:root {
    --bg-color: #f5f5f5;
    --container-bg: white;
    --text-color: #333;
    --header-color: #2c3e50;
    --form-bg: #f9f9f9;
    --input-border: #ddd;
    --btn-primary: #3498db;
    --btn-primary-hover: #2980b9;
    --btn-success: #27ae60;
    --btn-success-hover: #219955;
    --summary-bg: #e8f4fc;
    --table-border: #ddd;
    --table-header-bg: #f2f2f2;
    --table-alternate-row: #f9f9f9;
}

.dark-mode {
    --bg-color: #202124;
    --container-bg: #292a2d;
    --text-color: #e8eaed;
    --header-color: #8ab4f8;
    --form-bg: #35363a;
    --input-border: #5f6368;
    --btn-primary: #1a73e8;
    --btn-primary-hover: #1765cc;
    --btn-success: #1e8e3e;
    --btn-success-hover: #188534;
    --summary-bg: #1a1a1a;
    --table-border: #444;
    --table-header-bg: #2d2e31;
    --table-alternate-row: #35363a;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 20px;
    direction: rtl;
    color: var(--text-color);
    transition: all 0.3s ease;
}
.container {
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--container-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
h1, h2, h3 {
    color: var(--header-color);
    text-align: center;
    margin-bottom: 20px;
}
.form-container, .salary-container {
    background-color: var(--form-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}
.form-group {
    margin-bottom: 15px;
}
label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--text-color);
}
input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 16px;
    direction: rtl;
    background-color: var(--container-bg);
    color: var(--text-color);
}
button {
    background-color: var(--btn-primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}
button:hover {
    background-color: var(--btn-primary-hover);
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    border: 1px solid var(--table-border);
    padding: 12px;
    text-align: right;
}
th {
    background-color: var(--table-header-bg);
    font-weight: bold;
    color: var(--text-color);
}
tr:nth-child(even) {
    background-color: var(--table-alternate-row);
}
.search-container {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--form-bg);
    border-radius: 8px;
}
.btn-container {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}
.btn-export {
    background-color: var(--btn-success);
}
.btn-export:hover {
    background-color: var(--btn-success-hover);
}
.summary {
    margin-top: 20px;
    padding: 15px;
    background-color: var(--summary-bg);
    border-radius: 8px;
}
.total {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
}
.date-field {
    display: flex;
    gap: 10px;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.theme-toggle {
    background-color: transparent;
    border: 1px solid var(--input-border);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.stats-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
}
.stat-card {
    flex: 1;
    min-width: 200px;
    padding: 15px;
    background-color: var(--form-bg);
    border-radius: 8px;
    text-align: center;
}
.stat-value {
    font-size: 24px;
    font-weight: bold;
    margin: 10px 0;
}
.chart-container {
    width: 100%;
    height: 300px;
    margin-top: 30px;
}
.progress-bar {
    height: 20px;
    background-color: var(--input-border);
    border-radius: 10px;
    margin-top: 10px;
    overflow: hidden;
    position: relative;
}
.progress-fill {
    height: 100%;
    background-color: var(--btn-primary);
    border-radius: 10px;
    transition: width 0.5s ease;
}
.progress-text {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    text-shadow: 0 0 3px rgba(0,0,0,0.5);
}