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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.navbar h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Saat Göstergesi */
.datetime-display {
    text-align: right;
    font-size: 0.9rem;
    color: var(--text-color);
    background: var(--bg-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    min-width: 200px;
}

.datetime-display .date {
    font-weight: 600;
    color: var(--primary-color);
}

.datetime-display .time {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

/* Login Page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.login-box h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.login-info {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 5px;
    font-size: 0.9rem;
}

.login-info p {
    margin: 0.25rem 0;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    text-align: center;
}

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

.btn:disabled,
input:disabled,
select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: #e2e8f0 !important;
    color: #64748b !important;
}

.btn-primary:disabled {
    background-color: #cbd5e1 !important;
    color: #64748b !important;
}

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #475569;
}

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

.btn-success:hover {
    background-color: #059669;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="file"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.form-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success-color);
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--error-color);
}

/* Dashboard Cards */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.card h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.card p {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card h3 {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Charts */
.chart-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.chart-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.chart-container canvas {
    max-height: 400px;
}

/* Tables */
.table-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    overflow-x: auto;
}

.table-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background-color: var(--primary-color);
    color: white;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background-color: var(--bg-color);
}

/* Filter Section */
.filter-section {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.quick-filters {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.quick-filters h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-buttons .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.filter-form {
    display: flex;
    gap: 1rem;
    align-items: end;
    flex-wrap: wrap;
}

.filter-form .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

/* Preview Images */
.preview-image {
    max-width: 200px;
    max-height: 200px;
    margin-top: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    transition: all 0.3s;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    padding: 2rem;
    overflow-y: auto;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-content {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    max-width: 400px;
    margin: 0 auto;
    margin-top: 4rem;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.mobile-menu-header h2 {
    margin: 0;
    color: var(--primary-color);
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s;
}

.mobile-menu-close:hover {
    background: var(--bg-color);
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu-links a {
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 5px;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s;
    text-align: center;
}

.mobile-menu-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

/* Chart Scroll Wrapper */
.chart-scroll-wrapper {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    margin: -1.5rem;
    padding: 1.5rem;
}

.chart-scroll-wrapper canvas {
    min-width: 600px;
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .navbar .nav-links {
        display: none;
    }

    .navbar .container {
        flex-wrap: wrap;
    }

    .datetime-display {
        min-width: auto;
        width: 100%;
        text-align: center;
        order: 3;
        margin-top: 1rem;
    }

    .dashboard-cards {
        grid-template-columns: 1fr;
    }

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

    .filter-form {
        flex-direction: column;
    }

    .filter-form .form-group {
        width: 100%;
    }

    .filter-buttons {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .filter-buttons .btn {
        flex: 1;
        min-width: calc(50% - 0.25rem);
    }

    .kategori-tabs {
        flex-wrap: wrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .kategori-tab {
        white-space: nowrap;
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
    }

    .chart-wrapper {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .chart-scroll-wrapper {
        margin: -1rem;
        padding: 1rem;
    }

    .chart-scroll-wrapper canvas {
        min-width: 500px;
    }

    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .data-table {
        min-width: 800px;
    }

    .dashboard-header {
        padding: 1.5rem;
    }

    .dashboard-header h1 {
        font-size: 1.5rem;
    }

    .analiz-section {
        padding: 1rem;
    }

    .haftalik-kullanim-card {
        padding: 1.5rem;
    }

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

    .stok-uyari {
        padding: 1rem;
    }

    .stok-uyari h3 {
        font-size: 1.1rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-card h3 {
        font-size: 0.9rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    .navbar {
        padding: 0.5rem 0;
    }

    .navbar h1 {
        font-size: 1.2rem;
    }

    .dashboard-header {
        padding: 1rem;
    }

    .dashboard-header h1 {
        font-size: 1.3rem;
    }

    .filter-section {
        padding: 1rem;
    }

    .chart-scroll-wrapper canvas {
        min-width: 400px;
    }

    .data-table {
        min-width: 700px;
        font-size: 0.85rem;
    }

    .kategori-tab {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
}