:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --link-color: #007bff;
    --link-hover-color: #0056b3;
    --input-bg: #ffffff;
    --input-text: #000000;
    --input-border: #ccc;
    --nav-bg: #f8f9fa;
    --nav-border: #e7e7e7;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --text-color: #e0e0e0;
        --link-color: #8ab4f8;
        --link-hover-color: #ffffff;
        --input-bg: #333;
        --input-text: #e0e0e0;
        --input-border: #555;
        --nav-bg: #1e1e1e;
        --nav-border: #333;
    }
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --link-color: #8ab4f8;
    --link-hover-color: #ffffff;
    --input-bg: #333;
    --input-text: #e0e0e0;
    --input-border: #555;
    --nav-bg: #1e1e1e;
    --nav-border: #333;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    min-height: 100vh;
}

.sidebar {
    background-color: var(--nav-bg);
    padding: 20px;
    border-right: 1px solid var(--nav-border);
    width: 250px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--nav-border);
}

.sidebar-header h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.5rem;
    opacity: 0.9;
}

.main-wrapper {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    height: 100vh;
    overflow: hidden;
}

.top-bar {
    background-color: var(--nav-bg);
    padding: 10px 20px;
    border-bottom: 1px solid var(--nav-border);
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.nav-left {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-left a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: normal;
    font-size: 0.95rem;
    display: block;
    padding: 10px 15px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.nav-right a {
    text-decoration: none;
    color: var(--link-color);
    font-weight: bold;
    font-size: 0.95rem;
}

.nav-left a:hover {
    text-decoration: none;
    color: var(--text-color);
    background-color: rgba(128, 128, 128, 0.1);
    padding-left: 15px;
}

.nav-right a:hover {
    text-decoration: none;
    color: var(--link-hover-color);
}

.user-info {
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.container {
    display: flex;
    justify-content: center;
    padding: 20px;
    flex-grow: 1;
    overflow-y: auto;
}

.content {
    margin-top: 0;
    width: 100%;
    max-width: 1200px;
    background-color: var(--nav-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    height: fit-content;
}

input, select, textarea {
    margin-bottom: 15px;
    background-color: var(--input-bg);
    color: var(--input-text);
    border: 1px solid var(--input-border);
    padding: 10px;
    border-radius: 6px;
    font-size: 1rem;
}

button {
    padding: 10px 20px;
    cursor: pointer;
    background-color: var(--link-color);
    color: var(--bg-color);
    border: none;
    border-radius: 6px;
    font-weight: bold;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--link-hover-color);
}

.user-info select {
    width: auto;
    margin-bottom: 0;
}

#theme-toggle {
    width: auto;
    margin-top: 0;
    background: none;
    border: 1px solid var(--input-border);
    color: var(--text-color);
    padding: 5px 10px;
    font-size: 1.2rem;
}

#theme-toggle:hover {
    background-color: var(--input-bg);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    border: 1px solid var(--input-border);
    padding: 8px;
    text-align: left;
}

th {
    background-color: var(--nav-bg);
}