:root {
    /* Light Theme Default */
    --bg-main: #f4f7f6;
    --bg-panel: #ffffff;
    --text-main: #333333;
    --primary-color: #0d6efd;
    --border-color: #cccccc;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-main: #0f111a;
    --bg-panel: #1e2130;
    --text-main: #ffffff;
    --primary-color: #3b82f6;
    --border-color: #444444;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: system-ui, sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    transition: background 0.3s, color 0.3s;
}

.login-card {
    background: var(--bg-panel);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 350px;
}

input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background: var(--bg-main);
    color: var(--text-main);
    box-sizing: border-box;
}

button.primary-btn {
    width: 100%;
    padding: 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Top Navigation Bar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-panel);
    padding: 15px 30px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border-color);
    width: 100%;
    box-sizing: border-box;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 25px;
}

.user-badge {
    background: var(--bg-main);
    padding: 8px 15px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logout-btn {
    color: #ef4444;
    font-weight: bold;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 5px;
    border: 1px solid #ef4444;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: #ef4444;
    color: white;
}