:root {
    --light-bg: #f5f5dc; /* Beige */
    --light-text: #333;
    --light-primary: #8b4513; /* SaddleBrown */
    --light-secondary: #a0522d; /* Sienna */
    --light-accent: #cd853f; /* Peru */
    
    --dark-bg: #2d2d2d;
    --dark-text: #f5f5f5;
    --dark-primary: #d2691e; /* Chocolate */
    --dark-secondary: #b8860b; /* DarkGoldenRod */
    --dark-accent: #cd853f; /* Peru */
}

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
}

.light-mode {
    background-color: var(--light-bg);
    color: var(--light-text);
}

.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    padding: 20px 0;
    border-bottom: 1px solid;
}

.light-mode header {
    border-color: var(--light-primary);
}

.dark-mode header {
    border-color: var(--dark-primary);
}

.logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.logo img {
    width: 80px;
    height: 80px;
    margin-right: 20px;
}

nav ul {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    margin-right: 20px;
}

nav a {
    text-decoration: none;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.light-mode nav a {
    color: var(--light-primary);
}

.dark-mode nav a {
    color: var(--dark-primary);
}

.light-mode nav a:hover {
    background-color: var(--light-accent);
    color: white;
}

.dark-mode nav a:hover {
    background-color: var(--dark-accent);
    color: white;
}

#darkModeToggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 5px 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

.light-mode #darkModeToggle {
    background-color: var(--light-primary);
    color: white;
}

.dark-mode #darkModeToggle {
    background-color: var(--dark-primary);
    color: white;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    padding: 10px;
    text-align: left;
    border: 1px solid;
}

.light-mode th, .light-mode td {
    border-color: var(--light-primary);
}

.dark-mode th, .dark-mode td {
    border-color: var(--dark-primary);
}

th {
    background-color: var(--light-primary);
    color: white;
}

.dark-mode th {
    background-color: var(--dark-primary);
}

form {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    border-radius: 10px;
}

.light-mode form {
    background-color: #e6e6d2;
    border: 1px solid var(--light-primary);
}

.dark-mode form {
    background-color: #3d3d3d;
    border: 1px solid var(--dark-primary);
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input, select {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    border: 1px solid;
}

.light-mode input, .light-mode select {
    border-color: var(--light-primary);
    background-color: white;
    color: var(--light-text);
}

.dark-mode input, .dark-mode select {
    border-color: var(--dark-primary);
    background-color: #555;
    color: var(--dark-text);
}

button, .btn {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

.light-mode button, .light-mode .btn {
    background-color: var(--light-primary);
    color: white;
}

.dark-mode button, .dark-mode .btn {
    background-color: var(--dark-primary);
    color: white;
}

button:hover, .btn:hover {
    opacity: 0.9;
}

.alert {
    padding: 10px;
    margin: 10px 0;
    border-radius: 5px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
}

@media (max-width: 768px) {
    .logo {
        flex-direction: column;
        text-align: center;
    }
    
    .logo img {
        margin-right: 0;
        margin-bottom: 10px;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav li {
        margin-right: 0;
        margin-bottom: 10px;
    }
    
    #darkModeToggle {
        position: static;
        margin-top: 10px;
    }
}

/* Estilo para la tabla */
.tabla-notas {
    border-collapse: collapse;
    width: 100%;
}

/* Separador visual entre alumnos */
.tabla-notas tr.separador-alumno td {
    border-top: 2px solid #8b4513; /* Color marrón que combina con tu tema */
    padding: 10px 0;
}

.tabla-notas tr.separador-alumno td {
    border-left: transparent;
    border-right: transparent;
}

.tabla-notas tr.separador-alumno:hover {
    background-color: transparent !important;
}

/* Opcional: Resaltar filas */
.tabla-notas tbody tr:hover {
    background-color: rgba(139, 69, 19, 0.1); /* Tono claro del color principal */
}

.alert.alert-info {
    background-color: #f8f4e6;
    border: 1px solid #d4c9a3;
    color: #8b4513;
    padding: 15px;
    border-radius: 5px;
    text-align: center;
    margin: 20px auto;
    max-width: 600px;
}