@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #263449;
    --bg-input: #0f172a;
    --border-color: #334155;
    --border-accent: #475569;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #3b82f6;
    --accent-primary-hover: #2563eb;
    --accent-success: #10b981;
    --accent-success-bg: rgba(16, 185, 129, 0.1);
    --accent-danger: #ef4444;
    --accent-danger-bg: rgba(239, 68, 68, 0.1);
    --accent-warning: #f59e0b;
    --accent-warning-bg: rgba(245, 158, 11, 0.1);
    --accent-info: #06b6d4;
    --accent-info-bg: rgba(6, 182, 212, 0.1);
    --accent-purple: #8b5cf6;
    --accent-purple-bg: rgba(139, 92, 246, 0.1);
    --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-success: linear-gradient(135deg, #10b981, #06b6d4);
    --gradient-danger: linear-gradient(135deg, #ef4444, #f59e0b);
    --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 50px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-accent); }

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 270px;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    overflow-y: auto;
}

.sidebar-brand {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand .brand-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient-warm);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.sidebar-brand .brand-text {
    display: flex;
    flex-direction: column;
}

.sidebar-brand .brand-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.sidebar-brand .brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.sidebar-nav {
    padding: 16px 12px;
    flex: 1;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 12px 12px 6px;
    margin-top: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
    position: relative;
}

.nav-item:hover {
    background: rgba(59, 130, 246, 0.08);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--accent-primary);
    border-radius: 0 3px 3px 0;
}

.nav-item .nav-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--accent-danger);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 50px;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: 270px;
    min-height: 100vh;
    padding: 0;
}

.page-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.page-header h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-header .breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.page-body {
    padding: 28px 32px;
}

/* ===== STAT CARDS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.stat-card.blue::before { background: var(--gradient-primary); }
.stat-card.green::before { background: var(--gradient-success); }
.stat-card.red::before { background: var(--gradient-danger); }
.stat-card.purple::before { background: linear-gradient(135deg, #8b5cf6, #a855f7); }
.stat-card.yellow::before { background: var(--gradient-warm); }
.stat-card.info::before { background: linear-gradient(135deg, #06b6d4, #0ea5e9); }

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

.stat-card .stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.stat-card .stat-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.stat-card .stat-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-card.blue .stat-icon { background: rgba(59, 130, 246, 0.15); color: var(--accent-primary); }
.stat-card.green .stat-icon { background: var(--accent-success-bg); color: var(--accent-success); }
.stat-card.red .stat-icon { background: var(--accent-danger-bg); color: var(--accent-danger); }
.stat-card.purple .stat-icon { background: var(--accent-purple-bg); color: var(--accent-purple); }
.stat-card.yellow .stat-icon { background: var(--accent-warning-bg); color: var(--accent-warning); }
.stat-card.info .stat-icon { background: var(--accent-info-bg); color: var(--accent-info); }

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.stat-card .stat-value.currency::before {
    content: '₺';
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-right: 4px;
}

/* ===== TABLE CARD ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.card-header h2,
.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 24px;
}

.card-body.no-padding {
    padding: 0;
}

/* ===== DATA TABLE ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    padding: 12px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: rgba(15, 23, 42, 0.5);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table tbody tr {
    transition: var(--transition);
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

.data-table tbody tr:hover {
    background: rgba(59, 130, 246, 0.04);
}

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

.data-table tbody td {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    vertical-align: middle;
}

.data-table .customer-name {
    font-weight: 600;
    color: var(--text-primary);
}

.data-table .customer-name a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.data-table .customer-name a:hover {
    color: var(--accent-primary);
}

.amount-positive { color: var(--accent-danger) !important; font-weight: 600; }
.amount-negative { color: var(--accent-success) !important; font-weight: 600; }
.amount-zero { color: var(--text-muted) !important; }
.amount-bold { font-weight: 700; font-size: 15px; }

/* ===== BADGES ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    gap: 4px;
}

