/* Variables para tema claro y oscuro */
:root {
    --bg-color: #f4f7f6;
    --container-bg: #ffffff;
    --text-color: #333333;
    --primary-color: #00796b;
    --header-bg: #00796b;
    --footer-bg: #00796b;
    --header-text: #ffffff;
    --footer-text: #ffffff;
    --input-bg: #e0f2f1;
    --border-color: #b2dfdb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --libre-color: #d32f2f;
    --regular-color: #ff9800;
    --promocionado-color: #388e3c;
}

.dark-theme {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --primary-color: #26a69a;
    --header-bg: #121212;
    --footer-bg: #121212;
    --header-text: #e0e0e0;
    --footer-text: #e0e0e0;
    --input-bg: #2c2c2c;
    --border-color: #444444;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --libre-color: #ff5252;
    --regular-color: #ffb74d;
    --promocionado-color: #66bb6a;
}

/* Estilos generales */
body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 0;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    box-sizing: border-box;
}

/* Estilos para header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 10px 20px;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

header h1 {
    font-size: 1.5rem;
    margin: 0;
    text-align: center;
}

.logo img {
    height: 40px;
}

.theme-switch button {
    background: none;
    border: none;
    color: var(--header-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
    margin: 0;
    width: auto;
    transition: transform 0.3s ease, color 0.3s ease;
}

.theme-switch button:hover {
    transform: rotate(30deg);
    background: none;
}

/* Contenedor principal */
.main-content {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    padding: 20px;
    gap: 30px;
    flex: 1;
}

.container {
    background-color: var(--container-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow-color);
    width: 100%;
    max-width: 400px;
}

.results-container {
    background-color: var(--container-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow-color);
    width: 100%;
    max-width: 300px;
    text-align: center;
}

h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.info-message {
    background-color: #e3f2fd;
    padding: 8px 12px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
    color: #1565c0;
    font-size: 0.9rem;
    border-left: 4px solid #1565c0;
}

.form-group {
    margin-bottom: 15px;
    background-color: var(--input-bg);
    padding: 10px 15px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-color);
    font-weight: bold;
    flex-grow: 1;
    margin-right: 10px;
}

select,
input[type="number"] {
    width: 80px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    text-align: right;
    background-color: var(--container-bg);
    color: var(--text-color);
}

#nombre {
    width: 300px;
    text-align: left;
}

#materiaSelect {
    width: 300px;
    text-align: left;
}

button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #004d40;
}

#resultado {
    margin-top: 20px;
    font-size: 1.1em;
}

#condicionFinal {
    font-weight: bold;
    font-size: 1.8em;
    margin: 15px 0;
}

#descripcionCondicion {
    color: var(--text-color);
    font-size: 0.95em;
}

.libre { color: var(--libre-color); }
.regular { color: var(--regular-color); }
.promocionado { color: var(--promocionado-color); }

.icon-placeholder {
    font-size: 4em;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: inline-block;
}

.dark-theme .info-message {
    background-color: #263238;
    color: #81d4fa;
    border-left: 4px solid #0288d1;
}

/* Estilos para footer */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 10px 0;
    margin-top: auto;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

footer a:hover {
    text-decoration: underline;
}

/* Media query para dispositivos móviles */
@media (max-width: 768px) {
    header h1 {
        font-size: 1rem;
    }
    
    .logo img {
        height: 30px;
    }
    
    .main-content {
        flex-direction: column;
        padding: 15px;
        gap: 15px;
        align-items: center;
    }
    
    .container, .results-container {
        max-width: 100%;
        margin-bottom: 15px;
    }
    
    .form-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    label {
        margin-bottom: 8px;
        margin-right: 0;
    }
    
    select, input[type="number"] {
        width: 100%;
        text-align: left;
    }
    
    #materiaSelect {
        width: 100%;
    }
}