/**
 * Mendeva BackOffice - Dashboard Layout CSS
 * Sidebar + Header + Content Layout
 */

:root {
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 80px;
    --topbar-height: 65px;

    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --success: #48bb78;
    --danger: #f56565;
    --warning: #ed8936;
    --info: #4299e1;

    --text-dark: #1a202c;
    --text-gray: #718096;
    --text-light: #a0aec0;

    --bg-white: #ffffff;
    --bg-light: #f7fafc;
    --bg-gray: #edf2f7;
    --bg-dark: #1a1a2e;
    --bg-sidebar: #16213e;

    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);

    --radius: 10px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==================== SIDEBAR ==================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    color: #fff;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
    overflow: hidden;
}

/* Collapsed State */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-section-title,
.sidebar.collapsed .nav-item span {
    opacity: 0;
    visibility: hidden;
    width: 0;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.75rem;
    margin: 0.15rem 0.25rem;
}

.sidebar.collapsed .nav-section {
    margin-bottom: 0.5rem;
    padding: 0 0.25rem;
}

.sidebar.collapsed .nav-section-title {
    display: none;
}

.sidebar.collapsed .sidebar-nav {
    padding: 0.5rem 0;
    overflow: hidden;
}

.sidebar.collapsed .nav-item.active::before {
    display: none;
}

.sidebar.collapsed .nav-icon {
    width: 22px;
    height: 22px;
}

.sidebar.collapsed .sidebar-header {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0.75rem 0.5rem;
    gap: 0.5rem;
    min-height: 90px;
}

.sidebar.collapsed .sidebar-logo img {
    width: 60px;
    height: 24px;
}

.sidebar.collapsed .sidebar-toggle-btn {
    position: static;
    transform: none;
}

.sidebar.collapsed .toggle-icon {
    transform: rotate(180deg);
}

/* Sidebar Header - Menü ile aynı renk */
.sidebar-header {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-sidebar);
    min-height: 100px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.sidebar-logo img {
    width: 125px;
    height: 50px;
    object-fit: contain;
    border-radius: 6px;
    transition: var(--transition);
}

.sidebar-logo:hover img {
    transform: scale(1.05);
}

/* Toggle Button */
.sidebar-toggle-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.7);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.sidebar-toggle-btn:hover {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

.toggle-icon {
    transition: transform 0.3s ease;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    display: block;
    padding: 0.5rem 1.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,0.4);
    white-space: nowrap;
    transition: opacity 0.3s, visibility 0.3s;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    margin: 0.15rem 0.5rem;
    border-radius: var(--radius);
    white-space: nowrap;
}

.nav-item span {
    transition: opacity 0.3s, visibility 0.3s, width 0.3s;
}

.nav-item:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: #fff;
    border-radius: 0 2px 2px 0;
}

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

/* Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
}

/* ==================== TOPBAR ==================== */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 900;
    transition: left 0.3s ease;
}

body.sidebar-collapsed .topbar {
    left: var(--sidebar-collapsed-width);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
}

.menu-toggle:hover {
    background: var(--bg-light);
    color: var(--text-dark);
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.topbar-btn {
    position: relative;
    background: none;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.topbar-btn:hover {
    background: var(--bg-light);
    color: var(--text-dark);
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background: var(--danger);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.1rem 0.35rem;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-light);
    border: none;
    padding: 0.4rem 0.75rem 0.4rem 0.4rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
}

.user-dropdown-toggle:hover {
    background: var(--bg-gray);
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.3;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dark);
}

.user-id {
    font-size: 0.75rem;
    color: var(--text-gray);
}

.dropdown-arrow {
    color: var(--text-gray);
    transition: transform 0.2s;
}

.user-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    border: 1px solid var(--border);
    overflow: hidden;
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-dark);
    text-decoration: none;
    transition: background 0.2s;
}

.dropdown-item:hover {
    background: var(--bg-light);
}

.dropdown-item.text-danger {
    color: var(--danger);
}

.dropdown-item.text-danger:hover {
    background: #fff5f5;
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 0.25rem 0;
}

/* ==================== MAIN CONTENT ==================== */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: 1.5rem;
    min-height: calc(100vh - var(--topbar-height));
    transition: margin-left 0.3s ease;
}

body.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
}

/* ==================== CARDS ==================== */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.stat-change {
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

