/* =================================================
ESTILOS PRINCIPALES (styles.css) 
=================================================
Diseño profesional, limpio y centrado.
*/

:root {
    --color-primary: #007bff; /* Azul corporativo */
    --color-secondary: #6c757d; 
    --color-success: #28a745; 
    --color-info: #17a2b8;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-light: #f8f9fa;
    --color-dark: #343a40;
    --font-family: 'Arial', sans-serif;
}

/* Estilos de la página */
body {
    font-family: var(--font-family);
    background-color: var(--color-light);
    color: var(--color-dark);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

/* Contenedor central (Card) */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* Títulos */
h2 {
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 5px;
    font-size: 2.2em;
}

h3 {
    text-align: center;
    color: var(--color-dark);
    margin-top: 25px;
    margin-bottom: 25px;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 20px 0;
}

/* ==================
   FORMULARIOS Y INPUTS
   ================== */
label {
    display: block;
    margin-bottom: 5px;
    margin-top: 15px;
    font-weight: bold;
    color: #555;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
input[type="date"],
select {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    border-color: var(--color-primary);
    outline: none;
}

/* ==================
   BOTONES (Buttons)
   ================== */
.btn {
    display: inline-block;
    padding: 12px 25px;
    font-size: 1em;
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background-color 0.3s, transform 0.2s, box-shadow 0.2s;
    user-select: none;
}

/* Botón de envío principal */
input[type="submit"].btn-primary, .btn-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

input[type="submit"].btn-primary:hover, .btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    transform: translateY(-1px);
}

/* Otros colores de botones */
.btn-secondary { background-color: var(--color-secondary); color: white; border-color: var(--color-secondary); }
.btn-info { background-color: var(--color-info); color: white; border-color: var(--color-info); }
.btn-success { background-color: var(--color-success); color: white; border-color: var(--color-success); }
.btn-warning { background-color: var(--color-warning); color: var(--color-dark); border-color: var(--color-warning); }
.btn-danger { background-color: var(--color-danger); color: white; border-color: var(--color-danger); }

.btn-secondary:hover { background-color: #5a6268; border-color: #545b62; }
.btn-info:hover { background-color: #117a8b; border-color: #10707f; }
.btn-success:hover { background-color: #1e7e34; border-color: #1c7430; }
.btn-warning:hover { background-color: #d39e00; border-color: #c69500; }
.btn-danger:hover { background-color: #bd2130; border-color: #b21f2d; }


/* ==================
   MENSAJES DE ESTADO
   ================== */
.mensaje {
    padding: 15px;
    margin-bottom: 25px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    border: 1px solid transparent;
}

.mensaje-exito {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.mensaje-error {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.mensaje-advertencia {
    background-color: #fff3cd;
    color: #856404;
    border-color: #ffeeba;
}

.mensaje-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

/* ==================
   ESTILOS ESPECÍFICOS DEL MENÚ
   ================== */
.info-sesion {
    padding: 15px;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 30px;
    font-size: 1.1em;
}

.opciones-grid {
    display: grid;
    /* 3 columnas en escritorio, adaptable */
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
    gap: 20px;
    margin-bottom: 20px;
}

/* Botones del menú (los bloques grandes) */
.btn-block {
    display: flex; /* Usar flex para centrar contenido verticalmente */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 120px; 
    text-align: center;
    padding: 20px 15px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08); /* Sombra sutil */
    text-decoration: none;
}
.btn-block:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15); /* Sombra más pronunciada al pasar el ratón */
}

/* Botón de Cerrar Sesión (más grande y centrado) */
.btn-large {
    padding: 14px 30px;
    font-size: 1.2em;
}

/* Responsive: Una sola columna en móviles */
@media (max-width: 600px) {
    .container {
        padding: 15px;
        margin: 20px auto;
    }
    .opciones-grid {
        grid-template-columns: 1fr;
    }
}

        .campo-piezas {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-bottom: 10px;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            background-color: #f9f9f9;
        }
        .campo-piezas input[type="text"], .campo-piezas input[type="number"] {
            flex-grow: 1;
        }
        .campo-piezas button {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            background-color: #dc3545;
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            line-height: 1;
            padding: 0;
            font-weight: bold;
        }