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

:root {
    --primary: #2563eb;
    --secondary: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    --light: #f1f5f9;
    --dark: #1e293b;
    --border: #cbd5e1;
    --text: #334155;
    --bg: #ffffff;
    --shadow: rgba(37, 99, 235, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8fafc;
    color: var(--text);
    line-height: 1.5;
    font-size: 14px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Header */
header {
    background-color: var(--primary);
    color: white;
    padding: 8px 0;
    box-shadow: 0 2px 4px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 18px;
    font-weight: 600;
    color: white;
    text-decoration: none;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 13px;
}

.user-info span {
    display: none;
}

.btn-logout {
    background-color: var(--danger);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    text-decoration: none;
}

/* Navigation */
nav {
    background-color: var(--secondary);
    padding: 0;
    box-shadow: 0 2px 4px var(--shadow);
}

.nav-menu {
    display: flex;
    list-style: none;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-menu::-webkit-scrollbar {
    height: 3px;
}

.nav-menu::-webkit-scrollbar-thumb {
    background: var(--primary);
}

.nav-menu li {
    flex-shrink: 0;
}

.nav-menu a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 12px 16px;
    font-size: 13px;
    white-space: nowrap;
    transition: background-color 0.2s;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: var(--primary);
}

/* Main Content */
main {
    padding: 10px 0;
    flex: 1;
}

/* Cards */
.card {
    background-color: var(--bg);
    border-radius: 6px;
    box-shadow: 0 1px 3px var(--shadow);
    margin-bottom: 10px;
    overflow: hidden;
}

.card-header {
    padding: 10px 12px;
    background-color: var(--light);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 14px;
}

.card-body {
    padding: 12px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
    margin-bottom: 10px;
}

.stat-card {
    background-color: var(--bg);
    padding: 10px;
    border-radius: 6px;
    border-left: 3px solid;
    box-shadow: 0 1px 3px var(--shadow);
}

.stat-card.success {
    border-left-color: var(--success);
}

.stat-card.danger {
    border-left-color: var(--danger);
}

.stat-card.info {
    border-left-color: var(--info);
}

.stat-card.primary {
    border-left-color: var(--primary);
}

.stat-label {
    font-size: 11px;
    color: #64748b;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
}

/* Forms */
.form-group {
    margin-bottom: 10px;
}

.form-label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    font-size: 12px;
    color: var(--text);
}

.form-control {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

select.form-control {
    cursor: pointer;
}

/* Radio Buttons - Modern Stil */
.radio-group {
    display: flex;
    gap: 15px;
    margin-bottom: 12px;
}

.radio-option {
    flex: 1;
}

.radio-option input[type="radio"] {
    display: none;
}

.radio-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    font-size: 14px;
}

.radio-option input[type="radio"]:checked + .radio-label {
    border-color: var(--primary);
    background-color: rgba(37, 99, 235, 0.05);
    color: var(--primary);
}

.radio-option input[type="radio"]:checked + .radio-label.danger {
    border-color: var(--danger);
    background-color: rgba(239, 68, 68, 0.05);
    color: var(--danger);
}

.radio-option input[type="radio"]:checked + .radio-label.success {
    border-color: var(--success);
    background-color: rgba(16, 185, 129, 0.05);
    color: var(--success);
}

/* Form Row - Yan Yana */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

@media (max-width: 576px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Date input - mobil taşma düzeltmesi */
input[type="date"].form-control {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    transition: opacity 0.2s;
    text-align: center;
}

.btn:hover {
    opacity: 0.9;
}

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

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

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

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

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

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 6px 10px;
    font-size: 12px;
}

/* Table */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.table th,
.table td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    background-color: var(--light);
    font-weight: 600;
    white-space: nowrap;
}

.table tr:hover {
    background-color: #f8f9fa;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    color: white;
}

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

.badge-danger {
    background-color: var(--danger);
}

/* Alerts */
.alert {
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 15px;
    font-size: 13px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Footer */
footer {
    background-color: var(--primary);
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: auto;
    font-size: 13px;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 15px;
}

.login-card {
    width: 100%;
    max-width: 400px;
    background-color: var(--bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow);
}

.login-title {
    text-align: center;
    margin-bottom: 25px;
    color: var(--primary);
    font-size: 24px;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 15px; }
.mb-3 { margin-bottom: 20px; }

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 15px; }
.mt-3 { margin-top: 20px; }

.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }

/* Responsive */
@media (min-width: 768px) {
    body {
        font-size: 15px;
    }

    .user-info span {
        display: inline;
    }

    .logo {
        font-size: 20px;
    }

    .nav-menu a {
        font-size: 14px;
        padding: 14px 20px;
    }

    main {
        padding: 20px 0;
    }

    .card-header {
        padding: 15px 20px;
        font-size: 16px;
    }

    .card-body {
        padding: 20px;
    }

    .stats-grid {
        gap: 15px;
    }

    .stat-value {
        font-size: 24px;
    }

    .table th,
    .table td {
        padding: 12px;
    }
}