.badge-success { background: var(--accent-success-bg); color: var(--accent-success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-danger { background: var(--accent-danger-bg); color: var(--accent-danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.badge-warning { background: var(--accent-warning-bg); color: var(--accent-warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-info { background: var(--accent-info-bg); color: var(--accent-info); border: 1px solid rgba(6, 182, 212, 0.2); }
.badge-primary { background: rgba(59, 130, 246, 0.1); color: var(--accent-primary); border: 1px solid rgba(59, 130, 246, 0.2); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(59, 130, 246, 0.4);
    color: white;
}

.btn-success {
    background: var(--gradient-success);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
    color: white;
}

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

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
    color: white;
}

.btn-warning {
    background: var(--gradient-warm);
    color: white;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(245, 158, 11, 0.4);
    color: white;
}

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

.btn-outline:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

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

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

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-control {
    width: 100%;
    padding: 11px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

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

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='%2394a3b8' d='M6 8.5L1 3.5h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-inline {
    display: flex;
    gap: 12px;
    align-items: end;
    flex-wrap: wrap;
}

.form-inline .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 150px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.form-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.form-check label {
    margin-bottom: 0;
    cursor: pointer;
    text-transform: none;
    letter-spacing: normal;
}

/* ===== ALERTS ===== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease-out;
}

.alert-success {
    background: var(--accent-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--accent-success);
}

.alert-danger {
    background: var(--accent-danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--accent-danger);
}

.alert-warning {
    background: var(--accent-warning-bg);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: var(--accent-warning);
}

/* ===== TRANSACTION TIMELINE ===== */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding: 14px 0;
    padding-left: 24px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -22px;
    top: 20px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid;
}

.timeline-item.sale::before { border-color: var(--accent-danger); background: var(--accent-danger-bg); }
.timeline-item.payment::before { border-color: var(--accent-success); background: var(--accent-success-bg); }
.timeline-item.adjustment::before { border-color: var(--accent-warning); background: var(--accent-warning-bg); }

/* ===== SEARCH BOX ===== */
.search-box {
    position: relative;
}

.search-box input {
    padding-left: 42px;
}

.search-box .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
}

/* ===== FILTER BAR ===== */
.filter-bar {
    display: flex;
    gap: 12px;
    align-items: end;
    flex-wrap: wrap;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.filter-bar .form-group {
    margin-bottom: 0;
    min-width: 160px;
}

/* ===== MAHALLE TAG ===== */
.mahalle-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid rgba(139, 92, 246, 0.15);
}

/* ===== INFO ROW ===== */
.info-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

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

.info-item .info-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.info-item .info-value {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 600;
}

/* ===== MOBILE MENU ===== */
.mobile-toggle {
    display: none;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: 20px;
    cursor: pointer;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.4s ease-out;
}

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

.empty-state .empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 15px;
    margin-bottom: 16px;
}

/* ===== SUMMARY ROW ===== */
.data-table tfoot td {
    padding: 14px 16px;
    font-weight: 700;
    color: var(--text-primary);
    background: rgba(15, 23, 42, 0.5);
    border-top: 2px solid var(--border-color);
    font-size: 15px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .mobile-toggle {
        display: block;
    }
    .page-body {
        padding: 20px 16px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .filter-bar {
        flex-direction: column;
    }
    .filter-bar .form-group {
        width: 100%;
    }
    .page-header {
        padding: 16px 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .page-header h1 {
        font-size: 18px;
    }
    .data-table {
        display: block;
        overflow-x: auto;
    }
}

/* ===== PRINT ===== */
@media print {
    .sidebar, .page-header, .btn, .filter-bar, .mobile-toggle { display: none !important; }
    .main-content { margin-left: 0; }
    .page-body { padding: 0; }
    .card { border: 1px solid #ddd; box-shadow: none; }
    body { background: white; color: black; }
    .data-table thead th { background: #f0f0f0; color: black; }
    .data-table tbody td { color: black; }
}