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

:root {
    /* Renk Paleti - Slate & Indigo / Premium Dark-Light Mod */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --bg-app: #f4f6fa;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-sidebar-hover: #1e293b;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #e0e7ff;
    
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;
    --color-pending: #8b5cf6;
    --color-pending-light: #ede9fe;
    
    /* Öncelik Renkleri */
    --color-priority-low: #64748b;
    --color-priority-medium: #3b82f6;
    --color-priority-high: #f59e0b;
    --color-priority-urgent: #ef4444;
    
    --border-color: #e2e8f0;
    --border-radius-sm: 6px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

[data-theme="dark"] {
    --bg-app: #0b0f19;
    --bg-card: #151f32;
    --bg-sidebar: #090d16;
    --bg-sidebar-hover: #151f32;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    --border-color: #1e293b;
    
    --color-primary-light: rgba(79, 70, 229, 0.15);
    --color-success-light: rgba(16, 185, 129, 0.15);
    --color-danger-light: rgba(239, 68, 68, 0.15);
    --color-warning-light: rgba(245, 158, 11, 0.15);
    --color-info-light: rgba(59, 130, 246, 0.15);
    --color-pending-light: rgba(139, 92, 246, 0.15);
}

/* Genel Sınıflar ve Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: inherit;
    text-decoration: none;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform var(--transition-normal);
}

.sidebar-brand {
    padding: 24px;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: #ffffff;
}

.sidebar-brand svg {
    color: var(--color-primary);
}

.sidebar-menu {
    list-style: none;
    padding: 20px 12px;
    flex-grow: 1;
    overflow-y: auto;
}

.sidebar-item {
    margin-bottom: 4px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-light);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.sidebar-link:hover, .sidebar-item.active .sidebar-link {
    color: #ffffff;
    background-color: var(--bg-sidebar-hover);
}

.sidebar-link svg {
    width: 20px;
    height: 20px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 13px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Main Content Area */
.main-wrapper {
    flex-grow: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

/* Header */
.main-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 90;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    font-size: 24px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--bg-app);
    color: var(--text-main);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-info {
    font-size: 14px;
}

.user-name {
    font-weight: 600;
    display: block;
}

.user-role {
    font-size: 12px;
    color: var(--text-muted);
    display: block;
}

/* Page Content */
.content-body {
    padding: 30px;
    flex-grow: 1;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-title h1 {
    font-size: 24px;
    font-weight: 700;
}

.page-title p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 4px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

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

.btn-secondary {
    background-color: var(--bg-app);
    color: var(--text-main);
    border-color: var(--border-color);
}

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

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

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

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

/* Dashboard Statistics Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.stat-info h3 {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    margin-top: 8px;
}

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

.stat-icon.primary { background-color: var(--color-primary-light); color: var(--color-primary); }
.stat-icon.warning { background-color: var(--color-warning-light); color: var(--color-warning); }
.stat-icon.success { background-color: var(--color-success-light); color: var(--color-success); }
.stat-icon.danger { background-color: var(--color-danger-light); color: var(--color-danger); }
.stat-icon.pending { background-color: var(--color-pending-light); color: var(--color-pending); }

/* Dashboard Content Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

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

/* Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.table th {
    padding: 12px 16px;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 13px;
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-main);
    vertical-align: middle;
}

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

.table tr:hover td {
    background-color: rgba(0, 0, 0, 0.01);
}

[data-theme="dark"] .table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

/* Task Priority Indicators */
.priority-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

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

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

.filter-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)) auto;
    gap: 16px;
    align-items: flex-end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-card);
    color: var(--text-main);
    font-family: var(--font-family);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 110;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.modal-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 550px;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform var(--transition-normal);
    overflow: hidden;
}

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
}

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

.modal-body {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

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

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: var(--bg-card);
    color: var(--text-main);
    border-left: 4px solid var(--color-info);
    border-radius: var(--border-radius-sm);
    padding: 16px 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    min-width: 300px;
    cursor: pointer;
    animation: slideIn 0.3s forwards;
}

.toast-close {
    font-size: 20px;
    color: var(--text-light);
}

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

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Login Page Styling */
.login-container {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    padding: 20px;
}

.login-card {
    background-color: rgba(21, 31, 50, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    color: #ffffff;
}

.login-header {
    padding: 40px 40px 20px;
    text-align: center;
}

.login-brand {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.login-brand svg {
    color: var(--color-primary);
}

.login-header p {
    color: var(--text-light);
    font-size: 14px;
}

.login-body {
    padding: 20px 40px 40px;
}

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

.login-body .form-control {
    background-color: rgba(15, 23, 42, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.login-body .form-control:focus {
    border-color: var(--color-primary);
}

.login-body label {
    color: var(--text-light);
}

/* Comment Box and History in Task Details */
.comment-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.comment-item {
    background-color: var(--bg-app);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-normal);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.comment-author {
    font-weight: 600;
    color: var(--text-main);
}

.comment-body {
    font-size: 14px;
    color: var(--text-main);
    white-space: pre-line;
}

.history-timeline {
    position: relative;
    padding-left: 20px;
    border-left: 2px solid var(--border-color);
}

.history-item {
    margin-bottom: 16px;
    position: relative;
}

.history-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-light);
    border: 2px solid var(--bg-card);
}

.history-content {
    font-size: 13px;
}

.history-time {
    font-size: 11px;
    color: var(--text-muted);
    display: block;
    margin-top: 2px;
}

/* Grid layout details */
.detail-grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 30px;
}

@media (max-width: 900px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }
}

.meta-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.meta-value {
    font-size: 14px;
    font-weight: 600;
}

/* Responsive sidebar hides under 768px */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .main-wrapper {
        margin-left: 0;
    }
    .main-header {
        padding: 0 16px;
    }
    .header-left {
        gap: 12px;
    }
    .header-right {
        gap: 12px;
    }
    .sidebar-toggle {
        display: block;
    }
    .user-info {
        display: none; /* Mobilde isim ve rolü gizleyerek sığma sorununu çözer */
    }
    .content-body {
        padding: 20px;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .filter-form {
        grid-template-columns: 1fr;
    }
    .filter-form button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .page-header button {
        width: 100%;
    }
}