/* ===================================
   SOSYAL MEDYA YÖNETİM PLATFORMU
   Premium Modern Design System
   =================================== */

:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --success-500: #10b981;
    --warning-500: #f59e0b;
    --danger-500: #ef4444;
    --info-500: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --sidebar-width: 280px;
    --topbar-height: 72px;
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--gray-900);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   LAYOUT
   =================================== */

#app {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-200);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-base);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-gradient);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.nav-item:hover {
    background: var(--gray-50);
    color: var(--primary-600);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    color: var(--primary-600);
}

.nav-item.active::before {
    transform: scaleY(1);
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: background var(--transition-base);
    cursor: pointer;
}

.user-profile:hover {
    background: var(--gray-50);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.user-info {
    flex: 1;
}

.user-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--gray-900);
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.top-bar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 0 var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 50;
}

.search-bar {
    flex: 1;
    max-width: 500px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-bar svg {
    position: absolute;
    left: var(--spacing-md);
    color: var(--gray-400);
}

.search-bar input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 2.75rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    background: var(--gray-50);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-500);
    background: white;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--gray-50);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.icon-btn:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    background: var(--danger-500);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
}

/* Buttons */
.btn-primary {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--spacing-2xl);
    overflow-y: auto;
}

.page-view {
    display: none;
}

.page-view.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

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

.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-500);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.stat-icon.instagram {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-icon.engagement {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.stat-icon.reach {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-icon.scheduled {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.stat-change {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.stat-change.positive {
    color: var(--success-500);
}

.stat-change.negative {
    color: var(--danger-500);
}

.stat-change.neutral {
    color: var(--gray-500);
}

/* Charts */
.charts-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.chart-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.chart-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-900);
}

.chart-filter {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    background: white;
    cursor: pointer;
}

.chart-placeholder {
    height: 300px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-type-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.content-type-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.content-type-bar {
    height: 8px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.content-type-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.content-type-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
}

.content-type-label span {
    color: var(--gray-600);
}

.content-type-label strong {
    color: var(--gray-900);
    font-weight: 700;
}

/* Activity Section */
.activity-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
}

.view-all-link {
    color: var(--primary-600);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-base);
}

.view-all-link:hover {
    color: var(--primary-700);
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: background var(--transition-base);
}

.activity-item:hover {
    background: var(--gray-50);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.activity-icon.success {
    background: var(--success-500);
}

.activity-icon.info {
    background: var(--info-500);
}

.activity-icon.warning {
    background: var(--warning-500);
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.activity-time {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-2xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    animation: slideUp var(--transition-base);
}

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

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--gray-100);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Content Type Selector */
.content-type-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.content-type-btn {
    padding: var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background: white;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
}

.content-type-btn:hover {
    border-color: var(--primary-500);
    background: rgba(99, 102, 241, 0.05);
}

.content-type-btn.active {
    border-color: var(--primary-500);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.content-type-btn svg {
    color: var(--gray-600);
}

.content-type-btn.active svg {
    color: var(--primary-600);
}

.content-type-btn span {
    font-weight: 600;
    color: var(--gray-700);
}

.content-type-btn.active span {
    color: var(--primary-600);
}

/* Form Elements */
.content-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
}

.form-control {
    padding: var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    font-family: var(--font-family);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.ai-assist-btn {
    align-self: flex-start;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-base);
}

.ai-assist-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Media Upload */
.media-upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-base);
}

.media-upload-area:hover {
    border-color: var(--primary-500);
    background: rgba(99, 102, 241, 0.02);
}

.upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
}

.upload-label svg {
    color: var(--gray-400);
}

.upload-label span {
    font-weight: 600;
    color: var(--gray-700);
}

.upload-label small {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}

/* Schedule Options */
.schedule-options {
    display: flex;
    gap: var(--spacing-md);
}

.radio-option {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.radio-option:hover {
    border-color: var(--primary-500);
}

.radio-option input[type="radio"] {
    accent-color: var(--primary-500);
}

.radio-option input[type="radio"]:checked + span {
    font-weight: 600;
    color: var(--primary-600);
}

.schedule-datetime {
    margin-top: var(--spacing-md);
}

/* Hashtag Input */
.hashtag-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
}

.hashtag-suggest-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-base);
}

.hashtag-suggest-btn:hover {
    background: var(--gray-200);
}

.hashtag-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.hashtag-chip {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.hashtag-chip button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .charts-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .top-bar {
        padding: 0 var(--spacing-lg);
    }
    
    .page-content {
        padding: var(--spacing-lg);
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.hidden { display: none; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-md); }