.form-control {
    background-position: left 12px center;
    padding-right: 14px;
    padding-left: 36px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-error {
    font-size: 0.8rem;
    color: var(--danger);
    margin-top: 4px;
}

/* Filter bar */
.filter-bar {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    padding: 20px;
    margin-bottom: 24px;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    align-items: end;
}

.filter-actions {
    display: flex;
    gap: 8px;
    align-items: end;
    padding-top: 22px;
}

/* --- Alerts --- */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    animation: fadeIn 0.3s ease;
}

.alert-success { background: var(--success-light); color: #065F46; border: 1px solid #A7F3D0; }
.alert-error { background: var(--danger-light); color: #991B1B; border: 1px solid #FECACA; }
.alert-warning { background: var(--warning-light); color: #92400E; border: 1px solid #FDE68A; }
.alert-info { background: var(--info-light); color: #1E40AF; border: 1px solid #BFDBFE; }

.alert-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
    padding: 0 4px;
    line-height: 1;
}

.alert-close:hover { opacity: 1; }

/* --- Login Page --- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1E293B 0%, #334155 50%, #1E293B 100%);
    padding: 20px;
}

.login-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-logo {
    margin-bottom: 24px;
}

.login-logo img {
    height: 64px;
    width: auto;
    border-radius: 8px;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.login-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.login-form .form-group {
    text-align: left;
}

.rtl .login-form .form-group {
    text-align: right;
}

.login-lang {
    margin-top: 16px;
}

.login-lang a {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- Quick Actions --- */
.quick-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.quick-action-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: var(--shadow);
}

.quick-action-btn svg {
    width: 18px;
    height: 18px;
}

/* --- Task Detail --- */
.task-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.detail-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.detail-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.detail-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* --- Report Cards --- */
.report-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.report-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
}

.report-card-header {
    padding: 16px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.report-card-title {
    font-size: 1rem;
    font-weight: 600;
}

.report-card-body {
    padding: 20px;
}

.report-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.report-stat:last-child {
    border-bottom: none;
}

.report-stat-label {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.report-stat-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.delivery-rate {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    padding: 16px;
}

.delivery-rate.high { color: var(--success); }
.delivery-rate.medium { color: var(--warning); }
.delivery-rate.low { color: var(--danger); }

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

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 1rem;
    margin-bottom: 16px;
}

/* --- Modal --- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

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

.modal {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeIn 0.2s ease;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.05rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* --- Utilities --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-small { font-size: 0.82rem; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex-wrap { flex-wrap: wrap; }

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

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

/* --- Deadline Styling --- */
.deadline-overdue {
    color: var(--danger);
    font-weight: 600;
}

.deadline-today {
    color: var(--warning);
    font-weight: 600;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .filter-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .rtl .sidebar {
        transform: translateX(100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .main-content {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }

    .mobile-header {
        display: flex;
    }

    .top-bar {
        display: none;
    }

    .content-wrapper {
        padding: 16px;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .kpi-card {
        padding: 14px;
    }

    .kpi-value {
        font-size: 1.2rem;
    }

    .card {
        padding: 16px;
    }

    .filter-grid {
        grid-template-columns: 1fr;
    }

    .filter-actions {
        padding-top: 0;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .btn-group {
        flex-direction: column;
    }

    .task-detail-grid {
        grid-template-columns: 1fr;
    }

    .report-grid {
        grid-template-columns: 1fr;
    }

    .login-card {
        padding: 28px 20px;
    }

    table {
        font-size: 0.82rem;
    }

    th, td {
        padding: 10px 12px;
    }

    .quick-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .kpi-card {
        gap: 12px;
    }

    .user-info {
        display: none;
    }
}