/* style.css */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    color: #333;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}
nav {
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    padding: 10px 0;
    margin-bottom: 30px;
}
nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
nav h1 {
    margin: 0;
    font-size: 24px;
    color: #4a90e2;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}
nav ul li a {
    text-decoration: none;
    color: #555;
    padding: 15px;
    font-weight: 500;
}
nav ul li a.active {
    color: #4a90e2;
    border-bottom: 2px solid #4a90e2;
}
.card {
    background-color: #fff;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    padding: 20px;
    margin-bottom: 20px;
}
.card-header {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box; /* Önemli */
}
button {
    background-color: #4a90e2;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}
button:hover {
    background-color: #357abd;
}
.finans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}
.finans-box {
    text-align: center;
    padding: 20px;
}
.finans-box.gelir { background-color: #e6f7ea; border: 1px solid #b7e4c7; }
.finans-box.gider { background-color: #fdeaea; border: 1px solid #f5c6cb; }
.finans-box.net { background-color: #e6f2f7; border: 1px solid #b0c4de; }
.finans-box h3 { margin: 0 0 10px 0; }
.finans-box p { font-size: 24px; font-weight: 700; margin: 0; }
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}
th {
    background-color: #f9f9f9;
}