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

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

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 26px;
    height: 26px;
    color: #fff;
}

.stat-icon.purple { background: linear-gradient(135deg, #667eea, #764ba2); }
.stat-icon.green { background: linear-gradient(135deg, #48bb78, #38a169); }
.stat-icon.blue { background: linear-gradient(135deg, #4299e1, #3182ce); }
.stat-icon.orange { background: linear-gradient(135deg, #ed8936, #dd6b20); }

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}

/* Referans Box */
.ref-link-box {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius);
    padding: 1.5rem;
    color: #fff;
    margin-top: 1.25rem;
}

.ref-link-box h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.ref-link-box p {
    opacity: 0.9;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.ref-link-input {
    display: flex;
    gap: 0.5rem;
}

.ref-link-input input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.2);
    color: #fff;
    font-size: 0.9rem;
}

.ref-link-input input::placeholder {
    color: rgba(255,255,255,0.7);
}

.ref-link-input button {
    padding: 0.75rem 1.25rem;
    background: #fff;
    color: var(--primary);
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.ref-link-input button:hover {
    transform: scale(1.05);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        width: var(--sidebar-width) !important;
    }

    .sidebar.open .logo-text,
    .sidebar.open .nav-section-title,
    .sidebar.open .nav-item span {
        opacity: 1;
        visibility: visible;
        width: auto;
    }

    .sidebar-overlay.show {
        display: block;
        opacity: 1;
    }

    .topbar {
        left: 0 !important;
    }

    .menu-toggle {
        display: block;
    }

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

    .sidebar-toggle-btn {
        display: none;
    }
}

@media (max-width: 640px) {
    .topbar {
        padding: 0 1rem;
    }

    .user-info {
        display: none;
    }

    .main-content {
        padding: 1rem;
    }

    .page-title {
        font-size: 1.1rem;
    }

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

    .ref-link-input {
        flex-direction: column;
    }
}

/* ==================== SCROLLBAR ==================== */
.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
}

/* Collapsed modda scrollbar gizle */
.sidebar.collapsed .sidebar-nav::-webkit-scrollbar {
    display: none;
}

.sidebar.collapsed .sidebar-nav {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

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

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* ==================== TOOLTIP for Collapsed Sidebar ==================== */
.sidebar.collapsed .nav-item {
    position: relative;
}

.sidebar.collapsed .nav-item::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-dark);
    color: #fff;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    margin-left: 10px;
    z-index: 1001;
    pointer-events: none;
}

.sidebar.collapsed .nav-item:hover::after {
    opacity: 1;
    visibility: visible;
}

/* ==================== NOTIFICATION DROPDOWN ==================== */
.notification-dropdown {
    position: relative;
}

.notification-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 360px;
    max-height: 450px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1100;
    overflow: hidden;
}

.notification-dropdown.open .notification-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.notification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-light);
}

.notification-header span:first-child {
    font-weight: 600;
    color: var(--text-dark);
}

.notification-count {
    font-size: 0.75rem;
    color: var(--primary);
    background: rgba(102, 126, 234, 0.15);
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 600;
}

.notification-list {
    max-height: 350px;
    overflow-y: auto;
}

.notification-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    text-decoration: none;
    color: var(--text-dark);
    transition: background 0.2s;
    border-bottom: 1px solid var(--border);
}

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

.notification-item:hover {
    background: var(--bg-light);
}

.notification-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

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

.notification-title {
    font-weight: 500;
    font-size: 0.9rem;
    line-height: 1.3;
    margin-bottom: 0.2rem;
}

.notification-detail {
    font-size: 0.8rem;
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.notification-time {
    font-size: 0.75rem;
    color: var(--text-light);
}

.notification-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1rem;
    color: var(--text-gray);
    text-align: center;
}

.notification-empty p {
    margin-top: 0.75rem;
    font-size: 0.9rem;
}

/* Bildirim listesi scrollbar */
.notification-list::-webkit-scrollbar {
    width: 6px;
}

.notification-list::-webkit-scrollbar-track {
    background: transparent;
}

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

.notification-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

@media (max-width: 480px) {
    .notification-menu {
        width: 300px;
        right: -50px;
    }
}